如何设置UIImageView的大小等于UIImage的大小？ [英] How to set size of UIImageView equal to size of UIImage?

问题描述

我有一个视图控制器，其中 UIImageView 名为 someImageView 。此图像视图没有默认 UIImage 。我正在使用以下代码加载 UIImage ：

I have an view controller with UIImageView named someImageView. This image view has no default UIImage. I'm loading UIImage with the code below:

UIImage * myImage = [UIImage imageNamed:@"sampleImage.png"];
someImageView.image = myImage;

sampleImage.png 的大小为320x300 。我需要将 someImageView 的大小设置为完全等于 sampleImage.png 。我正在尝试这样做：

The size of sampleImage.png is 320x300. I need to set size of someImageView to size exactly equal to sampleImage.png. I'm trying to do it:

CGRect frame = someImageView.frame;
frame.size = myImage.size;
someImageView.frame = frame;

但它不起作用。

推荐答案

你必须将 contentMode 更改为你的imageView的 UIViewContentModeScaleToFill

You have to change contentMode to UIViewContentModeScaleToFill of your imageView

someImageView.image = myImage;
someImageView.contentMode = UIViewContentModeScaleToFill;

CGRect frame = someImageView.frame;
frame.size = myImage.size;
someImageView.frame = frame;

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