iOS 用keypath设置一些属性

1.UIButton title 距左边显

button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

  

  

2.UITextField placeholder 颜色

方法一:

textField.placeholder = @"this is placeholder";  
[textFieldsetValue:[UIColor redColor]forKeyPath:@"_placeholderLabel.textColor"];  
[textFieldsetValue:[UIFontboldSystemFontOfSize:16]forKeyPath:@"_placeholderLabel.font"]; 

  

方法二:(iOS 6 之后)

NSMutableAttributedString *placeholder = [[NSMutableAttributedString alloc]initWithString:@"this is placeholder"];

[placeholderaddAttribute:NSForegroundColorAttributeName
                  value:[UIColor redColor]
                  range:NSMakeRange(0, placeholder.length)];

[placeholderaddAttribute:NSFontAttributeName
                  value:[UIFontboldSystemFontOfSize:14]
                  range:NSMakeRange(0, placeholder.length)];


textField.attributedPlaceholder = placeholder;

 

3.隐藏 tabBar 顶部的分割线

[self.tabBar setValue:@(YES) forKeyPath:@"_hidesShadow"];

  

  

posted on 2015-06-09 21:00  iRemark  阅读(656)  评论(0编辑  收藏  举报

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