ios - Robovm : registering for push notification on IOS7 & IOS8

Question

我正在尝试使用我自己的简单绑定(bind) PushManager 在 robovm.0.0.14 上注册推送通知，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

它正在 IOS8 设备上运行，但应用程序在 IOS 7 设备上在类链接阶段崩溃，如下所示:

dyld: Symbol not found: _OBJC_CLASS_$_UIUserNotificationSettings
Referenced from: /var/mobile/Applications/6C45E5E5-AF8F-43E8-9680-5CD3076DB1FF/Game.app/Game Expected in: /System/Library/Frameworks/UIKit.framework/UIKit in /var/mobile/Applications/6C45E5E5-AF8F-43E8-9680-5CD3076DB1FF/Game.app/Game

我知道UIUserNotificationSettings类与 iOS 8 一起出现，但我如何忽略 iOS 7 上的绑定(bind) PushManager 类？

是否有针对此 iOS 版本特定问题的解决方法或修复？

Answer 1

我检查类的存在UIUserNotificationSettings ，这是相关的，仅适用于 iOS 8。

NSClassFromString(@"UIUserNotificationSettings")

这有点间接，但对我有用。