UIButton

#pragma mark - 创建一个UIButton对象
    UIButton *button = [UIButton buttonWithType:(UIButtonTypeSystem)];
    button.frame = CGRectMake(100, 100, 100, 100);
    button.backgroundColor = [UIColor redColor];
    [self.view addSubview:button];
#pragma mark - 添加事件
    [button addTarget:self action:@selector(ButtonClick) forControlEvents:(UIControlEventTouchUpInside)];
#pragma mark - 移除事件
    //[button removeTarget:self action:@selector(ButtonClick) forControlEvents:(UIControlEventTouchUpInside)];
#pragma mark - 外观控制
    //设置指定状态下的标题
    //[button setTitle:@"点击" forState:(UIControlStateNormal)];
    //获取指定状态下的标题
    NSString *str = [button titleForState:(UIControlStateNormal)];
    //设置指定状态下的标题颜色
    [button setTitleColor:[UIColor blackColor] forState:(UIControlStateNormal)];
    //获取指定状态下得标题颜色
    UIColor *color = [button titleColorForState:(UIControlStateNormal)];
    //设置指定状态下得标题阴影颜色
    [button setTitleShadowColor:[UIColor whiteColor] forState:(UIControlStateNormal)];
    //获取指定状态下得标题阴影颜色
    UIColor *shadowColor = [button titleShadowColorForState:(UIControlStateNormal)];
    //设置指定状态下得前景图片
    [button setImage:[UIImage imageNamed:@"1.png"] forState:(UIControlStateNormal)];
    //获取指定状态下的前景图片
    UIImage *image = [button imageForState:(UIControlStateNormal)];
    //设置指定状态下的背景图片
    [button setBackgroundImage:[UIImage imageNamed:@"1.png"] forState:(UIControlStateNormal)];
    //获取指定状态下得背景图片
    UIImage *bgImage = [button backgroundImageForState:(UIControlStateNormal)];