UIApplicationLaunchOptionsLocalNotificationKey 始终为 null - iOS
UIApplicationLaunchOptionsLocalNotificationKey always null - iOS
我有一个使用本地通知的 iOS 应用程序。当应用程序在后台 运行 或处于活动状态时,我使用 application didReceiveLocalNotification
方法并且效果很好。但是当应用程序关闭时(不是运行在后台),我使用application didFinishLaunchingWithOptions
方法来控制处理通知时发生的事情。
但是,我遇到的问题是 didFinishLaunchingWithOptions
方法中的通知总是 (null)
。
这是我的代码:
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// Register the app for local notifcations.
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]];
}
// Setup the local notification check.
UILocalNotification *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
//UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"options" message:notification delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
//[alertView show];
// Check if a notifcation has been received.
if (notification) {
// Run the notifcation.
[self.myViewController run_notifcation:[notification.userInfo valueForKey:@"notification_id"]];
}
// Ensure the notifcation badge number is hidden.
application.applicationIconBadgeNumber = 0;
return YES;
}
我是不是漏掉了什么?我首先征求了用户的许可,并有正确的代码来获取通知对象。我的应用程序仅适用于 iOS 9 及更高版本。
丹,谢谢你的时间。
在 applicationWillTerminate
而不是 didFinishLaunchingWithOptions
中实现您的代码。因为当应用程序终止时,然后执行 applicationWillTerminate
方法。
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
在警报视图中显示值 launchOptions
以查看是否有任何值。
如果该值不为零,那么您的 UI 代码可能会在后台线程中执行。
确保所有UI代码都在主线程中执行,如下所示:
dispatch_async(dispatch_get_main_queue(), ^{
//self doSomething (UI Code)
});
当您在应用中使用异步调用时,这一点很重要。
我有一个使用本地通知的 iOS 应用程序。当应用程序在后台 运行 或处于活动状态时,我使用 application didReceiveLocalNotification
方法并且效果很好。但是当应用程序关闭时(不是运行在后台),我使用application didFinishLaunchingWithOptions
方法来控制处理通知时发生的事情。
但是,我遇到的问题是 didFinishLaunchingWithOptions
方法中的通知总是 (null)
。
这是我的代码:
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// Register the app for local notifcations.
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]];
}
// Setup the local notification check.
UILocalNotification *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
//UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"options" message:notification delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
//[alertView show];
// Check if a notifcation has been received.
if (notification) {
// Run the notifcation.
[self.myViewController run_notifcation:[notification.userInfo valueForKey:@"notification_id"]];
}
// Ensure the notifcation badge number is hidden.
application.applicationIconBadgeNumber = 0;
return YES;
}
我是不是漏掉了什么?我首先征求了用户的许可,并有正确的代码来获取通知对象。我的应用程序仅适用于 iOS 9 及更高版本。
丹,谢谢你的时间。
在 applicationWillTerminate
而不是 didFinishLaunchingWithOptions
中实现您的代码。因为当应用程序终止时,然后执行 applicationWillTerminate
方法。
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
在警报视图中显示值 launchOptions
以查看是否有任何值。
如果该值不为零,那么您的 UI 代码可能会在后台线程中执行。
确保所有UI代码都在主线程中执行,如下所示:
dispatch_async(dispatch_get_main_queue(), ^{
//self doSomething (UI Code)
});
当您在应用中使用异步调用时,这一点很重要。