尝试移动UIImageView，移动整个屏幕视图

Question

我希望我的UIViewImages可以通过触摸移动。 我正在尝试使用在ViewController中实现的代码：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    if ([touches count]==1) {
        UITouch *touch = [touches anyObject];
        CGPoint p0 = [touch previousLocationInView:self.view];
        CGPoint p1 = [touch locationInView:self.view];
        CGPoint center = self.view.center;
        center.x += p1.x - p0.x;
        center.y += p1.y - p0.y;
        self.view.center = center;
    }
}

当我尝试拖动UIImageView时，正在拖动整个屏幕，这是不正确的。 需要帮忙！

卡罗尔

Answer 1

您创建一个手势识别器，并将其添加到这样的视图中：

UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(gestureRecognizerMethod:)];
[self.imageView addGestureRecognizer:panGestureRecognizer];

您可以调整图像视图的位置

- (void)gestureRecognizerMethod:(UIPanGestureRecognizer *)recogniser
{
    if (recognizer.state == UIGestureRecognizerStateBegan || recognizer.state == UIGestureRecognizerStateChanged)
    {
        CGPoint touchLocation = [recognizer locationInView:self.view];
        self.imageView.center = touchLocation;
    }
}

阅读这篇文章。

Answer 2

如果我正确阅读了您的代码，则self.view实际上是整个屏幕。 也许您是说self.yourImageView吗？