Qt5.9中利用QSS更改QTreeView的展開節點箭頭小圖示用法

1.1要更改QTreeView的展開節點箭頭小圖示，用QSS主要用如下語句：

"QTreeView::branch:open:has-children:!has-siblings,"
"QTreeView::branch:open:has-children:has-siblings {image: url(:res/recoverydata/icon/icon_list_2.png);}"
"QTreeView::branch:has-children:!has-siblings:closed,"
"QTreeView::branch:closed:has-children:has-siblings {image: url(:res/recoverydata/icon/icon_list_1.png);}"
"QTreeView::item:hover {background-color:rgb(8,52,127);}"

1.2具體的用法如下所示：

recoveryTreeView->setStyleSheet("QTreeView{background-color: transparent;color:white;font: bold 14px;outline:none;}"
                                    "QTreeView::branch:open:has-children:!has-siblings,"
                                    "QTreeView::branch:open:has-children:has-siblings {image: url(:res/recoverydata/icon/icon_list_2.png);}"
                                    "QTreeView::branch:has-children:!has-siblings:closed,"
                                    "QTreeView::branch:closed:has-children:has-siblings {image: url(:res/recoverydata/icon/icon_list_1.png);}"
                                    "QTreeView::item:hover {background-color:rgb(8,52,127);}"
                                    "QTreeView::item:selected {background-color:rgb(8,52,127);border:1px solid #08347F;}");

1.3效果如下所示：

參考內容：