Question

我对Objective-C很新，我希望创建一个相当简单的Jigsaw。我现在只是想制作一个4件式拼图作为学习该方法的一种方式。

目前我在屏幕周围放置了4块，当它们拖到屏幕上的特定位置时，会对齐到那个地方。

我的问题是试图为触摸设置动画。我希望触摸的图像扩展一点但我的语法有问题。我看过Apple提供的MoveMe示例，但在这种情况下它并没有帮助我。下面是代码。我很感激任何帮助。感谢。

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    //location of current touch
    CGPoint location = [touch locationInView:self.view];
    if ([touch view] == image1) {
        image1.center = location;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.5];
        image1.transform = CGAffineTransformMakeScale(1.5, 1.5);  
        [UIView commitAnimations];    
    } else if ([touch view] == image2) {
        image2.center = location;
        animateFirstTouch:image2;
    } else if ([touch view] == image3) {
        image3.center = location;
        image3.transform = CGAffineTransformMakeScale(1.5, 1.5);
    } else if ([touch view] == image4) {
        image4.center = location;
        image4.transform = CGAffineTransformMakeScale(1.5, 1.5);
    }

}

-(void) animateFirstTouch:(UIView *)image {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    self.view.transform = CGAffineTransformMakeScale(1.5, 1.5);  
    [UIView commitAnimations];  
}

image1的代码有效，图像按比例放大0.5秒。

image2的代码抛出一个错误：表达结果未用于animateFirstTouch：image2。

image3和image4的代码在没有动画的情况下放大图像。

Answer 1

请参阅此链接中的 Kuldeep 的回答。我认为这对你有用：

iPhone/iOS: How to implement Drag and Drop for subviews of a Scrollview?

此外，另请参阅此链接中 iPhone 的答案：

iPhone App: implementation of Drag and drop images in UIView

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    //location of current touch
    CGPoint location = [touch locationInView:self.view];
    if ([touch view] == image1) {
       [self animateFirstTouch:image1 withLocation:location];
    } else if ([touch view] == image2) {
       [self animateFirstTouch:image2 withLocation:location];
    } else if ([touch view] == image3) {
       [self animateFirstTouch:image3 withLocation:location];
    } else if ([touch view] == image4) {
        [self animateFirstTouch:image4 withLocation:location];
    }

}

-(void) animateFirstTouch:(UIImageView *)image withLocation:(CGPoint)location {
        image.center = location;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.5];
        image.transform = CGAffineTransformMakeScale(1.5, 1.5);  
        [UIView commitAnimations];   
}

希望这会对你有所帮助。

如果您需要更多帮助，请与我联系。

“拖动”和“删除”游戏动画

1 个答案: