协议、代理

1、设置协议

@protocol DefaultPickerViewDelegate <NSObject>

- (void)cancel;
- (void)sureButtonDelegateFunction:(id)sender;

@end


2、设置代理属性
@property (nonatomic, weak) id<DefaultPickerViewDelegate> delegate; /**< 代理 */


3、在某个事件中调用，需要判断
if (self.delegate && [self.delegate respondsToSelector:@selector(PWSCalendar:didSelecteDate:)]
) {
        [self.delegate sureButtonDelegateFunction:self];
    }