xcode 导航栏按钮图像未在 Swift 中显示
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Navigation bar button image not showing in Swift
提问by beninabox_uk
I'm back again.
我又回来了。
I'm writing an app in Swift using Xcode 7. I've added a navigation controller and on top of that a navigation item, and then a bar button. I'm trying to change the image of the bar button to a png that I've imported into Xcode. However, it just shows this in the design and also when I run the app. It just shows a blue smudge in the navigation area.
我正在使用 Xcode 7 在 Swift 中编写一个应用程序。我添加了一个导航控制器和一个导航项，然后是一个条形按钮。我正在尝试将条形按钮的图像更改为我已导入 Xcode 的 png。但是，它只是在设计中以及在我运行应用程序时显示了这一点。它只是在导航区域显示蓝色污点。
I've tried importing the image into the project and also into images.xcassets with the same results.
我已经尝试将图像导入到项目中，也导入到 images.xcassets 中，结果相同。
Anyone know what may be wrong here?
有谁知道这里可能有什么问题？
Here's the image I've been trying to add and the settings I currently have.
这是我一直在尝试添加的图像和我目前拥有的设置。
Settings:
设置：
回答by Nicholas Murray
The way to resolve navigation button images appearing as blue is to select the image set in Assets.
解决导航按钮图像显示为蓝色的方法是选择资产中设置的图像。
And then choose Original Image from the Render As select options.
然后从“渲染为”选择选项中选择“原始图像”。
回答by cekisakurek
You should have a image with alpha.(The sample image you posted has white background). Also you should set the image with template mode. I dont know how to do that in Interface builder. This is a sample code to convert the image to template.
您应该有一张带有 alpha 的图像。（您发布的示例图像具有白色背景）。您还应该使用模板模式设置图像。我不知道如何在界面构建器中做到这一点。这是将图像转换为模板的示例代码。
var image = UIImage(named: "").imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
