3.处理多窗口问题

package main

import (
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/container"
    "fyne.io/fyne/v2/widget"
)

func main() {
    a := app.New()

    w1 := a.NewWindow("Window 1")
    w1.SetContent(container.NewVBox(
        widget.NewLabel("Test01"),
    ))

    w2 := a.NewWindow("Window 2")
    w2.SetContent(container.NewVBox(
        widget.NewLabel("Test02"),
    ))

    w1.Show()
    w2.Show()
    a.Run()
}