从任何其他类的控制器中删除视图？

Posted 2023-03-22

【中文标题】从任何其他类的控制器中删除视图？

【英文标题】：Remove a view from controller from any other class?

【发布时间】：2016-08-11 09:36:44

【问题描述】：

我有三个屏幕谷歌地图，设置，登录。默认情况下谷歌地图是可见的。当我想显示设置屏幕时，我不会移动到设置视图控制器，我只是将“设置”屏幕添加为“谷歌”的子视图地图"屏幕。

 menusettings=[self.storyboard instantiateViewControllerWithIdentifier:@"SET"];
 [menusettings.view setFrame:CGRectMake(0, 0, 700,600)];
 [self.view addSubview:menusettings.view];

更新设置后，我移动到登录屏幕

 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"iPhone" bundle:nil];
 UINavigationController *ppc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"LOGIN"];
[self presentViewController:ppc animated:true completion:nil];

但是设置屏幕仍然在登录屏幕之后，但它没有被删除。我尝试了两个场景

1.我尝试在进入登录屏幕之前删除设置视图

 [self.view removeFromSuperview];
 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"PRG_iPhone" bundle:nil];
 UINavigationController *ppc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"LOGIN"];
 [self presentViewController:ppc animated:true completion:nil];

但它不会移动到登录屏幕。

2.当我移动到登录屏幕后尝试删除设置视图时

  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"PRG_iPhone" bundle:nil];
     UINavigationController *ppc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"LOGIN"];
     [self presentViewController:ppc animated:true completion:nil];
     [self.view removefromsuperview];

然后它移动到登录屏幕但不删除设置视图

所以我想为什么不从 登录屏幕 中删除谷歌地图屏幕的子视图，它是 设置屏幕，但我不知道如何删除 谷歌地图屏幕子视图是设置屏幕。请指导如何做到这一点？

【问题讨论】：

你想隐藏菜单设置视图吗？

我想从superview中删除菜单设置。当登录屏幕出现时它已经隐藏了

【参考方案1】：

改变这个

[self.view removeFromSuperview];

去试试

[menusettings.view removeFromSuperview];

更新

  [menusettings.view removeFromSuperview];
 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"PRG_iPhone" bundle:nil];
 UINavigationController *ppc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"LOGIN"];
 [self presentViewController:ppc animated:true completion:nil];

选择 1

[self.view.subviews makeObjectsPerformSelector: @selector(removeFromSuperview)];

选择-2

最初为您的视图分配标签，例如

menusettings=[self.storyboard instantiateViewControllerWithIdentifier:@"SET"];
[menusettings.view setFrame:CGRectMake(0, 0, 700,600)];
 menusettings.tag = 5; //you can use any number you like
[self.view addSubview:menusettings.view];

移除

 UIView *Remove = [self.view viewWithTag:5];
[Remove removeFromSuperview];
  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"PRG_iPhone" bundle:nil];
 UINavigationController *ppc = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"LOGIN"];
 [self presentViewController:ppc animated:true completion:nil];

选择 3

 for (UIView *subVie in self.view.subviews)

    if (subVie.tag == 5) 
    
        [subVie removeFromSuperview];
    
  

【讨论】：

但是我在设置类中写 [self.view removefromsuperview] 那么我该如何写 [menusettings.view removefromsuperview];

@deepakkumar - 检查 Choice-1 答案

它的作用是从谷歌地图屏幕中删除所有视图。您会看到谷歌地图屏幕已经有视图。应该只删除设置屏幕而不是所有视图。因此使用您的代码它会使谷歌地图屏幕变白

@deepakkumar - 它删除所有子视图，您只需要删除正确的菜单视图

@deepakkumar - 尝试选择 -2