从UITabBarController呈现的模态viewController

Question

我有一个类是UITabBarController的子类，它包含4个子视图控制器。我添加了一个类似于RedLaser，Instagram，Path，DailyBooth和其他应用程序的按钮。我的就像这里的榜样：

此按钮调用TabBarController中的方法，该方法呈现模态viewController。当它被解除时，当前所选viewController中的NavigationControllers开始表现得很奇怪。在您选择tabBar上的另一个选项卡之前，pop动画都会搞砸，并且会发生其他小错误。然后动画就可以了，直到再次呈现viewController。

我确定这是因为我错误地解雇了它，但我不确定如何做到这一点。

这是我在TabBarController中的代码：

-(void)showScanner {
    ZBarReaderViewController *reader = [[ZBarReaderViewController alloc] init];
    reader.readerDelegate = self;
    reader.supportedOrientationsMask = ZBarOrientationMaskAll;

    ZBarImageScanner *scanner = reader.scanner;
    [scanner setSymbology:ZBAR_I25
                   config:ZBAR_CFG_ENABLE
                       to:0];
    [scanner setSymbology:ZBAR_QRCODE
                   config:ZBAR_CFG_ENABLE
                       to:0];

    [reader setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
    [self presentModalViewController:reader
                            animated:YES];
    [reader release];
    //[self playBeep];
    }

-(void)imagePickerController:(UIImagePickerController *)picker     didFinishPickingMediaWithInfo:(NSDictionary *)info {
    id<NSFastEnumeration> results = [info objectForKey:ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for (symbol in results)
        break;
    NSString *barcode = symbol.data;

    UINavigationController *searchNavController = [[self viewControllers] objectAtIndex:1];
    WLSearchViewController *searchVC = [searchNavController.viewControllers objectAtIndex:0];

    //    WLSearchViewController *searchVC = [[self viewControllers] objectAtIndex:1];
    //[searchNavController popToRootViewControllerAnimated:NO];
    [self setSelectedViewController:searchNavController];
    [self dismissModalViewControllerAnimated:YES];

    [self playBeep];

    [searchVC handleSearchForTerm:barcode];
}

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [self dismissModalViewControllerAnimated:YES];
}

Answer 1

发现了什么问题，我想发布这篇文章是为了帮助其他任何正面对此问题的人。

我覆盖了一个viewDidAppear：animated：在我的tabBarController中，但我没有调用[super viewDidAppear:animated:]

补充说，一切都更好！