[enter image description here][1]enter code here [enter image description here][2]enter code here [enter image description here][3]enter code here [enter image description here][4]enter code here

[1]: https://i.stack.imgur.com/1hHNd.png`enter code here [2]: https://i.stack.imgur.com/CUGLf.pngenter code here [3]: https://i.stack.imgur.com/10hYH.pngenter code here [4]: https://i.stack.imgur.com/4GXBA.pngenter code here`

CodePudding user response：

It's "initState" method. Not "initStat" please check and try.

  @override
  void initState() {
    super.initState();
  }