如何阻止图像在 UIImageView 中拉伸?

How to stop an image from stretching within a UIImageView?(如何阻止图像在 UIImageView 中拉伸?)

问题描述

我有一个 UIImageView，其中我将帧大小设置为 x = 0, y = 0, width = 404, height = 712.在我的项目中，我需要动态更改 UIImageView 中的图像.

I have a UIImageView where I have set the frame size to x = 0, y = 0, width = 404, height = 712. In my project, I need to change the image in UIImageView dynamically.

我正在使用此代码更改图像:

I am using this code to change the image:

self.imageView.image = [UIImage imageNamed:@"setting-image.png"];

问题是，当 *.png 图像尺寸小于 UIImageView 框架尺寸时，图像会拉伸.我不想让它伸展.有没有办法做到这一点?

The problem is, when the *.png image size is smaller than the UIImageView frame size, the image stretches. I don't want it to stretch. Is there any way to do that?

推荐答案

可以用

self.imageView.contentMode = UIViewContentModeScaleAspectFit;

斯威夫特 3:

imageView.contentMode = .scaleAspectFit

或 UIViewContentModeCenter/.center，或 UIView 文档.

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