iOS_链式编程2

骄傲使人落后，房价使人虚心进步。

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本文主要在上文的基础上进行拓展，在链式属性的基础上实现链式Block

使用效果是这样滴，有没有一点小心动。

_person.leftHook(^(NSString *attackName){
        NSLog(@"先来%@",attackName);
    }).rightHook(^(NSString *attackName){
        NSLog(@"再来%@",attackName);
    });

区别在于Block的参数也是一个Block（就这么一点点区别 (T^T) ），直接贴代码.

Person.h

@class Person;

// 攻击回调Block
typedef void(^AttackCallBackBlock)(NSString *attackName);
// 攻击
typedef Person *(^AttackBlock)(AttackCallBackBlock callBackBlock);

@interface Person : NSObject

@property (nonatomic ,strong) AttackBlock leftHook;
@property (nonatomic ,strong) AttackBlock rightHook;

- (void)initial;
- (void)launchLeftHookAction;
- (void)launchRightHookAction;

@end

Person.m

@interface Person ()
@property (nonatomic ,copy) AttackCallBackBlock leftHookCallBack;
@property (nonatomic ,copy) AttackCallBackBlock rightHookCallBack;

@end

@implementation Person

#pragma mark - PublicMethod
- (void)initial{
    __weak Person *weakSelf = self;
    self.leftHook = ^(AttackCallBackBlock callBackBlock){
        weakSelf.leftHookCallBack = callBackBlock;
        return weakSelf;
    };

    self.rightHook = ^(AttackCallBackBlock callBackBlock){
        weakSelf.rightHookCallBack = callBackBlock;
        return weakSelf;
    };

}


- (void)launchLeftHookAction{
    _leftHookCallBack(@"发动一记左勾拳");
}

- (void)launchRightHookAction{
    _rightHookCallBack(@"发动一记右勾拳");
}

@end

调用，这里是拖了2个Button去调用Person里面的两个开放的方法，分别发动左勾拳和右勾拳。

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    _person = [[Person alloc] init];
    [_person initial];

    _person.leftHook(^(NSString *attackName){
        NSLog(@"先来%@",attackName);
    }).rightHook(^(NSString *attackName){
        NSLog(@"再来%@",attackName);
    });
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - IBAction
- (IBAction)action1:(id)sender {
    [_person launchLeftHookAction];
}

- (IBAction)action2:(id)sender {
    [_person launchRightHookAction];
}

@end

效果如下:

最后说下对这种写法的缺点，代码补全有点不友好，部分要自己手写，不知道有没有办法可以完善一下，目前已知swift是可以实现自动补全的。

全部代码在这里