Always show UISearchbar

In UIViewController, the underlying View is usually the property view.
If you addSubview: something in this view, the view will be at the front.

In other words, the last view you addSubview: is the front page, but you may also trigger user events after the initial display of the screen.

Here, bringSubviewToFront: is the method that puts View at the forefront.
This method allows you to put the SubView on the front page of the View.

As a solution to the question, I suggest that you call the view property addSubview: when it is addedSubview:

First, replace the properties view of the subclass of the UIViewController with the following UIView subclass:(on xib, storyboard, loadView, etc.)

@interfaceMyView:UIView
// View you want to keep at the front
@property(nonatomic,weak)UIView*frontView;
@end

@implementation MyView
// addSubview—Called when done
- (void)didAddSubview: (UIView*)subview
{
    // put at the forefront of
    if(self.frontView){
        [selfbringSubviewToFront:self.frontView];
    }
}

@end

A View (UISearchbar in this case) desired to be placed at the front is then set to the property frontView of the class when generating.(See below)

[(MyView*)self.view setFrontView:searchbar];

This causes didAdSubview: to be called each time addSubview: is addSubview: of the configured ViewController, and the View set to frontView is at the forefront.