Flutter 颤振载荷屏幕,直到返回数据
我正在我的应用程序中使用以获得用户通知权限。这是我获取Flutter 颤振载荷屏幕,直到返回数据,flutter,dart,asynchronous,async-await,permissions,Flutter,Dart,Asynchronous,Async Await,Permissions,我正在我的应用程序中使用以获得用户通知权限。这是我获取状态的方式: Future<NotificationPermissionStatus> getNotificationPermStatus() { return Permission.notification.status.then( (status) { switch (status) { case PermissionStatus.denied:
状态的方式:
Future<NotificationPermissionStatus> getNotificationPermStatus() {
return Permission.notification.status.then(
(status) {
switch (status) {
case PermissionStatus.denied:
return NotificationPermissionStatus.DENIED_FROM_SETTINGS;
case PermissionStatus.granted:
return NotificationPermissionStatus.GRANTED_FROM_SETTINGS;
case PermissionStatus.restricted:
return NotificationPermissionStatus.UNKNOWN;
case PermissionStatus.limited:
return NotificationPermissionStatus.UNKNOWN;
case PermissionStatus.permanentlyDenied:
return NotificationPermissionStatus.UNKNOWN;
}
},
);
}
目标:
在屏幕上显示加载指示器,直到getNotificationPermStatus()代码>已完成。如果完成,则隐藏加载指示器,并设置permissionStatus=getNotificationPermStatus()代码>
我尝试在我的init
中使用async
和await
,但这是不允许的(对于flatter来说是非常新的)。这里怎么走?如果你需要更多信息,请告诉我
@override
initState() {
super.initState();
_permissionStatus = getNotificationPermStatus();
WidgetsBinding.instance!.addObserver(this);
}