之后dismissModalViewControllerAnimated：我的标签栏消失 [英] After dismissModalViewControllerAnimated: my tabbar disappears

问题描述

我有一个由三层视图控制器组成的应用程序：UITabBarController => UINavigationController => UIViewController。它们都是在代码中生成的，而不是使用IB。按照通常的设计指南，选项卡栏位于底部。在我的UIViewController我使用这个代码来呈现modalViewController：

  myModalVC = [[MyModalViewController alloc] init]; 
 [self.navigationController presentModalViewController：myModalVC animated：YES]; 
  

这个工作很好，模态视图控制器弹出并覆盖整个屏幕。

$然而，当在模态视图控制器中按下按钮时，我运行这个：

  [self dismissModalViewControllerAnimated：YES]; 
  

模态视图控制器动画。但是我可以看到原始的UIViewcontroller视图，但标签栏完全消失。我已经google了很多，但我找不到任何人有同样的问题。

解决方案

实际上，我通过googling多了一点。我使我的标签栏控制器是应用程序委托的属性，当它提供模态vc时，它会这样

  UIApplication * myApp = [UIApplication sharedApplication]; 
 noIBAppDelegate * appDelegate =（noIBAppDelegate *）myApp.delegate; 
 [appDelegate.tabBarController presentModalViewController：myModalVC animated：YES]; 
  

  UIApplication * myApp = [UIApplication sharedApplication]; 
 noIBAppDelegate * appDelegate =（noIBAppDelegate *）myApp.delegate; 
 [appDelegate.tabBarController dismissModalViewControllerAnimated：YES]; 
  

这将修复标签栏消失。

I have an app which consists of three layers of view controllers: UITabBarController => UINavigationController => UIViewController. They are all generated in code rather than using IB. The tab bar is on the bottom as per the usual design guidelines. In my UIViewController I am using this code to present the modalViewController:

myModalVC = [[MyModalViewController alloc] init];
[self.navigationController presentModalViewController:myModalVC animated:YES];

This work fine and the modal view controller pops up and covers the entire screen.

However when a button is pressed within the modal view controller, I run this:

[self dismissModalViewControllerAnimated:YES];

And the modal view controller animates away. However I can see the original UIViewcontroller view but the tab bar disappears completely. I've googled a lot but I can't find anyone that has this same problem.

解决方案

Actually I found this by googling a bit more. I made my tab bar controller a property of the app delegate and when it presents the modal vc, it does this

UIApplication *myApp = [UIApplication sharedApplication];
noIBAppDelegate*appDelegate = (noIBAppDelegate*)myApp.delegate;
[appDelegate.tabBarController presentModalViewController:myModalVC animated:YES];

Then it dismisses it by this bit of code

UIApplication *myApp = [UIApplication sharedApplication];
noIBAppDelegate*appDelegate = (noIBAppDelegate*)myApp.delegate;
[appDelegate.tabBarController dismissModalViewControllerAnimated:YES];

This fixes the the tab bar disappearing.

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