UISearchBar increases navigation bar height in iOS 11

Question

I have my UISearchBar being part of the navigation bar like:

 let searchBar = UISearchBar()
 //some more configuration to the search bar
 .....
         


        

Answer 1

I couldn't use the solution of keeping the navBar at 44. So it took me a day but finally, I found a solution that doesn't change the bar height and position the button in the middle of the bar. The issue is that the buttons are placed in a stack view which is configured as Horizontal stack view and therefore doesn't adjust to the height change.

This is done on init:

UIBarButtonItem *cancelButton;
if (@available(iOS 11.0, *)) {
    // For iOS11 creating custom button to accomadate the change of navbar + search bar being 56 points
    self.navBarCustomButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.navBarCustomButton setTitle:@"Cancel"];
    [self.navBarCustomButton addTarget:self action:@selector(cancelButtonTapped) forControlEvents:UIControlEventTouchUpInside];
    cancelButton = [[UIBarButtonItem alloc] initWithCustomView:self.navBarCustomButton];
} else {
    cancelButton = [[UIBarButtonItem alloc] initWithTitle:MagicLocalizedString(@"button.cancel", @"Cancel")
                                                                                         style:UIBarButtonItemStylePlain
                                                                                        target:self
                                                                                        action:@selector(cancelButtonTapped)];
}

on viewWillApear (or anytime after the view was added to the navigation stack)

   if (@available(iOS 11.0, *)) {
        UIView *buttonsStackView = [navigationController.navigationBar subviewOfClass:[UIStackView class]];
        if (buttonsStackView ) {
            [buttonsStackView.centerYAnchor constraintEqualToAnchor:navigationController.navigationBar.centerYAnchor].active = YES;
            [self.navBarCustomButton.heightAnchor constraintEqualToAnchor:buttonsStackView.heightAnchor];
        }
    }

And subviewOfClass is a category on UIView:

- (__kindof UIView *)subviewOfClass:(Class)targetClass {
     // base case
     if ([self isKindOfClass:targetClass]) {
        return self;
     }

     // recursive
    for (UIView *subview in self.subviews) {
        UIView *dfsResult = [subview subviewOfClass:targetClass];

        if (dfsResult) {
           return dfsResult;
       }
   }
   return nil;
}