仿新浪微博自定义的ActionSheet， 代码炒鸡简单易用.
两行代码即可集成，采用Block进行回调
- (void)show;
- (void)hide;
/**
* 数据源
*/
@property (nonatomic, strong) NSArray *dataSource;
/**
* actionSheet 点击回调
*/
@property (nonatomic, copy)BTActionSheetDidSelectViewBlock selectRowBlock;