mirror of
https://github.com/material-components/material-components-ios.git
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bb561ac257
* Integrate SwiftLint in the Catalog. * Update the disabled SwiftLint rules. * Reference a local swiftlint.yml symlink. This prevents us from getting warnings about code style violations from the other demos. * Fix SwiftLint violations in the Catalog and Components. * Ignore the `third_party` directory when running the linter. We should not have to deal with warnings in code we may not be able to fix easily. * Integrate SwiftLint into Shrine. Additionally, fix a number of warnings introduced. * Run SwiftLint on Travis. * Enable many of the previously disabled rules and correct them. * Fix control statement violations from SwiftLint.
124 lines
4.5 KiB
Swift
124 lines
4.5 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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import Foundation
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import MaterialComponents.MaterialPageControl
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class PageControlSwiftExampleViewController: UIViewController, UIScrollViewDelegate {
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let pageControl = MDCPageControl()
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let scrollView = UIScrollView()
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let pages = NSMutableArray()
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = UIColor.white
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let pageColors = [
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type(of: self).ColorFromRGB(0x55C4f5),
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type(of: self).ColorFromRGB(0x35B7F3),
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type(of: self).ColorFromRGB(0x1EAAF1),
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type(of: self).ColorFromRGB(0x55C4f5),
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type(of: self).ColorFromRGB(0x35B7F3),
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type(of: self).ColorFromRGB(0x1EAAF1)
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]
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scrollView.frame = self.view.bounds
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scrollView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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scrollView.delegate = self
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scrollView.isPagingEnabled = true
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scrollView.contentSize = CGSize(width: view.bounds.width * CGFloat(pageColors.count), height: view.bounds.height)
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scrollView.showsHorizontalScrollIndicator = false
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view.addSubview(scrollView)
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// Add pages to scrollView.
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for (i, pageColor) in pageColors.enumerated() {
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let pageFrame: CGRect = self.view.bounds.offsetBy(dx: CGFloat(i) * view.bounds.width, dy: 0)
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let page = UILabel.init(frame:pageFrame)
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page.text = String(format: "Page %zd", i + 1)
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page.font = page.font.withSize(50)
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page.textColor = UIColor.init(white: 0, alpha: 0.8)
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page.backgroundColor = pageColor
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page.textAlignment = NSTextAlignment.center
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page.autoresizingMask = [.flexibleTopMargin, .flexibleBottomMargin]
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scrollView.addSubview(page)
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pages.add(page)
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}
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pageControl.numberOfPages = pageColors.count
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let pageControlSize = pageControl.sizeThatFits(view.bounds.size)
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pageControl.frame = CGRect(x: 0, y: view.bounds.height - pageControlSize.height, width: view.bounds.width, height: pageControlSize.height)
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pageControl.addTarget(self, action: #selector(didChangePage), for: .valueChanged)
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pageControl.autoresizingMask = [.flexibleTopMargin, .flexibleWidth]
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view.addSubview(pageControl)
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}
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// MARK: - Frame changes
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override func viewWillLayoutSubviews() {
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super.viewWillLayoutSubviews()
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let pageBeforeFrameChange = pageControl.currentPage
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for (i, page) in pages.enumerated() {
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let pageLabel: UILabel = page as! UILabel
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pageLabel.frame = view.bounds.offsetBy(dx: CGFloat(i) * view.bounds.width, dy: 0)
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}
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scrollView.contentSize = CGSize(width: view.bounds.width * CGFloat(pages.count), height: view.bounds.height)
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var offset = scrollView.contentOffset
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offset.x = CGFloat(pageBeforeFrameChange) * view.bounds.width
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// This non-anmiated change of offset ensures we keep the same page
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scrollView.contentOffset = offset
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}
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// MARK: - UIScrollViewDelegate
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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pageControl.scrollViewDidScroll(scrollView)
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}
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func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
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pageControl.scrollViewDidEndDecelerating(scrollView)
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}
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func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
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pageControl.scrollViewDidEndScrollingAnimation(scrollView)
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}
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// MARK: - User events
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func didChangePage(_ sender: MDCPageControl) {
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var offset = scrollView.contentOffset
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offset.x = CGFloat(sender.currentPage) * scrollView.bounds.size.width
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scrollView.setContentOffset(offset, animated: true)
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}
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// MARK: CatalogByConvention
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class func catalogBreadcrumbs() -> [String] {
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return [ "Page Control", "Swift example"]
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}
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// Creates a UIColor from a 24-bit RGB color encoded as an integer.
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// Pass in hex color values like so: ColorFromRGB(0x1EAAF1).
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class func ColorFromRGB(_ rgbValue: UInt32) -> UIColor {
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return UIColor.init(red: ((CGFloat)((rgbValue & 0xFF0000) >> 16)) / 255,
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green: ((CGFloat)((rgbValue & 0x00FF00) >> 8)) / 255,
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blue: ((CGFloat)((rgbValue & 0x0000FF) >> 0)) / 255,
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alpha: 1)
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}
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}
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