可以自定义，实现了block，delegate回调 自定义属性有： @property (nonatomic , strong) NSArray *btnTitleArray; @property (nonatomic , strong) UIColor *btnTitleNormalColor; @property (nonatomic , strong) UIColor *btnTitleSelectColor; @property (nonatomic , strong) UIColor *btnBackgroundNormalColor; @property (nonatom