从子视图控制器切换到父视图控制器 - iOS

Question

我有一个主要的动作视图控制器，并在那里有按钮“审查”。评论按钮的功能是：

- (IBAction)btnReview:(id)sender 
{ 
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil]; 
    [self addChildViewController:vc]; 
    [vc didMoveToParentViewController:self]; 
    [self.view addSubview:vc.view]; 
} 

现在在审查页面，我有一个按钮。在该按钮的操作上，我想切换回父视图控制器。应该显示它的视图。我试过下面的代码，它会暂停或崩溃应用程序。

[self didMoveToParentViewController:nil]; 
[self.view removeFromSuperview]; 
[self removeFromParentViewController]; 

我甚至尝试：

[self dismissModalViewControllerAnimated:YES] 

我已阅读有关这个​​问题以及其他的职位，但未能找到满意的答案。请帮忙！

Answer 1

听起来像你要找的可以照顾一个UINavigationController。只需使用pushViewController:即可将新视图推送到屏幕上。然后，返回按钮将出现在视图顶部的导航栏中，该按钮可用于返回到“父级”视图控制器。

请参阅documentation。

Answer 2

您应该使用委派。当您点击ReviewViewController按钮，你可以调用的方法等：[self.delegate hideReviewController:self];

而且这种方法看起来是这样的：

- (void)hideReviewController:(ReviewViewController *)controller { 
       [UIView animateWithDuration:0.3 
            delay:0 
           options:UIViewAnimationOptionCurveEaseInOut 
          animations:^{ 
            controller.view.alpha = 0; 
          } completion:^(BOOL finished) { 
            [self.view removeSubview:controller.view]; 
            // If you want the Review Controller to be deallocated: 
            [self removeChildViewController:controller]; 
          }]; 
} 

编辑： 在你ReviewDelegate.h文件中加入：

@class ReviewViewController; 

@protocol ReviewDelegate <NSObject> 
- (void)hideReviewController:(ReviewViewController *)controller; 
@end 

然后添加该属性：

@property (nonatomic, weak) id <ReviewDelegate> delegate; 

在父类：

- (IBAction)btnReview:(id)sender 
{ 
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil]; 
    vc.delegate = self; 
    [self addChildViewController:vc]; 
    [vc didMoveToParentViewController:self]; 
    [self.view addSubview:vc.view]; 
} 

    - (void)hideReviewController:(ReviewViewController *)controller { 
        [UIView animateWithDuration:0.3 
             delay:0 
            options:UIViewAnimationOptionCurveEaseInOut 
           animations:^{ 
             controller.view.alpha = 0; 
           } completion:^(BOOL finished) { 
             [self.view removeSubview:controller.view]; 
             // If you want the Review Controller to be deallocated: 
             [self removeChildViewController:controller]; 
           }]; 
    } 

我也建议你阅读delegation

Answer 3

你并不需要让复杂的...只是使用UINavigationController。

要导航从ParentVC到ChildVC：

ChildViewController *ChildVC = [[ChildViewController alloc]initWithNibName:@"ChildViewController" bundle:nil]; 
[self.navigationController pushViewController:ChildVC animated:YES]; 

而对于导航从ChildVC回ParentVC：

ParentViewController *ParentVC = [[ParentViewController alloc]initWithNibName:@"ParentViewController" bundle:nil]; 

[self.navigationController popViewControllerAnimated:YES]; 

Answer 4

既然你要添加的子视图作为一个子视图到父，你需要手动它从它的超级视图（在你的情况下，父视图）。而不是将其添加为一个子视图，您可以利用presentViewController方法如下：

- (IBAction)btnReview:(id)sender 
    { 

    ReviewViewController *vc = [[ReviewViewController alloc] initWithNibName:@"ReviewViewController" bundle:nil]; 
    [self presentViewController:vc 
         animated:YES 
        completion:nil]; 
    } 

，并在后退按钮子类代码将是：

-(IBAction)backButtonClicked:(id)sender 
    { 
     [self dismissViewControllerAnimated:YES completion:nil]; 
    } 

Answer 5

我假定这是您正在尝试构建的自定义视图控制器容器，“self”是您正在讨论的主要操作视图控制器。

试试这个：

- (IBAction)btnReview:(id)sender 
{ 
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil]; 

    [self addChildViewController:vc]; 

    [self.view addSubview:vc.view]; 

    [vc didMoveToParentViewController:self]; 

    vc = nil; 

} 

对于 “返回” 按钮，我假设这是返回，从审查的viewController主要处理措施的viewController按钮，试试这个：

- (IBAction)btnReviewHide:(id)sender 
{ 

    [self willMoveToParentViewController:nil]; 
    [self.view removeFromSuperview]; 
    [self removeFromParentViewController]; 

} 

希望这可以帮助。

Answer 6

试试这个

self.view=nil; 
[self willMoveToParentViewController:nil]; 
[self.view removeFromSuperview]; 
[self removeFromParentViewController]; 

Answer 7

只写

- (IBAction)backbutton:(id)sender { 
    [self.navigationController popToRootViewControllerAnimated:YES]; 
} 

曾在我的情况下