How to move the UIToolBar
to top (stick to the UINavigationBar
)?
I m struggle with this thing for a long time and I've try some stuff like:
UIToolBar
that conforms to UIToolbarDelegate
and (UIBarPosition)positionForBar:(id <UIBarPositioning>)bar
get called and I return UIBarPositionTop
but the toolbar stays at bottom. self.navigationController.toolbar.frame = CGRectMake(0, NAV_BAR_Y, self.view.bounds.size.width, NAV_BAR_HEIGHT);
UINaviagtionController
which has this delegate function: (UIBarPosition)positionForBar:(id <UIBarPositioning>)bar { return UIBarPositionTop; }
(UIBarPosition)positionForBar:(id <UIBarPositioning>)bar { return UIBarPositionTop; }
None of the struggles goes well, same look:
Any Help will be great.
(I would like to have navigation look as Apple
App store
navigation)
There are 2 options that I'm aware of.
1) Related to Move UINavigationController's toolbar to the top to lie underneath navigation bar
You can subclass UINavigationController
and change the Y-axis position of the toolbar when the value is set.
import UIKit
private var context = 0
class NavigationController: UINavigationController {
private var inToolbarFrameChange = false
var observerBag: [NSKeyValueObservation] = []
override func awakeFromNib() {
super.awakeFromNib()
self.inToolbarFrameChange = false
}
override func viewDidLoad() {
super.viewDidLoad()
observerBag.append(
toolbar.observe(\.center, options: .new) { toolbar, _ in
if !self.inToolbarFrameChange {
self.inToolbarFrameChange = true
toolbar.frame = CGRect(
x: 0,
y: self.navigationBar.frame.height + UIApplication.shared.statusBarFrame.height,
width: toolbar.frame.width,
height: toolbar.frame.height
)
self.inToolbarFrameChange = false
}
}
)
}
override func setToolbarHidden(_ hidden: Bool, animated: Bool) {
super.setToolbarHidden(hidden, animated: false)
var rectTB = self.toolbar.frame
rectTB = .zero
}
}
2) You can create your own UIToolbar
and add it to view of the UIViewController
. Then, you add the constraints to the leading, trailing and the top of the safe area.
import UIKit
final class ViewController: UIViewController {
private let toolbar = UIToolbar()
private let segmentedControl: UISegmentedControl = {
let control = UISegmentedControl(items: ["Op 1", "Op 2"])
control.isEnabled = false
return control
}()
override func loadView() {
super.loadView()
setupToolbar()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationController?.navigationBar.hideBorderLine()
}
private func setupToolbar() {
let barItem = UIBarButtonItem(customView: segmentedControl)
toolbar.setItems([barItem], animated: false)
toolbar.isTranslucent = false
toolbar.isOpaque = false
view.addSubview(toolbar)
toolbar.translatesAutoresizingMaskIntoConstraints = false
toolbar.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
toolbar.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
toolbar.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
}
}
private extension UINavigationBar {
func showBorderLine() {
findBorderLine().isHidden = false
}
func hideBorderLine() {
findBorderLine().isHidden = true
}
private func findBorderLine() -> UIImageView! {
return self.subviews
.flatMap { $0.subviews }
.compactMap { $0 as? UIImageView }
.filter { $0.bounds.size.width == self.bounds.size.width }
.filter { $0.bounds.size.height <= 2 }
.first
}
}
Try this solution
@interface ViewController () <UIToolbarDelegate>
{
UIToolbar * lpToolbar;
}
@end
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
lpToolbar = [[UIToolbar alloc] initWithFrame :CGRectZero];
lpToolbar.delegate = self;
self.navigationItem.title = @"Title";
}
-(void) viewWillAppear :(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController.view addSubview :lpToolbar];
CGRect rFrame = self.navigationController.navigationBar.frame;
lpToolbar.frame = CGRectMake( 0.0, rFrame.origin.y + rFrame.size.height, rFrame.size.width, 50.0 );
}
-(void) viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[lpToolbar removeFromSuperview];
}
-(UIBarPosition) positionForBar:(id <UIBarPositioning>)bar
{
return UIBarPositionTop;
}
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