block

vc2中：头文件

1 

typedef void(^attentionBlock)(id sender);

2 

@property (nonatomic,copy) attentionBlock attentionblock;

3 

- (void)attentionwithBlock:(attentionBlock)block;

.m中

4 实现方法

- (void)attentionwithBlock:(attentionBlock)block{

    self.attentionblock = block;

}

5 按钮点击事件

- (void)attentionSelect{

    self.attentionblock(_indexPathCell);

  }

vc1中

6

[vc2 attentionwithBlock:^(id obj) {

        

    }];