在 UIViewContentModeScaleAspectFit 之后获取调整大小的图像的宽度

Get width of a resized image after UIViewContentModeScaleAspectFit(在 UIViewContentModeScaleAspectFit 之后获取调整大小的图像的宽度)

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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