showModalBottomSheet setState 无法更新ui问题
- 首先理解showModalBottomSheet,本质上可以理解为路由入栈,在show之后弹出的页面其实是另一个页面了,此时再setState刷新的其实是原页面的状态,所以在此方法的builder方法中先返回一个StatefulBuilder,设置其setState方法为state,此时再调用此方法便可做到刷新状态。
showModalBottomSheet(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25), topRight: Radius.circular(25))),
context: context,
builder: (_) {
return StatefulBuilder(builder: (context, state) {
return InkWell(
onTap: () {
state(() {
///update your UI
});
},
child: Container());
});
});
- 设置弹出模态框的高度只需要返回一个SizedBox并指定其高度,并且将isScrollControlled设置为true即可全屏显示
showModalBottomSheet(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25), topRight: Radius.circular(25))),
isScrollControlled: true,
context: context,
builder: (_) {
return SizedBox(height: 400);
});