mirror of
https://github.com/material-components/material-components-ios.git
synced 2026-02-20 08:27:32 +08:00
bc119b3b73
* [TextFields] Example cleanup. * [TextFields] Copy correction * [TextFields] Example file rename.
469 lines
17 KiB
Swift
469 lines
17 KiB
Swift
/*
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Copyright 2016-present the Material Components for iOS authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// swiftlint:disable function_body_length
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import MaterialComponents.MaterialTextFields
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final class TextFieldUnderlineSwiftExample: UIViewController {
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let scrollView = UIScrollView()
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let name: MDCTextField = {
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let name = MDCTextField()
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name.translatesAutoresizingMaskIntoConstraints = false
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name.autocapitalizationType = .words
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return name
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}()
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let address: MDCTextField = {
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let address = MDCTextField()
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address.translatesAutoresizingMaskIntoConstraints = false
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address.autocapitalizationType = .words
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return address
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}()
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let city: MDCTextField = {
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let city = MDCTextField()
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city.translatesAutoresizingMaskIntoConstraints = false
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city.autocapitalizationType = .words
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return city
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}()
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let cityController: MDCTextInputControllerUnderline
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let state: MDCTextField = {
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let state = MDCTextField()
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state.translatesAutoresizingMaskIntoConstraints = false
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state.autocapitalizationType = .allCharacters
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return state
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}()
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let stateController: MDCTextInputControllerUnderline
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let zip: MDCTextField = {
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let zip = MDCTextField()
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zip.translatesAutoresizingMaskIntoConstraints = false
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return zip
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}()
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let zipController: MDCTextInputControllerUnderline
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let phone: MDCTextField = {
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let phone = MDCTextField()
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phone.translatesAutoresizingMaskIntoConstraints = false
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return phone
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}()
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let message: MDCMultilineTextField = {
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let message = MDCMultilineTextField()
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message.translatesAutoresizingMaskIntoConstraints = false
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return message
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}()
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var allTextFieldControllers = [MDCTextInputControllerUnderline]()
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override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
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stateController = MDCTextInputControllerUnderline(textInput: state)
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cityController = MDCTextInputControllerUnderline(textInput: city)
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zipController = MDCTextInputControllerUnderline(textInput: zip)
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super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = UIColor(white:0.97, alpha: 1.0)
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title = "Material Text Fields"
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setupScrollView()
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setupTextFields()
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registerKeyboardNotifications()
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addGestureRecognizer()
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let styleButton = UIBarButtonItem(title: "Style",
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style: .plain,
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target: self,
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action: #selector(buttonDidTouch(sender: )))
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self.navigationItem.rightBarButtonItem = styleButton
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}
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func setupTextFields() {
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scrollView.addSubview(name)
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let nameController = MDCTextInputControllerUnderline(textInput: name)
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name.delegate = self
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name.text = "Grace Hopper"
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nameController.placeholderText = "Name"
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nameController.helperText = "First and Last"
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allTextFieldControllers.append(nameController)
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scrollView.addSubview(address)
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let addressController = MDCTextInputControllerUnderline(textInput: address)
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address.delegate = self
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addressController.placeholderText = "Address"
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allTextFieldControllers.append(addressController)
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scrollView.addSubview(city)
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city.delegate = self
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cityController.placeholderText = "City"
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allTextFieldControllers.append(cityController)
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// In iOS 9+, you could accomplish this with a UILayoutGuide.
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// TODO: (larche) add iOS version specific implementations
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let stateZip = UIView()
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stateZip.translatesAutoresizingMaskIntoConstraints = false
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scrollView.addSubview(stateZip)
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stateZip.addSubview(state)
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state.delegate = self
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stateController.placeholderText = "State"
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allTextFieldControllers.append(stateController)
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stateZip.addSubview(zip)
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zip.delegate = self
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zipController.placeholderText = "Zip Code"
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zipController.helperText = "XXXXX"
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allTextFieldControllers.append(zipController)
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scrollView.addSubview(phone)
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let phoneController = MDCTextInputControllerUnderline(textInput: phone)
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phone.delegate = self
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phoneController.placeholderText = "Phone Number"
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allTextFieldControllers.append(phoneController)
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scrollView.addSubview(message)
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let messageController = MDCTextInputControllerUnderline(textInput: message)
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message.textView?.delegate = self
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#if swift(>=3.2)
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message.text = """
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This is where you could put a multi-line message like an email.
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It can even handle new lines.
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"""
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#else
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message.text = "This is where you could put a multi-line message like an email. It can even handle new lines./n"
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#endif
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message.multilineDelegate = self
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messageController.placeholderText = "Message"
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allTextFieldControllers.append(messageController)
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var tag = 0
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for controller in allTextFieldControllers {
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guard let textField = controller.textInput as? MDCTextField else { continue }
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textField.tag = tag
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tag += 1
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}
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let views = [ "name": name,
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"address": address,
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"city": city,
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"stateZip": stateZip,
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"phone": phone,
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"message": message ]
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var constraints = NSLayoutConstraint.constraints(withVisualFormat:
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"V:[name]-[address]-[city]-[stateZip]-[phone]-[message]",
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options: [.alignAllLeading, .alignAllTrailing],
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metrics: nil,
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views: views)
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constraints += [NSLayoutConstraint(item: name,
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attribute: .leading,
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relatedBy: .equal,
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toItem: view,
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attribute: .leadingMargin,
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multiplier: 1,
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constant: 0)]
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constraints += [NSLayoutConstraint(item: name,
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attribute: .trailing,
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relatedBy: .equal,
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toItem: view,
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attribute: .trailingMargin,
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multiplier: 1,
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constant: 0)]
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constraints += NSLayoutConstraint.constraints(withVisualFormat: "H:[name]|",
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options: [],
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metrics: nil,
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views: views)
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#if swift(>=3.2)
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if #available(iOS 11.0, *) {
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constraints += [NSLayoutConstraint(item: name,
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attribute: .top,
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relatedBy: .equal,
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toItem: scrollView.contentLayoutGuide,
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attribute: .top,
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multiplier: 1,
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constant: 20),
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NSLayoutConstraint(item: message,
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attribute: .bottom,
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relatedBy: .equal,
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toItem: scrollView.contentLayoutGuide,
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attribute: .bottomMargin,
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multiplier: 1,
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constant: -20)]
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} else {
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constraints += [NSLayoutConstraint(item: name,
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attribute: .top,
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relatedBy: .equal,
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toItem: scrollView,
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attribute: .top,
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multiplier: 1,
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constant: 20),
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NSLayoutConstraint(item: message,
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attribute: .bottom,
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relatedBy: .equal,
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toItem: scrollView,
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attribute: .bottomMargin,
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multiplier: 1,
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constant: -20)]
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}
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#else
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constraints += [NSLayoutConstraint(item: name,
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attribute: .top,
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relatedBy: .equal,
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toItem: scrollView,
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attribute: .top,
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multiplier: 1,
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constant: 20),
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NSLayoutConstraint(item: message,
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attribute: .bottom,
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relatedBy: .equal,
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toItem: scrollView,
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attribute: .bottomMargin,
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multiplier: 1,
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constant: -20)]
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#endif
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let stateZipViews = [ "state": state, "zip": zip ]
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constraints += NSLayoutConstraint.constraints(withVisualFormat: "H:|[state(80)]-[zip]|",
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options: [.alignAllTop],
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metrics: nil,
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views: stateZipViews)
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constraints += NSLayoutConstraint.constraints(withVisualFormat: "V:|[state]|",
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options: [],
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metrics: nil,
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views: stateZipViews)
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constraints += NSLayoutConstraint.constraints(withVisualFormat: "V:|[zip]|",
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options: [],
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metrics: nil,
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views: stateZipViews)
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NSLayoutConstraint.activate(constraints)
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}
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func setupScrollView() {
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view.addSubview(scrollView)
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scrollView.translatesAutoresizingMaskIntoConstraints = false
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NSLayoutConstraint.activate(NSLayoutConstraint.constraints(
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withVisualFormat: "V:|[scrollView]|",
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options: [],
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metrics: nil,
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views: ["scrollView": scrollView]))
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NSLayoutConstraint.activate(NSLayoutConstraint.constraints(withVisualFormat: "H:|[scrollView]|",
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options: [],
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metrics: nil,
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views: ["scrollView": scrollView]))
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let marginOffset: CGFloat = 16
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let margins = UIEdgeInsets(top: 0, left: marginOffset, bottom: 0, right: marginOffset)
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scrollView.layoutMargins = margins
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}
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func addGestureRecognizer() {
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let tapRecognizer = UITapGestureRecognizer(target: self,
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action: #selector(tapDidTouch(sender: )))
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self.scrollView.addGestureRecognizer(tapRecognizer)
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}
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// MARK: - Actions
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@objc func tapDidTouch(sender: Any) {
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self.view.endEditing(true)
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}
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@objc func buttonDidTouch(sender: Any) {
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let isFloatingEnabled = allTextFieldControllers.first?.isFloatingEnabled ?? false
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let alert = UIAlertController(title: "Floating Labels",
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message: nil,
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preferredStyle: .actionSheet)
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let defaultAction = UIAlertAction(title: "Default (Yes)" + (isFloatingEnabled ? " ✓" : ""),
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style: .default) { _ in
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self.allTextFieldControllers.forEach({ (controller) in
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controller.isFloatingEnabled = true
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})
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}
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alert.addAction(defaultAction)
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let floatingAction = UIAlertAction(title: "No" + (isFloatingEnabled ? "" : " ✓"),
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style: .default) { _ in
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self.allTextFieldControllers.forEach({ (controller) in
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controller.isFloatingEnabled = false
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})
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}
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alert.addAction(floatingAction)
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present(alert, animated: true, completion: nil)
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}
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}
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extension TextFieldUnderlineSwiftExample: UITextFieldDelegate {
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func textField(_ textField: UITextField,
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shouldChangeCharactersIn range: NSRange,
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replacementString string: String) -> Bool {
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guard let rawText = textField.text else {
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return true
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}
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let fullString = NSString(string: rawText).replacingCharacters(in: range, with: string)
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if textField == state {
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if let range = fullString.rangeOfCharacter(from: CharacterSet.letters.inverted),
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fullString[range].characterCount > 0 {
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stateController.setErrorText("Error: State can only contain letters",
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errorAccessibilityValue: nil)
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} else {
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stateController.setErrorText(nil, errorAccessibilityValue: nil)
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}
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} else if textField == zip {
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if let range = fullString.rangeOfCharacter(from: CharacterSet.letters),
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fullString[range].characterCount > 0 {
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zipController.setErrorText("Error: Zip can only contain numbers",
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errorAccessibilityValue: nil)
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} else if fullString.characterCount > 5 {
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zipController.setErrorText("Error: Zip can only contain five digits",
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errorAccessibilityValue: nil)
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} else {
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zipController.setErrorText(nil, errorAccessibilityValue: nil)
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}
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} else if textField == city {
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if let range = fullString.rangeOfCharacter(from: CharacterSet.decimalDigits),
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fullString[range].characterCount > 0 {
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cityController.setErrorText("Error: City can only contain letters",
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errorAccessibilityValue: nil)
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} else {
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cityController.setErrorText(nil, errorAccessibilityValue: nil)
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}
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}
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return true
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}
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func textFieldShouldReturn(_ textField: UITextField) -> Bool {
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let index = textField.tag
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if index + 1 < allTextFieldControllers.count,
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let nextField = allTextFieldControllers[index + 1].textInput {
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nextField.becomeFirstResponder()
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} else {
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textField.resignFirstResponder()
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}
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return false
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}
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}
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extension TextFieldUnderlineSwiftExample: UITextViewDelegate {
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func textViewDidEndEditing(_ textView: UITextView) {
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print(textView.text)
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}
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}
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extension TextFieldUnderlineSwiftExample: MDCMultilineTextInputDelegate {
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func multilineTextFieldShouldClear(_ textField: UIView!) -> Bool {
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return true
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}
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}
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// MARK: - Keyboard Handling
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extension TextFieldUnderlineSwiftExample {
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func registerKeyboardNotifications() {
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let notificationCenter = NotificationCenter.default
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notificationCenter.addObserver(
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self,
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selector: #selector(keyboardWillShow(notif:)),
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name: .UIKeyboardWillShow,
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object: nil)
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notificationCenter.addObserver(
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self,
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selector: #selector(keyboardWillHide(notif:)),
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name: .UIKeyboardWillHide,
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object: nil)
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notificationCenter.addObserver(
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self,
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selector: #selector(keyboardWillShow(notif:)),
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name: .UIKeyboardWillChangeFrame,
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object: nil)
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}
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@objc func keyboardWillShow(notif: Notification) {
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guard let frame = notif.userInfo?[UIKeyboardFrameEndUserInfoKey] as? CGRect else {
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return
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}
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scrollView.contentInset = UIEdgeInsets(top: 0.0,
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left: 0.0,
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bottom: frame.height,
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right: 0.0)
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}
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@objc func keyboardWillHide(notif: Notification) {
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scrollView.contentInset = UIEdgeInsets()
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}
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}
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// MARK: - Status Bar Style
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extension TextFieldUnderlineSwiftExample {
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override var preferredStatusBarStyle: UIStatusBarStyle {
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return .lightContent
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}
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}
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// MARK: - CatalogByConvention
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extension TextFieldUnderlineSwiftExample {
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@objc class func catalogBreadcrumbs() -> [String] {
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return ["Text Field", "Underline Style"]
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}
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@objc class func catalogDescription() -> String {
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// swiftlint:disable:next line_length
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return "Text fields let users enter and edit text."
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}
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@objc class func catalogIsPrimaryDemo() -> Bool {
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return false
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}
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@objc class func catalogIsPresentable() -> Bool {
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return false
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}
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}
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internal extension String {
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var characterCount: Int {
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#if swift(>=3.2)
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return self.count
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#else
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return self.characters.count
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#endif
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}
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}
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