在 iOS8中请求用户接收 UILocalNotification 的权限

我已经在应用程序代理中设置了本地通知，使用如下:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
UILocalNotification *notification = [[UILocalNotification alloc]init];
[notification setAlertBody:@"Watch the Latest Episode of CCA-TV"];
[notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:5]];
[notification setTimeZone:[NSTimeZone defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification]];
}

当我运行应用程序，然后退出它，我收到一个错误说:

2014-06-0711:14:16.663 CCA-TV [735:149070] 尝试安排本地通知{ fire Date = Saturday，June 7,2014 at 11:14:21 UTC-7，time Zone = America/Los _ Angeles (PDT)偏移量 -25200(Daylight) ，重复 间隔 = 0，重复计数 = UILocalNotificationInfiniteRepateCount, 下一个火灾日期 = 2014年6月7日，星期六，太平洋夏令时11:14:21 Time，user info = (null)} < strong > 带有警报但尚未收到 允许用户显示警报

如何获得显示警报所需的权限？

64716 次浏览
小开
最佳答案

由于 iOS8需要获得用户的许可才能显示来自应用程序的通知，这适用于远程/推送和本地通知。在斯威夫特里你可以这样做,

Swift 2.0更新

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
// Override point for customization after application launch.
if(UIApplication.instancesRespondToSelector(Selector("registerUserNotificationSettings:")))
{
let notificationCategory:UIMutableUserNotificationCategory = UIMutableUserNotificationCategory()
notificationCategory.identifier = "INVITE_CATEGORY"
notificationCategory.setActions([replyAction], forContext: UIUserNotificationActionContext.Default)


//registerting for the notification.
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes:[.Sound, .Alert, .Badge], categories: nil))
}
else
{
//do iOS 7 stuff, which is pretty much nothing for local notifications.
}
return true
}

Swift 3.2

if(UIApplication.instancesRespond(to: #selector(UIApplication.registerUserNotificationSettings(_:)))){
let notificationCategory:UIMutableUserNotificationCategory = UIMutableUserNotificationCategory()
notificationCategory.identifier = "INVITE_CATEGORY"
notificationCategory.setActions([replyAction], forContext: UIUserNotificationActionContext.Default)


//registerting for the notification.
application.registerUserNotificationSettings(UIUserNotificationSettings(types:[.sound, .alert, .badge], categories: nil))
}
else{
//do iOS 7 stuff, which is pretty much nothing for local notifications.
}

目标 C 语法也非常相似。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]){
[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
}
// Override point for customization after application launch.
return YES;
}

要检查当前注册的通知类型，可以使用 UIApplication 类的方法,

- (UIUserNotificationSettings *)currentUserNotificationSettings

So if the user has said no to your app then this function should return a setting without any types in it.

我已经写了一个关于这个教程，你可以看到它 给你。

小开

将这段代码放在视图控制器中，您将首先对通知进行编程(如果您在启动时对通知进行编程，那么它将是 application:didFinishLaunchingWithOptions:) :

if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]) {
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeSound categories:nil]];
}

斯威夫特:

if(UIApplication.instancesRespondToSelector(Selector("registerUserNotificationSettings:"))) {
UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Alert | .Sound, categories: nil))
}

根据系统版本号进行测试的解决方案是次优的，并且容易出错。

小开

I just faced the same problem. Seems like in iOS 8 we need to do an additional step, usually done inside: 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { /*...*/ }

You can use this code if you want to keep it backward compatible:

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)])
{
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]];
}
#endif

系统会记住这个决定，并且只会问一次。

小开

试试目标 C:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:    (NSDictionary *)launchOptions
{
// are you running on iOS8?
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)])
{
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeBadge|UIUserNotificationTypeAlert|UIUserNotificationTypeSound) categories:nil];
[application registerUserNotificationSettings:settings];
}
else // iOS 7 or earlier
{
UIRemoteNotificationType myTypes = UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound;
[application registerForRemoteNotificationTypes:myTypes];
}
}

斯威夫特:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
// Override point for customization after application launch.
if(UIApplication.instancesRespondToSelector(Selector("registerUserNotificationSettings:")))
{
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound | UIUserNotificationType.Alert | UIUserNotificationType.Badge, categories: nil))
}
else
{
//
}
return true
}
小开

* * 本地通知，iOS8 + 有三个按钮操作

//Button : I TOOK IT , REMIND LATER , SKIP IT**

        let completeAction = UIMutableUserNotificationAction()
completeAction.identifier = "COMPLETE_TODO"
completeAction.title = "I TOOK IT"
completeAction.activationMode = .Background
completeAction.destructive = true
completeAction.authenticationRequired = false


let remindAction = UIMutableUserNotificationAction()
remindAction.identifier = "REMIND_TODO"
remindAction.title = "REMIND LATER"
remindAction.activationMode = .Background
remindAction.destructive = false
//  remindAction.authenticationRequired = false


let skipAction = UIMutableUserNotificationAction()
skipAction.identifier = "SKIP_TODO"
skipAction.title = "SKIP IT"
skipAction.activationMode = .Background
skipAction.destructive = false
skipAction.authenticationRequired = false




let todoCategory = UIMutableUserNotificationCategory()
todoCategory.identifier = "TODO_CATEGORY"
todoCategory.setActions([completeAction, remindAction, skipAction], forContext: .Default)
todoCategory.setActions([completeAction,remindAction,skipAction], forContext: .Minimal)




if application.respondsToSelector("isRegisteredForRemoteNotifications")
{


let categories = NSSet(array: [todoCategory,todoVideoCategory])
let types:UIUserNotificationType = ([.Alert, .Sound, .Badge])


let settings:UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, categories: categories as? Set<UIUserNotificationCategory>)


application.registerUserNotificationSettings(settings)
application.registerForRemoteNotifications()


}


}

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