问：PaintEvent IOS像素弧

Question

所以我有一个Q::Painter画了一些圈。在Windows上画的圆圈完美，但在iOS上说到像素化：

这也是非像素图像：

我会很greatfull如果有人可以帮助我这个问题。该代码是完全一样的，但iOS的渲染它坏...

这里是我的代码：

void CQtPercentCircleWidget::paintEvent(QPaintEvent *pe) 
{ 
    int circleX = parentWidget()->width()/2 - m_iCircleWidth/2; 
    int circleY = m_iPenWidth; 
    QRectF normalCircle(circleX, circleY, m_iCircleWidth, m_iCircleHeight); 
    QPainter painter(this); 
    painter.setRenderHints((QPainter::Antialiasing,QPainter::HighQualityAntialiasing), QPainter::SmoothPixmapTransform); 
    painter.setPen(m_qpenNormalColor); 
    painter.drawEllipse(normalCircle); 
    QRectF activeCircle(circleX, circleY, m_iCircleWidth, m_iCircleHeight); 
    int startAngle = 90 * 16; 
    double dProgress = (double)m_iProgressPercent; 
    int currentAngle = (dProgress/100) * (360 * 16); 
    painter.setPen(m_qpenCurrectPenColor); 
    painter.drawArc(activeCircle, startAngle, currentAngle); 

} 

Answer 1

您正在使用setRenderHints()错误。将其更改为：

painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing | QPainter::SmoothPixmapTransform);