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

问题描述

我有我的UIImageView，我把一个图像，我调整大小这样：

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;

我试图在我的 UIImageView中获得调整大小的图片的宽度通过这样做：

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。

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?

编辑：这是我的 UIImageView 看起来，红色区域是其 backgroundColor

Here's how my UIImageView looks, red area is its backgroundColor

推荐答案

我不知道是否有更清晰的解决方案，但这样工作：

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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