iOS获取APP后台刷新权限状态

-(BOOL)GetPhoneRefresh
{
   UIBackgroundRefreshStatus status =  [UIApplication sharedApplication].backgroundRefreshStatus;
    switch (status) {
        case UIBackgroundRefreshStatusRestricted:
        {
            NSLog(@"UIBackgroundRefreshStatusRestricted");
            return NO;
            break;
        }
        case UIBackgroundRefreshStatusDenied:
        {
            NSLog(@"UIBackgroundRefreshStatusDenied");
            return NO;
            break;
        }
        case UIBackgroundRefreshStatusAvailable:
        {
            NSLog(@"UIBackgroundRefreshStatusAvailable");
            return YES;
            break;
        }
        default:
            break;
    }
    return NO;
}