首先，在AppDelegate.m 中：

1，注册通知

//[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {      // Override point for customization after application launch.      ViewController *mainCtrl=[[ViewController alloc] init];      self.window.rootViewController=mainCtrl;            //注册通知      if ([UIDevice currentDevice].systemVersion.doubleValue<8.0) {          [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeBadge)];      }      else {          [[UIApplication sharedApplication] registerForRemoteNotifications];          [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge|UIUserNotificationTypeSound|UIUserNotificationTypeAlert categories:nil]];      }            //判断是否由远程消息通知触发应用程序启动      if (launchOptions) {          //获取应用程序消息通知标记数（即小红圈中的数字）          NSInteger badge = [UIApplication sharedApplication].applicationIconBadgeNumber;          if (badge>0) {              //如果应用程序消息通知标记数（即小红圈中的数字）大于0，清除标记。              badge--;              //清除标记。清除小红圈中数字，小红圈中数字为0，小红圈才会消除。              [UIApplication sharedApplication].applicationIconBadgeNumber = badge;              NSDictionary *pushInfo = [launchOptions objectForKey:@"UIApplicationLaunchOptionsRemoteNotificationKey"];                            //获取推送详情              NSString *pushString = [NSString stringWithFormat:@"%@",[pushInfo  objectForKey:@"aps"]];              UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"finish Loaunch" message:pushString delegate:nil cancelButtonTitle:@"cancel" otherButtonTitles:nil, nil nil];              [alert show];          }      }            return YES;

2，注册通知后，获取device token

- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {      NSString *token = [NSString stringWithFormat:@"%@", deviceToken];      NSLog(@"My token is:%@", token);      //这里应将device token发送到服务器端  }    - (void)application:(UIApplication *)app didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {      NSString *error_str = [NSString stringWithFormat: @"%@", error];      NSLog(@"Failed to get token, error:%@", error_str);  }

3，接收推送通知

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo  {      [UIApplication sharedApplication].applicationIconBadgeNumber=0;      for (id key in userInfo) {          NSLog(@"key: %@, value: %@", key, [userInfo objectForKey:key]);      }      /* eg.     key: aps, value: {         alert = "\U8fd9\U662f\U4e00\U6761\U6d4b\U8bd5\U4fe1\U606f";         badge = 1;         sound = default;     }      */      UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"remote notification" message:userInfo[@"aps"][@"alert"] delegate:nil cancelButtonTitle:@"cancel" otherButtonTitles:nil, nil nil];      [alert show];  }

注意：app 前台运行时，会调用 remote notification；app后台运行时，点击提醒框，会调用remote notification，点击app 图标，不调用remote notification，没反应；app 没有运行时，点击提醒框，finishLaunching   中，launchOptions 传参，点击app 图标，launchOptions 不传参，不调用remote notification。