66 lines
1.5 KiB
Markdown
66 lines
1.5 KiB
Markdown
# Qt 使用技巧
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## -platform
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在直行 Qt UI 程序时通过该参数可以直行所使用的平台和 UI 系统，如
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```bash
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./Example -platform wayland-egl
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```
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## QT_DEBUG_PLUGINS
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在 Shell 中
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```bash
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export QT_DEBUG_PLUGINS=1
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```
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可在直行程序时打印 PLUGINS 信息，以确认某些插件是否被正确加载。
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## 添加图标
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### 制作图标
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先安装 ImageMagic 工具，并将其添加到系统 PATH 下方便使用。
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使用以下命令将多个不同尺寸的图片打包成一个 ICO 文件。
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```bash
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magick.exe convert icon-16.png icon-32.png icon-256.png myappico.ico
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```
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### 添加图标到应用
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在 Qt .pro 文件中添加以下内容，以便将图标编译到 Qt 程序中：
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```qt
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RC_ICONS = myappico.ico
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```
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However, if you already have an .rc file, for example, with the name myapp.rc, which you want to reuse, the following two steps will be required. First, put a single line of text to the myapp.rc file:
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```qt
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IDI_ICON1 ICON "myappico.ico"
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```
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Then, add this line to your myapp.pro file:
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```qt
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RC_FILE = myapp.rc
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```
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If you do not use qmake, the necessary steps are: first, create an .rc file and run the rc or windres program on the .rc file, then link your application with the resulting .res file.
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更详细内容见《[Setting the Application Icon](https://doc.qt.io/qt-5/appicon.html)》。
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## Windows 下程序打包
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可通过
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```bash
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<QT Install Path>\<Tool Chain>\bin\windeployqt.exe <Exe File>
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```
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命令找出依赖的库。
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