for (int i = 0; i < agvs.size(); i++) { if (agvs[i].getLoad()){ painter.drawPixmap(agvs[i].getCurrentX()*25+200-(nodeSpacing-nodeSize)/2,(agvs[i].getCurrentY()+1)*25+50-(nodeSpacing-nodeSize)/2,25,25,QPixmap(":/new/prefix1/agvload.png").scaled(25,25)); } else { painter.drawPixmap(agvs[i].getCurrentX()*25+200-(nodeSpacing-nodeSize)/2,(agvs[i].getCurrentY()+1)*25+50-(nodeSpacing-nodeSize)/2,25,25,QPixmap(":/new/prefix1/agv1.png").scaled(25,25)); }}，讓圖片在畫面中處於最上層

你可以使用 `QPainter` 的 `setCompositionMode` 函数来设置图像的混合模式，从而让绘制的图像处于最上层。以下是一个示例代码：

painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
for (int i = 0; i < agvs.size(); i++) {
    if (agvs[i].getLoad()){
        painter.drawPixmap(agvs[i].getCurrentX()*25+200-(nodeSpacing-nodeSize)/2,(agvs[i].getCurrentY()+1)*25+50-(nodeSpacing-nodeSize)/2,25,25,QPixmap(":/new/prefix1/agvload.png").scaled(25,25));
    }
    else {
        painter.drawPixmap(agvs[i].getCurrentX()*25+200-(nodeSpacing-nodeSize)/2,(agvs[i].getCurrentY()+1)*25+50-(nodeSpacing-nodeSize)/2,25,25,QPixmap(":/new/prefix1/agv1.png").scaled(25,25));
    }
}

在上面的代码中，我们将混合模式设置为 `CompositionMode_SourceOver`，这是默认的混合模式。这样绘制的图像就会处于最上层。