关于远程推送的相关配置网上已经有足够多的教程，这里就不复述了。这里讲述当客户端收到推送消息后，应怎样对其进行相应的逻辑处理。
工程的AppDelegate.m文件里提供了如下方法：
//当应用程序启动后，可能需要进行其他逻辑处理时调用的方法- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions;//成功注册registerUserNotificationSettings:后，回调的方法- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings;/// 注册失败调用- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error;/// 用户同意接收通知后，会调用此程序- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken;//收到推送后调用的方法（iOS 10 及以上）- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler;//收到推送后调用的方法（iOS 10 以下）- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler;//应用挂起前调用的方法（当有电话进来或者锁屏，应用会挂起）- (void)applicationWillResignActive:(UIApplication *)application;//当程序复原或启动时调用的方法- (void)applicationDidBecomeActive:(UIApplication *)application;//应用将要进入后台调用的方法- (void)applicationWillEnterForeground:(UIApplication *)application;//应用进入后台调用的方法-(void)applicationDidEnterBackground:(UIApplication *)application;//应用将要退出- (void)applicationWillTerminate:(UIApplication *)application;首先为应用程序注册通知：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSDictionary *remoteNotification = [launchOptions objectForKey:@"UIApplicationLaunchOptionsRemoteNotificationKey"]; if (remoteNotification != nil) { self.isLaunchedByNotification = YES; }else{ self.isLaunchedByNotification = NO; } self.window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]]; if ([[UIDevice currentDevice].systemVersion floatValue] >= 10.0) { UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; center.delegate = self; [center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert) completionHandler:^(BOOL granted, NSError * _Nullable error) { if (!error) { NSLog(@"succeeded!"); } }]; } else if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0){//iOS8-iOS9 UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound) categories:nil]; [application registerUserNotificationSettings:settings]; [application registerForRemoteNotifications]; } else {//iOS8以下 [application registerForRemoteNotificationTypes: UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound]; } return YES;}用户同意后，会调用此程序，获取系统的deviceToken，应把deviceToken传给服务器保存，此函数会在程序每次启动时调用(前提是用户允许通知)：
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken { NSLog(@"deviceToken = %@",deviceToken); NSString *token=[NSString stringWithFormat:@"%@",deviceToken]; token=[token stringByReplacingOccurrencesOfString:@"<" withString:@""]; token=[token stringByReplacingOccurrencesOfString:@">" withString:@""]; token=[token stringByReplacingOccurrencesOfString:@" " withString:@""]; //TODO //保存到本地并上传到服务器}收到推送消息后，进行相应的逻辑处理：
//iOS 10 及以上- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler { completionHandler(UIBackgroundFetchResultNewData); NSDictionary *userInfo = response.notification.request.content.userInfo; //程序关闭状态点击推送消息打开 if (self.isLaunchedByNotification) { //TODO } else{ //前台运行 if ([UIApplication sharedApplication].applicationState == UIApplicationStateActive) { //TODO } //后台挂起时 else{ //TODO } //收到推送消息手机震动，播放音效 AudioServicesPlaySystemSound(kSystemSoundID_Vibrate); AudioServicesPlaySystemSound(1007); } //设置应用程序角标数为0 [UIApplication sharedApplication].applicationIconBadgeNumber = 9999; [UIApplication sharedApplication].applicationIconBadgeNumber = 0;}//iOS 10 以下- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler { completionHandler(UIBackgroundFetchResultNewData); //程序关闭状态点击推送消息打开 if (self.isLaunchedByNotification) { //TODO } else{ //前台运行 if ([UIApplication sharedApplication].applicationState == UIApplicationStateActive) { //TODO } //后台挂起时 else{ //TODO } //收到推送消息手机震动，播放音效 AudioServicesPlaySystemSound(kSystemSoundID_Vibrate); AudioServicesPlaySystemSound(1007); } //设置应用程序角标数为0 [UIApplication sharedApplication].applicationIconBadgeNumber = 9999; [UIApplication sharedApplication].applicationIconBadgeNumber = 0;}应用进入后台时，设置角标数（应用图标右上角小红点，未读消息数）：
-(void)applicationDidEnterBackground:(UIApplication *)application{ [[UIApplication sharedApplication] setApplicationIconBadgeNumber:123];}
