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我有一个类，它是包含4个子viewController的UITabBarController的子类。我添加了一个类似于RedLaser，Instagram，Path，DailyBooth和其他应用程序的按钮。我的是喜欢这里的顶部例如：从UITabBarController呈现的Modal viewController
此按钮调用在TabBarController的方法呈现一个模式的viewController。当它被解散时，当前所选viewController中的NavigationControllers开始出现奇怪的行为。流行动画全部搞砸了，其他小错误发生，直到您选择tabBar上的另一个选项卡。然后，动画很好，直到viewController再次呈现。
我确定这是因为我错误地解雇了它，但我不确定这是如何完成的。
这是我在TabBarController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];
}