UISearchDisplayController 自定义取消按钮标题

#pragma UISearchDisplayDelegate

-(void)searchDisplayControllerWillBeginSearch:(UISearchDisplayController *)controller{

    [mySearchBar setShowsCancelButton:YES animated:NO];

    UIView *topView = controller.searchBar.subviews[0];

    

    for (UIView *subView in topView.subviews) {

        if ([subView isKindOfClass:NSClassFromString(@"UINavigationButton")]) {

            UIButton *cancelButton = (UIButton*)subView;

            [cancelButton setTitle:@"取消" forState:UIControlStateNormal];

        }

    }

}