本文介绍了在 UIViewContentModeScaleAspectFit 之后获取调整大小的图像的宽度的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有我的 UIImageView，我在其中放了一张我这样调整大小的图片:
I have my UIImageView and I put an image into it that I resize like this:
UIImageView *attachmentImageNew = [[UIImageView alloc] initWithFrame:CGRectMake(5.5, 6.5, 245, 134)];
attachmentImageNew.image = actualImage;
attachmentImageNew.backgroundColor = [UIColor redColor];
attachmentImageNew.contentMode = UIViewContentModeScaleAspectFit;
我尝试通过这样做在 UIImageView 中获取调整后图片的宽度:
I tried getting the width of the resized picture in my UIImageView by doing this:
NSLog(@"Size of pic is %f", attachmentImageNew.image.size.width);
但它实际上返回了原始图片的宽度.关于如何获得我在屏幕上看到的图片框架的任何想法?
But it actually returns me the width of the original picture. Any ideas on how do I get the frame of the picture that I see on screen?
这是我的 UIImageView 的样子，红色区域是它的 backgroundColor
Here's how my UIImageView looks, red area is its backgroundColor
推荐答案
我不知道有没有更明确的解决方案，但是这个可行:
I don't know is there more clear solution, but this works:
float widthRatio = imageView.bounds.size.width / imageView.image.size.width;
float heightRatio = imageView.bounds.size.height / imageView.image.size.height;
float scale = MIN(widthRatio, heightRatio);
float imageWidth = scale * imageView.image.size.width;
float imageHeight = scale * imageView.image.size.height;
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