我正在做的是将 UIImageViews
随机放置在 View 上,我让该部分工作,我所做的就是这样:
return (int)0 + arc4random() % (self.view.bounds.frame.size.height-0+1);
还有宽度。
我遇到的是一些UIImageViews
相互重叠。我知道我可以使用 CGRectIntersectsRect ,但是如何循环它直到所有 UIImageViews
不相互重叠?
最佳答案
以下是如何修改当前方法来放置 ImageView 的示例,如我之前的评论中所述:
// make sure this array is a member object, else pass it to the makeFrame method below.
NSArray *imageviews = [[NSArray alloc] initWithObjects: view1, view2, view3, nil]; // make sure they have tags! set the .tag property of each imageview in the array.
UIView *mainView = nil; // this won't really be nil - this is the view you are adding your imageviews to.
for (int i = 0; i < [imageviews count]; i++)
{
UIImageView *imageview = [imageviews objectAtIndex: i];
CGRect newFrame = [self makeFrameForView: imageview];
while (newFrame.origin.x == 0 && newFrame.origin.y == 0)
{
// then the method returned CGRectZero. create it again until we get a good frame.
newFrame = [self makeFrameForView: imageview];
}
[imageview setFrame: newFrame];
}
-(CGRect)makeFrameForView: (UIImageView*)theImageView
{
CGRect newFrame = nil; // create your new frame here using arc4random etc and the parameters you prefer.
for (int i = 0; i < [imageviews count]; i++)
{
UIImageView *imageview = [imageviews objectAtIndex: i];
// first, ensure you aren't checking the same view against itself!
if (theImageView.tag != imageview.tag)
{
BOOL intersectsRect = CGRectIntersectsRect(imageview.frame, newFrame);
if (intersectsRect)
return CGRectZero; // throw an "error" rect we can act upon.
}
}
return newFrame;
}
关于objective-c - 将 UIImageView 随机放置在 UIView 上并且不重叠,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14073668/