如何以編程方式刪除UIImageView通過touchGesture

Question

好吧，所以我一直在尋找如何使用UITouchGestures與UIImageViews去除視圖，但一切都沒有意義或不工作，所以我最終決定問這個問題。如何使用UITapGestureRecognizer刪除一個UIImageView，當它被點擊時？

這是我的.m：

 - (void)viewDidLoad 
{ 

[super viewDidLoad]; 


//this makes a zombie/person 
UIImageView *ZombieView =[[UIImageView alloc] initWithFrame: CGRectMake(135 , -100, 50, 75)]; 
UIImage *Zombie=[UIImage imageNamed:@"free-vector-stick-figure-clip-art_105575_Stick_Figure_clip_art_hight.png"]; 
[ZombieView setImage:Zombie]; 
//[self.view addSubview:ZombieView]; 
[self.view insertSubview:ZombieView belowSubview:_Railing]; 
[ZombieView setUserInteractionEnabled:TRUE]; 

// double tap gesture recognizer 
UITapGestureRecognizer *Touch2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped2:)]; 
[Touch2 setDelegate: self]; 
[Touch2 setNumberOfTapsRequired: 2]; 
[_ZombieView addGestureRecognizer:Touch2]; 


UITapGestureRecognizer *Touch = [[UITapGestureRecognizer alloc] initWithTarget:ZombieView action:@selector(tapped:)]; 
[Touch setDelegate:self]; 
[Touch setNumberOfTapsRequired: 1]; 
[Touch requireGestureRecognizerToFail: Touch2]; 
[_ZombieView addGestureRecognizer:Touch]; 

//This makes the Person move down until he is behind the railing 
[UIView animateWithDuration:7.5 
        delay:0.0 
        options: UIViewAnimationOptionCurveLinear 
        animations:^{ 
        CGAffineTransform trans = CGAffineTransformTranslate(ZombieView.transform, 0, 420); 
         ZombieView.transform=trans; 
        } 
       completion:nil];} 

-(void) tapped:(UITapGestureRecognizer *)recognizer{ 
[_ZombieView removeFromSuperview]; 
} 

-(void) tapped2:(UITapGestureRecognizer *)recognizer{ 
} 

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

@end 

我知道那一定是一場災難，但我相當的新本，所以請記住這一點。我只需要知道如何使用輕觸識別器以及如何刪除UIImageView，但其他技巧值得讚賞。謝謝！

這是我的編輯代碼：

@interface AbcViewController() 

@end 

@implementation AbcViewController 




- (void)viewDidLoad 
{ 

[super viewDidLoad]; 



//this makes a zombie/person 
UIImageView *zombieView =[[UIImageView alloc] initWithFrame: CGRectMake(135 , -100, 50, 75)]; 
UIImage *zombie=[UIImage imageNamed:@"free-vector-stick-figure-clip-art_105575_Stick_Figure_clip_art_hight.png"]; 
[zombieView setImage:zombie]; 
//[self.view addSubview:zombieView]; 
[self.view insertSubview:zombieView belowSubview:_Railing]; 
[zombieView setUserInteractionEnabled:TRUE]; 

//This makes the Person move down until he is behind the railing 
[UIView animateWithDuration:7.5 
        delay:0.0 
        options: UIViewAnimationOptionCurveLinear 
        animations:^{ 
        CGAffineTransform trans = CGAffineTransformTranslate(zombieView.transform, 0, 420); 
         zombieView.transform=trans; 
        } 
       completion:nil]; 


// double tap gesture recognizer 
UITapGestureRecognizer *touch2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped2:)]; 
[touch2 setDelegate: self]; 
[touch2 setNumberOfTapsRequired: 2]; 
[zombieView addGestureRecognizer:touch2]; 


UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:zombieView action:@selector(tapped:)]; 
[touch setDelegate:self]; 
[touch setNumberOfTapsRequired: 1]; 
[touch requireGestureRecognizerToFail: touch2]; 
    [zombieView addGestureRecognizer:touch]; 


} 

-(void) tapped:(UITapGestureRecognizer *)recognizer{ 
    [recognizer.view removeFromSuperview]; 
} 

-(void) tapped2:(UITapGestureRecognizer *)recognizer{ 

[recognizer.view removeFromSuperview]; 
} 



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

} 

@end 

Answer 1

敲擊手勢識別有一個指向它的連接到視圖的視圖屬性。因此，在識別器的操作方法，用它自己從它的父刪除，

-(void) tapped:(UITapGestureRecognizer *)recognizer{ 
[recognizer.view removeFromSuperview]; 
} 

這很難說，爲什麼你的方法是行不通的。這可能是因爲_ZombieView是零（我沒有看到你實際創建_ZombieView的地方，而不是你創建的ZombieView）。順便說一句，你應該用小寫字母開始你的財產和變量名稱，以符合通常的Objective-C命名約定。