NotificationHandler

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler { //处理远程通知——应用正在运行 
if(application.applicationState == UIApplicationStateInactive) { 
//用户点击通知中心的通知或报警弹窗
[self processRemoteNotification:userInfo];
} else if(application.applicationState == UIApplicationStateBackground) {
//应用在后台，不存在用户交互——只是获取数据 } else {
//应用已经处于激活状态——显示应用内的更新 }
}

-(void)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
id notification = [launchOptions
             objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if(notification != nil) { 
NSDictionary *userInfo = (NSDictionary *)notification;  [self processRemoteNotification:userInfo];
} 
}

-(void)processRemoteNotification:(NSDictionary *)userInfo {  }