在学习Qt自带示例的时候，发现Media Player Example不能正常播放视频，提示错误：Warning: "No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3.1, profile=(string)m...

在学习Qt自带示例的时候，发现Media Player Example不能正常播放视频，提示错误：Warning: "No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3.1, profile=(string)m...

在学习Qt自带示例的时候，发现Media Player Example不能正常播放视频，提示错误：Warning: "No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3.1, profile=(string)m...

QLineEdit{text-align:center;}QLineEdit设置text-align:center;不起作用。This property is currently supported only byQPushButtonandQProgressBar.https://doc.qt.io/archives/qt-4.8/stylesheet-reference...

编译环境：ubuntu-18.04.2Qt Creator 4.9.1 Based on Qt 5.12.3 (GCC 5.3.1 20160406 (Red Hat 5.3.1-6), 64 bit)QColorDialogQColor color = QColorDialog::getColor(Qt::red,this,tr("选择颜色"));报警：...

编译环境：ubuntu-18.04.2Qt Creator 4.9.1 Based on Qt 5.12.3 (GCC 5.3.1 20160406 (Red Hat 5.3.1-6), 64 bit)QColorDialogQColor color = QColorDialog::getColor(Qt::red,this,tr("选择颜色"));报警：...

Vue CLI 版本是5.0.0-beta.3创建新项目后，运行正常安装element-plus运行报错export ‘createElementVNode’ (imported as ‘_createElementVNode’) was not found in ‘vue’浏览器中报错误Uncaught TypeError: (0 , vue__WEBPACK_IMPORTED_MODULE_0

参考：VUE3.0之v-for 中的 Ref 数组<router-linkv-for="tag in visitedViews"ref="tag":key="tag.path":class="isActive(tag) ? 'active' : ''":to="{ path: tag.path, query: tag.query, fullPath: tag.fullPath }"tag="

element-plus/icons-vue动态菜单(路由) 绑定icon

按比例显示、固定宽度