• 在application:didFinishLaunchingWithOptions:和application:didRegisterUserNotificationSettings:方法中注册通知

-(void)application:(UIApplication*)application
didFinishLaunchingWithOptions:(NSDictionary*)launchOptions{
    if ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) {
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
    }
    else {
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert];
    }
}

- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings {
    [application registerForRemoteNotifications];
}

• 拿到deviceToken的回调

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    NSLog(@"%@", deviceToken);
}

• 注册远程通知失败的回调

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
    NSLog(@"%@", error.localizedDescription);
}