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我在特定位置有一个图像视图,我知道该位置,但我想检查该位置是否有一个图像视图。

请帮我解决

4

4 回答 4

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Here is a helper method to check if two rects overlap:

-(BOOL) rect:(CGRect)rect overlap:(CGRect)anotherRect
{
    BOOL xOverlap = ((rect.origin.x >= anotherRect.origin.x) && (rect.origin.x <= anotherRect.origin.x + anotherRect.size.width)) ||
                    ((anotherRect.origin.x >= rect.origin.x) && (anotherRect.origin.x <= rect.origin.x + rect.size.width));

    BOOL yOverlap = ((rect.origin.y >= anotherRect.origin.y) && (rect.origin.y <= anotherRect.origin.y + anotherRect.size.height)) ||
                    ((anotherRect.origin.y >= rect.origin.y) && (anotherRect.origin.y <= rect.origin.y + rect.size.height));

    return xOverlap && yOverlap;
}

Usage:
You can iterate though all subviews of a view and check if the frame of your view overlaps another view's frame. Suppose you have a property myView then:

for(UIView *v in self.view.subviews)
    {
        if(v == self.myView) //skip the same view
            continue;

        if([self rect:self.myView.frame overlap:v.frame])
        {
            //Do something...
        }
    }
于 2012-04-21T05:55:19.907 回答
1

首先,您在主视图中获得所有视图的数组:

NSArray *subviews = [view subviews];

然后,对于每个视图,您可以检查每个视图的框架:

for (int i = 0 ; i < [subviews count]; i++){
    CGRect frame = [subviews objectAtIndex:i].frame;
}
于 2012-04-19T14:21:05.083 回答
0

您可以在 for 循环中浏览该 UIImageView 的父视图的子视图。并将每个视图的位置与特定 UIImageView 的位置进行比较。

但这对我来说听起来很糟糕。也许如果你能告诉更多关于这个问题的信息,我们可以提供更好的帮助。

于 2012-04-19T14:20:31.170 回答
0

您也可以使用这种方法:

既然你说你有 ImageView 的位置,那么将它保存在一些 CGRect 变量中。试试这个

UIImageView *yourImgView = (UIImageView *)[view subviews];

这将返回您的 imageView 。然后,您可以根据需要检查其较早保存的位置或其可见性的框架。

于 2012-04-20T04:38:24.030 回答