QT modify the icon and name in the upper left corner

One, modify the name

In the constructor, set

	this.setWindowTitle("新名称");

Re-run in this way, you can find that the name has been modified.

Two, modify the icon

1. First prepare an .ico (icon) file

如果不会的，可以提前准备一张图片，网上有在线转换的，可以直接转换。