block使用场景(2)-传值

1.在PickViewController.h中声明block 属性

@property (nonatomic,strong) void(^block)(NSString *value);

2.在PickViewController.m中调用block

if (_block) {

_block(self.strdata0);

}

3.在ViewController.m中调用block方法

pickVC.block =^(NSString*value){

NSLog(@"%@",value);

};

完整代码见https://github.com/youweikang/block-2---.git