iOS容联离线消息接收实现

1.需要在控制台里面上传生产证书
2.把应用上苹果推送开关确认是开启状态
3.应用启动 告诉iOS底层请求token
    //iOS8 注册APNS
    if ([application respondsToSelector:@selector(registerForRemoteNotifications)]) {
        UIUserNotificationType notificationTypes = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:notificationTypes categories:nil];
        [application registerUserNotificationSettings:settings];
    } else {
        UIRemoteNotificationType notificationTypes = UIRemoteNotificationTypeBadge |
        UIRemoteNotificationTypeSound |
        UIRemoteNotificationTypeAlert;
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:notificationTypes];
    }
4、
#warning 将得到的deviceToken传给SDK
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    #warning 将获取到的token传给SDK，用于苹果推送消息使用
[[ECDevice sharedInstance] application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];}