QT qtextedit setting qscrollbar style sheet does not take effect solution

stay UI Reference inside QTextEdit Control , When designing its style , Usually it will also scroll bar （
horizontalScrollBar、verticalScrollBar） Design styles .

For example, we are right QTextEdit Vertical scroll bar for style design , The style sheet will write like this ：

QTextEdit#textEdit
{
	background:rgba(0,0,0,0.1);
	color:rgba(255,255,255,0.8);

	border-radius:2px;
	border:none;
	font-size:14px;
	font-family:" Microsoft YaHei ";
}

QScrollBar:vertical
{
       border: none;
       background: transparent;
       width: 6px;
}

QScrollBar::handle:vertical
{
       background-color: rgba(255,255,255,1);
       min-height: 30px;
	  border-radius:3px;
	  width: 6px;
   }

QScrollBar::add-line:vertical
{
       border: none;
       height: 0px;
 }

 QScrollBar::sub-line:vertical
{
       border: none;
       height: 0px;
}

 QScrollBar::add-page:vertical,QScrollBar::sub-page:vertical
 {	
	background:transparent;
      border-radius:3px;
}

stay Qt Designer It looks normal inside , Pictured ：

But when running the program （Ctrl + R） when , The stylesheet does not take effect , Pictured ：

============================ Solution =================================

  programme 1： In the constructor of the class, the scroll bar is polish Polishing operation .

ReadingTimeSettingDialog::ReadingTimeSettingDialog(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ReadingTimeSettingDialog)
{
    ui->setupUi(this);

    ui->textEdit->verticalScrollBar()->style()->polish(ui->textEdit->verticalScrollBar());
}

programme 2：

        （1） take QTextEdit The original scroll bar is hidden , Setting scroll bar policy is not ScrollBarAlwaysOff 

        (2) Add new control Vertical Scroll Bar Put in QTextEdit The left side of the  

 

  （3） Set up verticalScrollBar The style sheet of

  （4） Set in the constructor verticalScrollBar by QTextEdit Scroll bar

ReadingTimeSettingDialog::ReadingTimeSettingDialog(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ReadingTimeSettingDialog)
{
    ui->setupUi(this);
    ui->textEdit->setVerticalScrollBar(ui->verticalScrollBar);
}