导航栏

YmAppBar("AppBar自定义",
  background:[
  const Color(0xFF606FFF),
  const Color(0xFF3446F2),
],onBackClick: goBack,textColor: Colors.white,),

YmAppBar("AppBar自定义",
  background:[
	const Color(0xFF606FFF),
	const Color(0xFF3446F2),
  ],onBackClick: goBack,textColor: Colors.white,
  textAlign: TextAlign.left,
  rightWidget: YmTextButton(
	  "扫一扫",
	  textColor:Color(0xFFFFFFFF),
	  backgroundColor: Colors.transparent,
	  pressedBackgroundColor: Color(0x50606FFF),
	  size: Size(90,40),
	  onClick:  (){
		print("扫一扫");
	  }
  ),
),