iOS 远程推送

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注册

iOS 10上

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UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
// 必须写代理，不然无法监听通知的接收与点击
center.delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
[center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert | UNAuthorizationOptionBadge | UNAuthorizationOptionSound) completionHandler:^(BOOL granted, NSError * _Nullable error) {
    if (granted) {
        [center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
            NSLog(@"%@", settings);
        }];
    } else {
        NSLog(@"注册失败");
    }
}];
[[UIApplication sharedApplication] registerForRemoteNotifications];

在iOS10中有一个NotificationCenter，App收到通知都会在NotificationCenter的Delegate中回调，具体下面有两个方法：

当App在前台的时候，当收到推送的时候，会回调到这个方法。

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- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler

在iOS10中最主要的是在前台的情况下，横幅可以展示出来！！！太好了！！！！设置下面的就可以了.

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completionHandler(UNNotificationPresentationOptionBadge|
                  UNNotificationPresentationOptionSound|
                  UNNotificationPresentationOptionAlert);

这个方法是点击通知会回调到这里：无论App在前台或者是后台，无论是本地通知还是远程通知都会回调到这里

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- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler

iOS 8〜9

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+ (void)registerRemoteNotificationForIOS8{
    UIUserNotificationSettings *settings =
    [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeAlert|UIUserNotificationTypeSound|UIUserNotificationTypeBadge) categories:nil];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
}

这个方法可分为下面几种:

  • 当App在前台，接收到通知时会调用这个方法
  • 当App在后台，点击通知会调用这个方法
  • 透传也会调到这里来，包含iOS10
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- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    completionHandler(UIBackgroundFetchResultNewData);
    //此处代码。。。。。。
}

上面说的都是关于普通的消息，下面关于透传的消息

1这个就是透传的回调方法，经实验在iOS10中会也回调到这里。而且还有一个，就是如果没实现这个方法，它会回调到上面iOS7以前的那个回调方法上

(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler```
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iOS7以前的回调方法

`- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo`


### 他们在iOS8和iOS9中共同点是：注册成功和注册失败都会回调这两个方法

```-(void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error

-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

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