无法在Qt样式表中设置背景图片 [英] Unable to set the background image in Qt Stylesheet

问题描述

我运行我的Qt应用程序通过命令行参数-stylesheet。控件的样式工作，但不是当我试图加载MainWindow的背景图像。
我试过：

I'm running my Qt app through command line with a parameter -stylesheet. The styles for the controls work but not when I'm trying to load a background image for the MainWindow. I tried:

QMainWindow{
background-image:url(:image_256_8bit_latest_back.png);
}

也尝试在后台删除：区别。

Also tried removing the ":" in background, but doesn't make a difference. Can somebody tell me what's wrong with this StyleSheet?

推荐答案

您要使用的图片位置在哪里？

Where is located the image you are trying to use ?

是否将其作为资源

如果您想使用属于资源的图片，您应该有一个资源文件（ *。qrc ）。此文件应包含如下内容：

If you want to use an image which is part of your resources, you should have a resource file (*.qrc) in your project. This file should contain something like this :

<RCC>
   <qresource prefix="/images">
      <file alias="sunset.jpg">sunset.jpg</file>
   </qresource>
</RCC>

：

Then, you could write this code in the constructor of your QMainWindow :

setStyleSheet("background-image: url(:/images/sunset.jpg);");

如果您不想使用 Qt资源系统，您只需将磁盘上的映像路径：

If you don't want to use the Qt resource system, you can just put the path to your image on your disk :

setStyleSheet("background-image: url(res/images/sunset.jpg);");

请注意，如果使用相对路径：Qt将从当前位置开始，

Be careful though if you are using a relative path : Qt will start from the current location, which might change, particularly if you are developping with Qt Creator.

使用 Qt Creator ，当您运行应用程序时调试模式，当前路径在 debug / 。当您在发布模式下运行应用程序时，当前路径位于 release / （除非您更改了设置）。

With Qt Creator, when you run your app in debug mode, the current path is in debug/. When you run your app in release mode, the current path is in release/ (unless you changed the settings).

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