始终在UISearchBar中显示取消按钮

Question

I use a table view with a UISearchDisplayController in conjunction with a UISearchBar . The search bar automatically hides the cancel button when inappropriate, but I'm using the view controller in a modal state - so I would like to always show the cancel button and use it to pop the modal view controller when the search is cancelled.

Is there a way to force the cancel button to stay visible without creating a custom search bar?

Answer 1

you should use the display delegate

- (void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller 
{
    controller.searchBar.showsCancelButton = YES;
}

Answer 2

this works

- (void) searchDisplayControllerDidEndSearch:(UISearchDisplayController *)controller
{    
    controller.searchBar.showsCancelButton = YES;
}

Answer 3

I found a solution after searching a lot.

It currently works for me. After adding in the code, I changed the class in Interface Builder to use the class instead of UISearchBar . I also have "Shows Cancel Button" enabled.

The code:

//NoAnimatingSearchBar.h
@interface NoAnimatingSearchBar : UISearchBar

@end

//NoAnimatingSearchBar.m
#import "NoAnimatingSearchBar.h"

@implementation NoAnimatingSearchBar

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (void) _destroyCancelButton {
    NSLog(@"_destroyCancelButton");
}

-(void)_setShowsCancelButton:(BOOL)showsCancelButton {
    NSLog(@"_setShowsCancelButton:(BOOL)showsCancelButton");
}
@end