将UIImage放入UIButton的简单方法 [英] A simple way to put a UIImage in a UIButton

问题描述

我的iPhone应用程序中有一个UIButton。我将其大小设置为100x100。

I have a UIButton in my iPhone app. I set its size to 100x100.

我有一个400x200的图像，我希望在按钮中显示。

I have an image that is 400x200 that I wish to display in the button.

按钮STILL需要保持在100x100 ......我希望图像缩小以适应......但
保持正确的宽高比。

The button STILL needs to stay at 100x100... and I want the image to downsize to fit... but keep the correct aspect ratio.

我认为这就是Aspect Fit的用法。

I thought that's what "Aspect Fit" was used for.

我是否用setImage或setBackgroundImage包含我的图像？

Do I include my image with setImage, or setBackgroundImage?

我是否为按钮设置了AspectFit？还是形象？或者背景图片？

Do I set AspectFit for the button? or the image? or the background image?

（我需要较小的图像来增加大小。虽然较大的图像应该是DESCREASE的大小。
始终保持按钮为100x100。 ）

(I need the smaller images to INCREASE in size. While larger images should DESCREASE in size. Always keeping the button at 100x100.)

我尝试了以上所有的无数组合...而我似乎无法获得
同时工作的一切：

I've tried countless combinations of all of the above... and I just can't seem to get everything to work at the same time:

• 请勿将按钮的大小更改为100x100。


• 不要破坏图像的宽高比。


• 始终增加小图像以适应按钮。


• 始终减小大图像以适应按钮。


• 永远不要剪辑任何图像边缘。


• 永远不要求将UIButtons放在所有UIimages上黑客攻击。


• 不要要求大家升级到v4.2.1只是为了使用新的框架方法。

• Don't change the button's size of 100x100.
• Don't destroy the image's aspect ratio.
• Always increase small images to fit the button.
• Always decrease large images to fit the button.
• Never clip any of the image edges.
• Never require the "put UIButtons over all your UIimages" hack.
• Don't require everyone to upgrade to v4.2.1 just to use new framework methods.

我看到很多应用程序，有这么多全功能图像按钮...我无法相信我无法弄清楚这个非常简单，非常常见的事情。

I see so many apps, with so many fully-working image-buttons... that I can't believe I can't figure out this very simple, very common thing.

呃。

推荐答案

UIButton坏了。这是简短的答案。其image和backgroundImage属性中的 UIImageView 不尊重 UIViewContentMode 设置。它们是只读属性，而这些UIImageViews的 UIImage 内容可以通过 setImage：和<设置code> setBackgroundImage：方法，内容模式不能。

UIButton is broken. That's the short answer. The UIImageViews in its image and backgroundImage properties don't respect UIViewContentMode settings. They're read-only properties, and while the UIImage contents of those UIImageViews can be set through setImage: and setBackgroundImage: methods, the content mode can't be.

解决方案是提供适当大小的图像你的软件包开始，或者放下UIImageView，按照你想要的方式配置它，然后在它上面放一个清晰的自定义UIButton。我承诺，这就是你见过的那些花哨的专业应用程序。我们都必须这样做。

The solution is either to provide properly-sized images in your bundle to begin with, or to put a UIImageView down, configure it the way you want it, and then put a clear "custom" UIButton over top of it. That's the hack all those fancy professional apps you've seen have used, I promise. We're all having to do it.

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