なぜ私のビューはUIPanGestureRecognizerを認識できないのですか？

Question

画像にタグを付けると表示されることはありませんか？どうして？

Answer 1

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    _view2 = [[V0 alloc ]initWithFrame:self.view.bounds]; 
    CGRect a = self.view2.frame; 
    a.origin.x = 100; 
    a.origin.y = 150; 
    _view2.frame = a; 
    _view2.userInteractionEnabled = YES; 

    [self.view2 addGestureRecognizer:[[UIPanGestureRecognizer alloc]initWithTarget:self.view2 action:@selector(Up:)]]; 

私はinitWithFrameが、その後、私の見解は、私のジェスチャーを認識することができます追加

Answer 2

userInteractionEnabledプロパティのデフォルト値はUIImageViewクラスにNOに設定されています。たぶんそれはあなたの問題です。

From UIImageView Reference:

このプロパティは、UIViewの親クラスから継承されます。このクラスは、このプロパティのデフォルト値をNOに変更します。

は、このフラグメントのコードでチェック：

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:self.view.bounds]; 
    [self.view addSubview:imageView]; 

    imageView.userInteractionEnabled = YES; 

    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureRecognized:)]; 
    [imageView addGestureRecognizer:panGesture]; 
} 

- (void)panGestureRecognized:(UIGestureRecognizer *)gestureRecognizer { 
    NSLog(@"It Works!"); 
} 

Answer 3

このコードを適用してうまく働い：

-(void)initialization 
UIPanGestureRecognizer *panRecognizer = [[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)] autorelease]; 
    [panRecognizer setMinimumNumberOfTouches:1]; 
    [panRecognizer setMaximumNumberOfTouches:1]; 
    [panRecognizer setDelegate:self]; 
    [imageview addGestureRecognizer:panRecognizer]; 
    imageview.userInteractionEnabled = YES; 
} 
- (void)move:(UIPanGestureRecognizer *)gestureRecognizer 
{ 
    UIView *piece = imageview; 

    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer]; 

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) { 
     CGPoint translation = [gestureRecognizer translationInView:[piece superview]]; 
     CGPoint translatedCenter = CGPointMake([piece center].x + translation.x, [piece center].y + translation.y); 
     CGPoint center = [self centerWithBounds:translatedCenter andViewFrame:[piece frame] andBoundingFrame:[[piece superview] frame]]; 
     [piece setCenter:center]; 
     [gestureRecognizer setTranslation:CGPointZero inView:[piece superview]]; 
    } 
}