初始化One Signal以获取playerId/userId时，可以在main.dart文件中调用以下函数。当用户第一次打开应用程序或userId(playerId(更改时，会调用以下函数。
当用户第一次安装我的应用程序时，我想将onesignal用户Id存储在数据库中。我写了以下代码，但不允许我这么做。
然而，当用户从应用程序注销并重新登录时，我可以检索到一个信号用户ID，并可以保存在数据库中。
Future<void> initPlatformState(username) async {
if (!mounted) return;
OneSignal.shared.setLogLevel(OSLogLevel.verbose, OSLogLevel.none);
OneSignal.shared.setRequiresUserPrivacyConsent(_requireConsent);
var settings = {
OSiOSSettings.autoPrompt: false,
OSiOSSettings.promptBeforeOpeningPushUrl: true
};
OneSignal.shared
.setSubscriptionObserver((OSSubscriptionStateChanges changes) {
print("SUBSCRIPTION STATE CHANGED: ${changes.jsonRepresentation()}");
});
OneSignal.shared.setPermissionObserver((OSPermissionStateChanges changes) {
print("PERMISSION STATE CHANGED: ${changes.jsonRepresentation()}");
});
OneSignal.shared.setEmailSubscriptionObserver(
(OSEmailSubscriptionStateChanges changes) {
print("EMAIL SUBSCRIPTION STATE CHANGED ${changes.jsonRepresentation()}");
});
await OneSignal.shared
.init("MY Onesignal APP ID", iOSSettings: settings);
OneSignal.shared
.setInFocusDisplayType(OSNotificationDisplayType.notification);
var status = await OneSignal.shared.getPermissionSubscriptionState();
onesignalUserId = status.subscriptionStatus.userId;
print("player ID: "+ onesignalUserId.toString()); // printing only in re-login
_saveOneSignalId(onesignalUserId,username); // my save funtion into the DB
}
OneSignal.shared.setSubscriptionObserver((OSSubscriptionStateChanges changes) async {
String onesignalUserId = changes.to.userId;
print('Player ID: ' + onesignalUserId);
}
playerId/userId可用于向特定用户发送测试通知。
请尝试一下。
OneSignal.shared.setSubscriptionObserver((OSSubscriptionStateChanges changes)
async{
var status = await OneSignal.shared.getPermissionSubscriptionState();
if (status.subscriptionStatus.subscribed){
String onesignalUserId = status.subscriptionStatus.userId;
print('Player ID: ' + onesignalUserId);
}