UIButton 详解

 1 UIButton *bt = [UIButton buttonWithType:UIButtonTypeContactAdd];// UIButtonTypeCustom, UIButtonTypeRoundedRect; //
 2     [bt setTitle:@"myButton" forState:UIControlStateNormal];        // 普通状态
 3     [bt setTitle:@"Button1" forState:UIControlStateHighlighted];    // 触摸时
 4     [bt setTitle:@"disButton" forState:UIControlStateDisabled];     // 无效时
 5     [bt setTitleColor:[UIColor redColor] forState:UIControlStateNormal];    // 普通状态下的字体颜色
 6     
 7     bt.titleLabel.font = [UIFont boldSystemFontOfSize:24];  // 按钮字体
 8     bt.titleLabel.shadowOffset = CGSizeMake(1, 1);
 9     bt.titleLabel.shadowColor = [UIColor redColor];
10     
11     
12     [bt setImage:[UIImage imageNamed:@"normal.png"] forState:UIControlStateNormal];
13     // 普通状态下图片，只在UIButtonTypeCustom，UIButtonTypeRoundedRect下有效
14     [bt setBackgroundImage:[UIImage imageNamed:@"background.png"] forState:UIControlStateNormal]; // 设置背景图
15     
16     UIEdgeInsets insets;    // 设置按钮内部图片间距
17     insets.top = insets.bottom = insets.right = insets.left = 10;
18     bt.contentEdgeInsets = insets;
19     
20     bt.titleEdgeInsets = insets;    // 标题间距
21     
22     [bt addTarget:self
23            action:@selector(click:)
24  forControlEvents:UIControlEventTouchUpInside]; // 添加事件响应