material-components_material-components-ios/components/TextFields/examples/TextFieldsTableViewExample.m

/*
 Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "MaterialTextFields.h"

static NSString *const TSTTextFieldTableViewCellIdentifier = @"TSTTextFieldsTableViewExampleCell";

@interface TextFieldTableViewCell : UITableViewCell

@property(nonatomic, strong) MDCTextField *textField;
@property(nonatomic, strong) MDCTextInputControllerFilled *textFieldController;

@end

@interface TextFieldsTableViewExample : UIViewController <UITableViewDataSource, UITextFieldDelegate>

@property(nonatomic, strong) NSMutableArray <NSString *> *strings;
@property(nonatomic, strong) UITableView *tableView;

@end

@implementation TextFieldsTableViewExample

- (void)viewDidLoad {
  [super viewDidLoad];

  self.tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
  self.tableView.rowHeight = UITableViewAutomaticDimension;
  self.tableView.estimatedRowHeight = 82.f;
  self.tableView.dataSource = self;
  [self.tableView registerClass:[TextFieldTableViewCell class] forCellReuseIdentifier:TSTTextFieldTableViewCellIdentifier];

  self.tableView.translatesAutoresizingMaskIntoConstraints = NO;
  [self.view addSubview:self.tableView];

  [self.tableView setContentInset:UIEdgeInsetsMake(20, 0, 0, -20)];
  [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];

#if defined(__IPHONE_11_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_11_0)
  if (@available(iOS 11.0, *)) {
    [self.tableView.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor].active = YES;
  } else {
    [self.tableView.topAnchor constraintEqualToAnchor:self.topLayoutGuide.bottomAnchor].active = YES;
  }
#else
  [self.tableView.topAnchor constraintEqualToAnchor:self.topLayoutGuide.bottomAnchor].active = YES;
#endif

  [self.tableView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor].active = YES;

  [self.tableView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor].active = YES;
  [self.tableView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor].active = YES;

  [self setupDataModel];
}

#pragma mark - UITableViewDataSource

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:TSTTextFieldTableViewCellIdentifier];
  if ([cell isKindOfClass:[TextFieldTableViewCell class]]) {
    TextFieldTableViewCell *textFieldCell = (TextFieldTableViewCell*)cell;

    textFieldCell.textField.tag = indexPath.row;
    textFieldCell.textField.delegate = self;

    if (indexPath.row < (NSInteger)self.strings.count) {
      NSString *string = self.strings[indexPath.row];
      textFieldCell.textFieldController.textInput.text = string;
    }
    textFieldCell.textFieldController.placeholderText = [NSString stringWithFormat:@"TextField #%lu", (long)indexPath.row];
  }

  return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
  return 20;
}

#pragma mark - UITextFieldDelegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
  [textField resignFirstResponder];

  return NO;
}

- (void)textFieldDidEndEditing:(UITextField *)textField {
  self.strings[textField.tag] = textField.text ?: @"";
}

#pragma mark - Example Data

- (void)setupDataModel {
  self.strings = [NSMutableArray array];
  for (int i = 0; i < 20; ++i) {
    [self.strings addObject:@""];
  }
}

@end

@implementation TextFieldsTableViewExample (CatalogByConvention)

+ (NSArray *)catalogBreadcrumbs {
  return @[ @"Text Field", @"Table View" ];
}

+ (BOOL)catalogIsPrimaryDemo {
  return NO;
}

+ (BOOL)catalogIsPresentable {
  return NO;
}

@end

@implementation TextFieldTableViewCell

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
  self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
  if (self) {
    self.textField = [[MDCTextField alloc] initWithFrame:CGRectZero];
    self.textField.translatesAutoresizingMaskIntoConstraints = NO;
    [self addSubview:self.textField];

    [self.textField.topAnchor constraintEqualToAnchor:self.topAnchor].active = YES;
    [self.textField.bottomAnchor constraintEqualToAnchor:self.bottomAnchor].active = YES;
    [self.textField.leadingAnchor constraintEqualToAnchor:self.leadingAnchor constant:8].active = YES;
    [self.textField.trailingAnchor constraintEqualToAnchor:self.trailingAnchor constant:-8].active = YES;

    _textFieldController = [[MDCTextInputControllerFilled alloc] initWithTextInput:self.textField];
  }
  return self;
}

@end