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我有 100 张图片（a400e3x_0.png，.....，a400e3x_98.png，a400e3x_99.png）。这些图像根据 UIImageView 上的滑动而变化，就像用户可以控制的动画一样。问题是当用户停止平移然后重新开始时，动画会回到图像 0。我需要保存用户停止平移时的位置，我可以做到。但是当我添加它时，添加总是存在的。示例：我在图像 16 处停止平移，然后从 16 重新开始，当 (curX%100) 为零时，它仍然始终添加 16。你能帮我解决这个问题吗？

- (IBAction)PanGesAction:(id)sender
{
 CGPoint translation = [_PanGes translationInView:self.view];
 int curX = (int)translation.x;
 addition = (curX%100)+Savedif;

 NSLog(@"%d", addition);

 [_ImageV2 setImage:[UIImage imageNamed:[NSString stringWithFormat:@"a400e3x_%d.png", addition]]];


    if (_PanGes.state == UIGestureRecognizerStateEnded)
    {
        NSLog(@"End");
        Savedif = addition;
        //When user end

    }

    if (_PanGes.state == UIGestureRecognizerStateBegan)
    {
        NSLog(@"Began");
         //When user begin

    }
}
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2 回答 2

1

当新手势开始时，您有机会编辑它将发送给您的值，因此我们可以将您的起始值转移到手势并保持简单：

- (IBAction)PanGesAction:(id)sender
{
    if (_PanGes.state == UIGestureRecognizerStateBegan)
    {
        NSLog(@"Began");
        //When user begin
        [_PanGes setTranslation:(CGPoint){Savedif, 0} inView:self.view];
        Savedif = 0;
    }

    CGPoint translation = [_PanGes translationInView:self.view];
    int curX = (int)translation.x;
    addition = (curX%100);

    NSLog(@"%d", addition);

    [_ImageV2 setImage:[UIImage imageNamed:[NSString stringWithFormat:@"a400e3x_%d.png", addition]]];


    if (_PanGes.state == UIGestureRecognizerStateEnded)
    {
        NSLog(@"End");
        Savedif = addition;
        //When user end
    }
}
于 2013-09-22T13:24:23.537 回答
-1

有一种方法，你不必保存任何东西，

介绍该transform物业UIView，

试试这个代码：

- (void)handlePanGesture:(UIPanGestureRecognizer *)gesture
{
    UIView *imageView = gesture.view;
    if (gesture.state == UIGestureRecognizerStateChanged) {
        CGPoint transition = [gesture translationInView:gesture.view];
        imageView.transform = CGAffineTransformMakeTranslation(imageView.transform.tx + transition.x, imageView.transform.tx + transition.y);
        [gesture setTranslation:CGPointZero inView:gesture.view];
    }
    else if (gesture.state == UIGestureRecognizerStateEnded) {
        imageView.center = CGPointMake(imageView.center.x + imageView.transform.tx, imageView.center.y + imageView.transform.ty);
        imageView.transform = CGAffineTransformIdentity;
    }
}

imageView 的位置始终是：

imageView.center.x+image.transform.tx
imageView.center.y+image.transform.ty

您可以据此采取行动。

于 2013-09-22T13:27:48.010 回答