未调用UIPinchGestureRecognizer

Question

当我这样做时，我真的不确定为什么目标没有被调用：

 UIImage * imgSrc = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:imageSource]]];
            UIImageView * imgView = [[[UIImageView alloc] initWithImage:imgSrc] retain];

            UIPinchGestureRecognizer * pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(resizeImage:)];
            [imgView addGestureRecognizer:pinchGestureRecognizer]; 
            [pinchGestureRecognizer release];

- (IBAction)resizeImage:(UIPinchGestureRecognizer *)sender
{
   //not getting here
}

未调用调整大小的图像。图像显示得很好

Answer 1

您需要设置imgView.userInteractionEnabled = YES。它默认为"NO“。