registerForRemoteNotifications方法未正确调用

Question

我目前正在使用Xcode6 beta(第一版).使用parse.com,我正在尝试实现推送通知.在我的应用代表中,我有

  [application registerForRemoteNotifications];

当我在ios8 beta iPhone上运行它时,应用程序不会询问我是否要启用推送通知,并且application:didRegisterForRemoteNotificationsWithDeviceToken:从不调用相应的通知.但是,当我尝试在ios7 iPhone上运行它时,应用程序崩溃了,我收到了unrecognized selector该registerForRemoteNotifications方法的错误.

然后,我尝试在以前版本的Xcode(版本5.0)上运行它,但我收到了编译错误 no visible @interface declares registerForRemoteNotifications

我假设这个错误与过渡到iOS 8的错误有关,但我不知道如何解决这个问题.

Answer 1

阅读UIApplication.h中的代码.

你会知道怎么做.

第一:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

像这样添加代码

#ifdef __IPHONE_8_0
  //Right, that is the point
    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound) categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
#else
    //register to receive notifications
    UIRemoteNotificationType myTypes = UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound;
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:myTypes];
#endif

第二:

添加此功能

#ifdef __IPHONE_8_0
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
{
    //register to receive notifications
    [application registerForRemoteNotifications];
}

- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forRemoteNotification:(NSDictionary *)userInfo completionHandler:(void(^)())completionHandler
{
    //handle the actions
    if ([identifier isEqualToString:@"declineAction"]){
    }
    else if ([identifier isEqualToString:@"answerAction"]){
    }
}
#endif

你可以获得deviceToken

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

如果它仍然不起作用,使用此功能和NSLog 错误

-(void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error

Answer 2

几点意见:

• 问题是使用REMOTE,而不是本地
• 一些问题与当地有关,这是完全不同的事情
• 我同意答案时间可能很长,但你必须实现回调(aka委托方法),正如其他人所指出的那样
• 不要对编译器标志进行测试,在概念上和实际上都是错误的

• 测试选择器的存在,如下代码所示:

  func registerForPushForiOS7AndAbove(){
  
  UIApplication.sharedApplication()
  let application = UIApplication.sharedApplication()
  if application.respondsToSelector(Selector("registerUserNotificationSettings:")) {
  
      let notifSettings = UIUserNotificationSettings(forTypes: .Sound | .Alert | .Badge,
          categories: nil)
  
      application.registerUserNotificationSettings(notifSettings)
      application.registerForRemoteNotifications()
  
  }
  else{
      application.registerForRemoteNotificationTypes( .Sound | .Alert | .Badge )
  }
  

  }

(不要错过PList中的UIBackgroundModes ..可以在Capabilities中完成)