EditTextTableViewCell.m

/*
 Custom table cell with edit text field
 
 Copyright 2013 Thincast Technologies GmbH, Author: Martin Fleisz
 
 This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
 If a copy of the MPL was not distributed with this file, You can obtain one at
 http://mozilla.org/MPL/2.0/.
 */
 
#import "EditTextTableViewCell.h"
 
@implementation EditTextTableViewCell
 
@synthesize label = _label, textfield = _textfield, enabled = _enabled;
 
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
  self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
  if (self)
  {
    // Initialization code
    [self setSelectionStyle:UITableViewCellSelectionStyleNone];
 
    _label = [[UILabel alloc] init];
    [_label setFont:[UIFont preferredFontForTextStyle:UIFontTextStyleBody]];
    [_label setAdjustsFontForContentSizeCategory:YES];
    [_label setTranslatesAutoresizingMaskIntoConstraints:NO];
    [_label setContentHuggingPriority:UILayoutPriorityRequired
                              forAxis:UILayoutConstraintAxisHorizontal];
    [_label setContentCompressionResistancePriority:UILayoutPriorityRequired
                                            forAxis:UILayoutConstraintAxisHorizontal];
 
    // right editable field
    _textfield = [[UITextField alloc] init];
    [_textfield setFont:[UIFont preferredFontForTextStyle:UIFontTextStyleBody]];
    [_textfield setAdjustsFontForContentSizeCategory:YES];
    [_textfield setTextAlignment:NSTextAlignmentRight];
    [_textfield setClearButtonMode:UITextFieldViewModeWhileEditing];
    [_textfield setAutocorrectionType:UITextAutocorrectionTypeNo];
    [_textfield setAutocapitalizationType:UITextAutocapitalizationTypeNone];
    [_textfield setSpellCheckingType:UITextSpellCheckingTypeNo];
    [_textfield setTranslatesAutoresizingMaskIntoConstraints:NO];
 
    UIView *content = [self contentView];
    [content addSubview:_label];
    [content addSubview:_textfield];
 
    UILayoutGuide *margins = [content layoutMarginsGuide];
    [NSLayoutConstraint activateConstraints:@[
      [[_label leadingAnchor] constraintEqualToAnchor:[margins leadingAnchor]],
      [[_label topAnchor] constraintGreaterThanOrEqualToAnchor:[margins topAnchor]],
      [[_label bottomAnchor] constraintLessThanOrEqualToAnchor:[margins bottomAnchor]],
      [[_label centerYAnchor] constraintEqualToAnchor:[margins centerYAnchor]],
      [[_textfield leadingAnchor]
          constraintEqualToSystemSpacingAfterAnchor:[_label trailingAnchor]
                                         multiplier:1.0],
      [[_textfield trailingAnchor] constraintEqualToAnchor:[margins trailingAnchor]],
      [[_textfield topAnchor] constraintGreaterThanOrEqualToAnchor:[margins topAnchor]],
      [[_textfield bottomAnchor] constraintLessThanOrEqualToAnchor:[margins bottomAnchor]],
      [[_textfield centerYAnchor] constraintEqualToAnchor:[margins centerYAnchor]]
    ]];
 
    [self setEnabled:YES];
  }
  return self;
}
 
- (void)dealloc
{
  [_label release];
  [_textfield release];
  [super dealloc];
}
 
- (void)prepareForReuse
{
  [super prepareForReuse];
 
  [_textfield setKeyboardType:UIKeyboardTypeDefault];
  [self setEnabled:YES];
}
 
- (void)setEnabled:(BOOL)enabled
{
  _enabled = enabled;
 
  // if 'disabled' set grayed out color
  [_label setTextColor:enabled ? [UIColor labelColor] : [UIColor tertiaryLabelColor]];
  [_textfield
      setTextColor:enabled ? [UIColor secondaryLabelColor] : [UIColor tertiaryLabelColor]];
  [_textfield setEnabled:enabled];
}
 
@end