如何添加触摸和检测视图上的UIImageView所以我可以移动它而不是在它上面添加一个？ [英] how to add on touch and detect UIImageView on view so i could move it around and not adding one on top of it?

问题描述

我想知道你们是否有一个示例代码添加并在触摸时移动UIImageView并检测是否有UIImageView，所以我无法在其上添加UIImageView。

i wonder if you guys have a sample code adding and move UIImageView on touch and also detect if there is an UIImageView there so i can't add UIImageView on top of it.

编辑：更清晰的问题
1.我想在触摸视图时添加一个杯子（UIImageView）但是不要将杯子（UIImageView）放到堆叠中。

clearer question 1. i wanna add an cups(UIImageView) when i touch the view but do not wan the cup(UIImageView) to stack.

1. 我想移动UIImageView但是如果那里有UIImageView那么它会弹回到原来的位置，所以它不会在那里堆叠UIImageView。

感谢您阅读我的问题并感谢您的帮助

thanks for reading my question and appreciated your helps

欢呼

des

推荐答案

这应该让你去......

This should let you going…

在头文件中创建两个ivars：

Create two ivars in your header file:

UIImageView *myImageView1;
UIImageView *myImageView2;

接下来的两种方法将在您的实施文件中：

The next two methods will be in your implementation file:

-(void)initImagesAndPanGesture
{
    UIImage *img = [UIImage imageNamed:@"image1.png"];
    myImageView1 = [[UIImageView alloc]initWithImage:img];
    [myImageView1 setFrame:CGRectMake(300, 800, 100, 100)];
    [myImageView1 setUserInteractionEnabled:YES];
    UIPanGestureRecognizer *recognizer1 = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan1:)];
    [myImageView1 addGestureRecognizer:recognizer1];
    [self.view addSubview:myImageView1];

    img = [UIImage imageNamed:@"image2.png"];
    myImageView2 = [[UIImageView alloc]initWithImage:img];
    [myImageView2 setFrame:CGRectMake(500, 800, 100, 100)];
    [myImageView2 setUserInteractionEnabled:YES];
    recognizer1 = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan1:)];
    [myImageView2 addGestureRecognizer:recognizer1];
    [self.view addSubview:myImageView2];
}

-(void)handlePan1:(UIPanGestureRecognizer *)recognizer
{
    if (!(CGRectIntersectsRect(myImageView1.frame, myImageView2.frame)))
    {
        CGPoint translation = [recognizer translationInView:self.view];
        recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, 
                                         recognizer.view.center.y + translation.y);

        [recognizer setTranslation:CGPointMake(0, 0) inView:self.view];
    }
    else 
    {
        NSLog(@"intersect!");
    }
}

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