Question

I want to rotate my UIImageView and set the size according to the aspect ratio. But I have some problems with that. First I paste here my code, then I explain the problem.

imageView.size = CGSizeMake(myWidth, myHeight);
[imageView setContentMode:UIViewContentModeCenter];

So these two lines set the size and the contentMode of my imageView. When I do this the image appears correctly. So when the device is rotated I catch the rotation notification and

if ([self isLandscape]) {
    CGFloat aspect = myHeight / myWidth;
    imageView.size = CGSizeMake(myWidth/aspect, myWidth);
    [self rotateView:imageView withDegree:degree];
    imageView.origin = CGPointMake(x, y);
} else {
    [self rotateView:imageView withDegree:degree];
    imageView.origin = CGPointMake(x, y);
    imageView.size = CGSizeMake(myWidth, myHeight);
}

So then the rotation is done. But you can see that I am also do a resizing.
The problem is that my imageView has a minimum size which cannot be overridden. But I figured out that if I change the contentMode property of my imageView from UIViewContentModeCenter to UIViewContentModeScaleAspectFit then it will work good but the size is smaller than what I expect. Why is that? :( How can I solve this? Please if you have any help!

Answer 1

ScaleAspectFit只会将内容缩放到全部可见且不裁剪的大小。如果您想让内容填充视图并可能裁剪一些部分，您需要使用UIViewContentModeScaleAspectFill。

然而，如果您只想强制每个维度的最小尺寸，您可以使用MAX宏。

CGSize mySize = CGSizeMake(myWidth, myHeight);
mySize.x = MAX(mySize.x, myXMin);
mySize.y = MAX(mySize.y, myYMin);
imageView.size = mySize;

另外，只是确认你真的想要横向大小为 （宽*宽/高，宽） 而不仅仅是 （高，宽）。

友情链接