iOS--UIButton的使用方法

//初始化时设置Button样式，个人喜欢用圆角样式
UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
//UIButton的几种样式
//typedef NS_ENUM(NSInteger, UIButtonType) {
//    UIButtonTypeCustom = 0,                         // //no button type
//    UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),  // //standard system button
//    UIButtonTypeDetailDisclosure,
//    UIButtonTypeInfoLight,
//    UIButtonTypeInfoDark,
//    UIButtonTypeContactAdd,
//    UIButtonTypeRoundedRect = UIButtonTypeSystem,   // //Deprecated, use UIButtonTypeSystem instead
//};
//设置button的位置和大小
button.frame = CGRectMake(50, 50, 100, 30);
//设置button背景色
button.backgroundColor = [UIColor magentaColor];
//设置在什么状态下显示什么文字
[button setTitle:@"按钮" forState:UIControlStateNormal];
//设置在什么状态下字体什么颜色
[button setTitleColor:[UIColor cyanColor] forState:UIControlStateNormal];
//设置背景图片
[button setBackgroundImage:[UIImage imageNamed:@"image.jpg"] forState:UIControlStateNormal];
//UIControlState的样式
//    typedef NS_OPTIONS(NSUInteger, UIControlState) {
//        UIControlStateNormal       = 0,
//        UIControlStateHighlighted  = 1 << 0,                  // used when UIControl isHighlighted is set
//        UIControlStateDisabled     = 1 << 1,
//        UIControlStateSelected     = 1 << 2,                  // flag usable by app (see below)
//        UIControlStateApplication  = 0x00FF0000,              // additional flags available for application use
//        UIControlStateReserved     = 0xFF000000               // flags reserved for internal framework use
//    };
//给button添加响应事件
[button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
//添加到view
[self.view addSubview:button];

//button的响应事件
- (void)buttonAction:(UIButton*)sender {
NSLog(@"Hello world");
}