問題描述

我正在通過帶有參數樣式表的命令行運行我的 Qt 應用程序.控件的樣式有效，但在我嘗試為 MainWindow 加載背景圖像時無效.我試過了:

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);
}

還嘗試刪除背景中的:"，但沒有任何區別.有人能告訴我這個樣式表有什么問題嗎?

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

推薦答案

您嘗試使用的圖像在哪里?

Where is located the image you are trying to use ?

您是否將其作為應用程序的資源?

Did you put it as a resource of your application ?

如果您想使用屬于資源一部分的圖像，您的項目中應該有一個資源文件 (*.qrc).該文件應包含如下內容:

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>

然后，您可以在 QMainWindow 的構造函數中編寫此代碼:

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 資源系統，您可以將圖像的路徑放在磁盤上:

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);");

但如果您使用相對路徑請小心:Qt 將從當前位置開始，這可能會改變，特別是如果您使用 Qt Creator 進行開發.

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，當您在調試模式下運行應用程序時，當前路徑在 debug/ 中.當您在發布模式下運行您的應用時，當前路徑位于 release/(除非您更改了設置).

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).

這篇關于無法在 Qt 樣式表中設置背景圖像的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！