UIViewController在另一个上面闪烁

Question

我正在更新作为ios 6上传到AppStore的应用程序，以适应IOS 7 SDK，我有一个UIViewController的问题，我看到UIViewController在另一个上面闪烁了一秒钟，然后我可以看到第二个我应该，我添加了这张图片：

ViewController中间的橙色来自上一个，它只发生在IOS 7上。推送到下一个视图控制器的代码是：`-（iAction）goButtonPressed{NSString*UsersListViewControllerXIB=[[NSString alloc]init]；if（sing.iPhoneType==5）{UsersListViewControllerXIB=@“UsersListViewController5”；}else{UsersListViewControllerXIB=@“UsersListViewController”；

    }

    // sanity check
    if (toAge < fromAge)
    {
        self.alert.title = @"שגיאה";
        self.alert.message = [NSString stringWithFormat:@"\"עד גיל\": %d - לא יכול להיות     קטן מ %d", toAge, fromAge];
        [self.alert show];
        return;
    }
    NSLog(@"goButtonPressed: area:%d from:%d to:%d ", areaCode, fromAge, toAge);
    UsersListViewController *usersListViewController = [[UsersListViewController alloc]               initWithNibName:UsersListViewControllerXIB bundle:[NSBundle mainBundle]];

// save new defaults value:
[[NSUserDefaults standardUserDefaults] setInteger:toAge forKey:@"OnlineAgeMax"];
[[NSUserDefaults standardUserDefaults] setInteger:fromAge forKey:@"OnlineAgeMin"];
[[NSUserDefaults standardUserDefaults] setInteger:areaCode forKey:@"OnlineArea"];

// call synchronize to save changes to disk now
[[NSUserDefaults standardUserDefaults] synchronize];

usersListViewController.areaCode = areaCode;
usersListViewController.fromAge = fromAge;
usersListViewController.toAge = toAge;
usersListViewController.genderCode = [self generateGenderCodeAccordingToUserPref];

NSLog(@"genderCode = %@", usersListViewController.genderCode);

usersListViewController.userGuid = [[NSUserDefaults standardUserDefaults]
                                    objectForKey:@"userGuid"];
usersListViewController.listText = @"מחוברים";
self.title = @"הגדרות מחוברים";

[self.navigationController pushViewController:usersListViewController animated:YES];

}'

Answer 1

最有可能的情况是：第二个（推送的一个）viewController的背景色alpha=0（[UIColor clearColor]）