ios - 从任何其他类的 Controller 中删除 View ？

Question

我有三个屏幕:Google map 、设置、登录。默认情况下，Google map 可见。当我想显示设置屏幕时，我不会移至设置 View Controller ，我只是将“设置”屏幕添加为“Google”的 subview map “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，我转到登录屏幕

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

但是设置屏幕仍然位于登录屏幕后面，但没有删除。我尝试了两种场景

1.我尝试在进入登录屏幕之前删除设置 View

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

但它没有移至登录屏幕。

2.当我移动到登录屏幕后尝试删除设置 View 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，但不会删除设置 View

所以我想为什么不从登录屏幕中删除Google map 屏幕的 subview ，即设置屏幕，但我不知道如何删除Google map screen subview ，即设置屏幕。请指导如何执行此操作？

Answer 1

改变这个

[self.view removeFromSuperview];

去尝试

[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 View 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];
    }
  }