Question

我有UIImageView UILongPressGestureRecognizer，当检测到长按时发送动作。

我确实在UIImageView上启用了用户互动。但是，我还有一种手动滚动，可以使用UIImageView和touchesBegan方法移动touchesMoved。

禁用用户交互时，仅滚动有效。启用用户交互后，只有长按手势识别器才能正常工作。

我怎样才能使两者同时发挥作用？

如有必要，可以共享代码，但我不认为这个问题需要它。

Answer 1

UILongPressGestureRecognizer *gestureRecognizer = [[UILongPressGestureRecognizer alloc] init];
[gestureRecognizer addTarget:self action:@selector(imgLongPressed:)];
gestureRecognizer.delegate = self;
[imgview addGestureRecognizer: gestureRecognizer];

- (void) imgLongPressed:(UILongPressGestureRecognizer*)sender
{
    UIImageView *view_ =(UIImageView*) sender.view;
    CGPoint point = [sender locationInView:view_.superview];

    if (sender.state == UIGestureRecognizerStateBegan)
    {

    }
    else if (sender.state == UIGestureRecognizerStateChanged)
    {

    }
    else if (sender.state == UIGestureRecognizerStateEnded)
    {

    }

}

Answer 2

手势识别器始终优先并覆盖touchesBegan:样式事件。您必须使用相同的API /技术实现这两种行为。

Answer 3

首先，你必须使用手势来移动图像，如下所示。

 UIPanGestureRecognizer  *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[vwBigImage addGestureRecognizer:panRecognizer];

将被调用的函数如下所示..

 -(void)move:(id)sender {

CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:yourview];

if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
    _firstX = [yourimageview center].x;//declare CGFloat _firstX; in .h file

    _firstY = [yourimageview center].y;//declare CGFloat _firstY; in .h file
}

translatedPoint = CGPointMake(_firstX+translatedPoint.x, _firstY+translatedPoint.y);
[yourimageview setCenter:translatedPoint];

}

现在你的两个手势都会被召唤。

让我知道它的工作与否!!!

快乐编码!!!!

长按手势和uiimageview的运动？

3 个答案: