Robovm：在IOS7和IOS8上注冊推送通知

Question

我正在嘗試使用我自己的簡單綁定PushManager在robovm.0.0.14上注冊推送通知，如下所示：

#import "PushManager.h"

@implementation PushManager

-(void) registerForPushNotifications
{

    NSLog(@"Registering for push notifications");
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        NSLog(@"Registering for IOS 8 and later");
        [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
        [[UIApplication sharedApplication] registerForRemoteNotifications];
    } else {
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
         (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
    }

}

@end

它在IOS8設備上運行，但在類鏈接階段，應用程序在IOS 7設備上崩潰，如下所示：

dyld：找不到符號：_OBJC_CLASS _ $ _ UIUserNotificationSettings
引用自：/ var / mobile / Applications / 6C45E5E5- /var/mobile/Applications/6C45E5E5-AF8F-43E8-9680-5CD3076DB1FF/Game.app/Game AF8F-43E8-9680-5CD3076DB1FF / Game.app / Game

我知道iOS 8 UIUserNotificationSettings類，但是如何在iOS 7上忽略綁定PushManager類呢？

是否有針對此iOS版本特定問題的解決方法或修復程序？

Answer 1

我檢查是否存在UIUserNotificationSettings類，該類相關，並且僅可用於iOS 8。

NSClassFromString(@"UIUserNotificationSettings")

這有點間接，但是對我有用。