无法删除UISearchBar

Question

我创建了SearchBarView，这是UIView的子类，并将UISearchBar作为子视图添加到其中。在SearchBarView上调用removeFromSuperview (从searchBarSearchButtonClicked)后，UISearchBar不会消失。我试图从我创建SearchBarView的地方调用SearchBarView上的removeFromSuperview，但没有帮助。你知道为什么吗？

#import <UIKit/UIKit.h>
@interface SearchBarView : UIView <UISearchBarDelegate> {
    UISearchBar *querySearchBar;
}
@end

#import "SearchBarView.h"
@implementation SearchBarView
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        querySearchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0,0,frame.size.width,44)];
        querySearchBar.delegate = self;
        [self addSubview:querySearchBar];
    }
    return self;
}

#pragma mark -
#pragma mark UISearchBarDelegate methods
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    [self removeFromSuperview];    
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{   
    searchBar.text = @""; 
    [searchBar resignFirstResponder];
    [searchBar setShowsCancelButton:NO animated:YES]; 
}

- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar
{  
    [searchBar setShowsCancelButton:NO animated:YES]; 
    return YES;   
}  

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar
{  
    [searchBar setShowsCancelButton:YES animated:YES];  
    return YES;    
}  
@end

SearchBarView的创建方式如下：

SearchBarView *searchBarView = [[SearchBarView alloc] initWithFrame:CGRectMake(0, 0, 480, 300)];
UIView *rootView = [[[[UIApplication sharedApplication] delegate] window] rootViewController].view;
[rootView addSubview:searchBarView];

Answer 1

你的问题是

[self addSubview:querySearchBar];

如果您将searchcontroller添加到子视图，则当您执行这些操作时，它将不起作用。

[searchController.searchBar removeFromSuperview()]

self.definesPresentationContext = true

searchController.active = false

我建议你做

presentViewController(searchController, animated: true, completion: nil)

然后试着打发searchController

[searchController.searchBar removeFromSuperview()]

Answer 2

试一试

[searchbar removefromsuperview];