block初级使用

MainView.h

//typedef 这个是重新定义，typeof是求类型

typedef void (^RegisterBlock)(NSString*);

//定义block

@property (nonatomic,strong) RegisterBlock registerBlock;

MainView.m

有：按钮的触发时间，设置相应的block

    [_serviceLeft addTarget:self action:@selector(reSetPassword) forControlEvents:UIControlEventTouchUpInside];
    
  
}


- (void)reSetPassword
{
    self.registerBlock(@"ok");
}

@interface RegisterViewController ()
@property (nonatomic,strong) RegisterView *registerView;
@end

@implementation RegisterViewController
#pragma mark 构造函数

- (id)registerView
{
    if (!_registerView) {
        _registerView = [[RegisterView alloc]init];
    }
    return _registerView;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    self.view = self.registerView;
    
    _registerView.registerBlock = ^(NSString * str){
        NSLog(@"str is : %@",str);
    };
}

block初级使用

原文：http://blog.csdn.net/u012496940/article/details/47298909