How to remove border of the navigationBar in swift?

Question

i've been trying to remove the navigationBars border without luck. I've researched and people seem to tell to set shadowImage and BackgroundImage to nil, but this does not work in my case.

My code

    self.navigationController?.navigationBar.barTintColor = UIColor(rgba: "#4a5866")
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(named: ""), forBarMetrics: UIBarMetrics.Default)
    self.navigationController?.navigationBar.shadowImage = UIImage(named: "")

illustration:

Answer 1

The trouble is with these two lines:

self.navigationController?.navigationBar.setBackgroundImage(UIImage(named: ""), forBarMetrics: UIBarMetrics.Default)
self.navigationController?.navigationBar.shadowImage = UIImage(named: "")

Since you don't have an image with no name, UIImage(named: "") returns nil , which means the default behavior kicks in:

When non-nil, a custom shadow image to show instead of the default shadow image. For a custom shadow to be shown, a custom background image must also be set with -setBackgroundImage:forBarMetrics: (if the default background image is used, the default shadow image will be used).

You need a truly empty image, so just initialize with UIImage() :

self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = UIImage()

Answer 2

Swift 4 & Swift 5

Removing border:

self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for:.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.layoutIfNeeded()

Restoring border:

self.navigationController?.navigationBar.setBackgroundImage(nil, for:.default)
self.navigationController?.navigationBar.shadowImage = nil
self.navigationController?.navigationBar.layoutIfNeeded()

Answer 3

With Swift 2 you can do it this way:

AppDelegate file

Inside func application(..., didFinishLaunchingWithOptions launchOptions:...)

UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarMetrics: .Default)

for Swift 3:

UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)

Answer 4

Just write this in the extension of UINavigationBar

extension UINavigationBar {

    func shouldRemoveShadow(_ value: Bool) -> Void {
        if value {
            self.setValue(true, forKey: "hidesShadow")
        } else {
            self.setValue(false, forKey: "hidesShadow")
        }
    }
}

And in your viewController...

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationController?.navigationBar.shouldRemoveShadow(true)        
}

And to get this undone for any viewController, just pass false.

Answer 5

this will remove the shadow image altogether

for parent in self.navigationController!.navigationBar.subviews {
 for childView in parent.subviews {
     if(childView is UIImageView) {
         childView.removeFromSuperview()
     }
 }
}

Answer 6

Swift 5

When using setBackgroundImage / shadowImage to hide the hairline, there's a slight delay. This method removes the delay. Credit to Chameleon Framework . This is the method they use (in ObjC)

extension UINavigationController {
    func hideHairline() {
        if let hairline = findHairlineImageViewUnder(navigationBar) {
            hairline.isHidden = true
        }
    }
    func restoreHairline() {
        if let hairline = findHairlineImageViewUnder(navigationBar) {
            hairline.isHidden = false
        }
    }
    func findHairlineImageViewUnder(_ view: UIView) -> UIImageView? {
        if view is UIImageView && view.bounds.size.height <= 1.0 {
            return view as? UIImageView
        }
        for subview in view.subviews {
            if let imageView = self.findHairlineImageViewUnder(subview) {
                return imageView
            }
        }
        return nil
    }
}

Answer 7

Set barStyle to .Black before setting the tint:

self.navigationController?.navigationBar.translucent = false
self.navigationController?.navigationBar.barStyle = .Black
self.navigationController?.navigationBar.barTintColor = UIColor.blueColor()

Answer 8

Luca Davanzo's answer is great, but it does not work in iOS 10. I altered it to work in iOS 10 and below.

for parent in navigationController!.view.subviews {
    for child in parent.subviews {
        for view in child.subviews { 
            if view is UIImageView && view.frame.height == 0.5 {
                view.alpha = 0
            }
        }
    }
}

You can also extend UINavigationController and call this off of that. removeFromSuperview() on the line will not work on iOS 10, so I just set the alpha to 0 so this one call is compatible everywhere.

Answer 9

To remove border from UINavigationBar in Swift 3+, use:

UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
UINavigationBar.appearance().isTranslucent = false

Answer 10

let navBarAppearance = UINavigationBarAppearance()
navBarAppearance.configureWithTransparentBackground()

Answer 11

for swift 3

in viewDidLoad method

navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
navigationController?.navigationBar.shadowImage = UIImage()

Answer 12

Only this worked for me,

self.navigationController?.navigationBar.shadowImage = UIImage()

Ref

Answer 13

Updated for Swift 4 in case someone is wondering

navigationBar.shadowImage = UIImage()
navigationBar.backIndicatorImage = UIImage()

It's even less verbose now.

Answer 14

Swiftier method of Jack Chen:

extension UINavigationController {

    var isHiddenHairline: Bool {
        get {
            guard let hairline = findHairlineImageViewUnder(navigationBar) else { return true }
            return hairline.isHidden
        }
        set {
            if let hairline = findHairlineImageViewUnder(navigationBar) {
                hairline.isHidden = newValue
            }
        }
    }

    private func findHairlineImageViewUnder(_ view: UIView) -> UIImageView? {
        if view is UIImageView && view.bounds.size.height <= 1.0 {
            return view as? UIImageView
        }

        for subview in view.subviews {
            if let imageView = self.findHairlineImageViewUnder(subview) {
                return imageView
            }
        }

        return nil
    }
}

Using:

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.isHiddenHairline = true
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        navigationController?.isHiddenHairline = false
    }

Answer 15

This is the way if you want to do it without changing the background color:

// Remove the border ImageView from the NavigationBar background
func hideBottomBorder() {
    for view in navigationBar.subviews.filter({ NSStringFromClass($0.dynamicType) == "_UINavigationBarBackground" }) as [UIView] {
        if let imageView = view.subviews.filter({ $0 is UIImageView }).first as? UIImageView {
            imageView.removeFromSuperview()
        }
    }
}

NOTE: This might crash on a production app. Apparently the NavigationBar doesn't like its view disappearing

Answer 16

The accepted answer worked for me but I noticed when I wanted the shadow image to reappear when popping back or pushing forward to another vc there was a noticeable blink in the navigation bar.

Using this method navigationController?.navigationBar.setValue(true, forKey: "hidesShadow") in viewWillAppear the shadow bar is hidden in the current visible view controller.

Using these 2 methods

navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
navigationController?.navigationBar.setValue(false, forKey: "hidesShadow")

in viewWillDisappear the blink still happens but only when the shadow image reappears and not the navigation bar itself.

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    // 1. hide the shadow image in the current view controller you want it hidden in
    navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
    navigationController?.navigationBar.layoutIfNeeded()
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(true)

    // 2. show the shadow image when pushing or popping in the next view controller. Only the shadow image will blink
    navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
    navigationController?.navigationBar.setValue(false, forKey: "hidesShadow")
    navigationController?.navigationBar.layoutIfNeeded()
}

Answer 17

If you want to remove only the bottom line and keep the solid color of navigationBar, add these lines of code in viewDidLoad: Swift 3, 4:

navigationController?.navigationBar.shadowImage = UIImage()
navigationController?.navigationBar.isTranslucent = false

Peace!

Answer 18

in your custom navigationController add these lines:

self.navigationBar.setBackgroundImage(UIImage(), for:.default)
self.navigationBar.shadowImage = UIImage()
self.navigationBar.layoutIfNeeded()

Important Note

the last line is important if you use the first line viewDidLoad() method because navigationController should redraw nav bar but easily you can use this without layoutIfNeeded() in the viewWillAppear() method before it draws the nav bar

Answer 19

For iOS 13+:

let appearance = UINavigationBarAppearance()
appearance.shadowColor = .clear

Assign this appearance to the UINavigationBar :

navigationController?.navigationBar.standardAppearance = appearance
navigationController?.navigationBar.scrollEdgeAppearance = appearance
navigationController?.navigationBar.compactAppearance = appearance

Setting shadowImage = UIImage() didn't work for me.

Answer 20

Within AppDelegate , this has globally changed the format of the NavBar and removes the bottom line/border:

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarPosition: UIBarPosition.Any, barMetrics: UIBarMetrics.Default)
    UINavigationBar.appearance().shadowImage = UIImage()
    UINavigationBar.appearance().tintColor = UIColor.whiteColor()
    UINavigationBar.appearance().barTintColor = UIColor.redColor()
    UINavigationBar.appearance().translucent = false
    UINavigationBar.appearance().clipsToBounds = false
    //UINavigationBar.appearance().backgroundColor = UIColor.redColor()
    UINavigationBar.appearance().titleTextAttributes = [NSFontAttributeName : (UIFont(name: "FONT NAME", size: 18))!, NSForegroundColorAttributeName: UIColor.whiteColor()] }

Haven't managed to implement anything different on a specific VC, but this will help 90% of people

Answer 21

for the swift3 you should write slightly different way:

 self.navigationController?.navigationBar.setBackgroundImage(UIImage(),
    for: UIBarMetrics.default)
   self.navigationController?.navigationBar.shadowImage = UIImage()

Answer 22

This is a streamlined version of Gaurav Chandarana 's answer.

extension UINavigationBar {

    func hideShadow(_ value: Bool = true) {
        setValue(value, forKey: "hidesShadow")
    }
}

Answer 23

App delegate

UINavigationBar.appearance().setBackgroundImage(UIImage(), for: UIBarMetrics.default)
UINavigationBar.appearance().shadowImage = UIImage()

Answer 24

I use this code in AppDelegate's didFinishLaunchingWithOptions method to reach it in whole app:

 let barAppearance = UINavigationBar.appearance()
    
 if #available(iOS 13, *) {
     let appearance = UINavigationBarAppearance()
     appearance.configureWithTransparentBackground()
     barAppearance.standardAppearance = appearance
     barAppearance.scrollEdgeAppearance = appearance
 } else {
     barAppearance.setBackgroundImage(UIImage(), for: UIBarPosition.any, barMetrics: UIBarMetrics.defaultPrompt)
     barAppearance.shadowImage = UIImage()
 }

Answer 25

The border line is an UIImageView and removing a subview which is an imageView will remove barButtonItems with UIImageView. Below code will help you remove it. Hope this helps someone who faced an issue like me.

for parent in self.navigationController!.navigationBar.subviews {
        for childView in parent.subviews {
            if childView.frame.height == 0.5 {
                childView.removeFromSuperview()
            }
        }
    }

The border UIImageView is only 0.5 in height so this code removes only that.

Answer 26

this is the answer in swift 3 base of Nate Cook answer

   self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
    self.navigationController?.navigationBar.shadowImage = UIImage()

Answer 27

iOS 11 和 Swift 4如果要删除边框但不要使导航栏半透明，则应尝试以下操作
self.navigationBar.shadowImage = UIImage()

Answer 28

I am using Xcode 14.2. If you want to do this using Xcode UI, then select the Navigation controller, then Navigation Bar, then Attributes Inspector and Under Scroll Edge Appearance, set the Shadow Color to clear color.

Answer 29

Swift 11.4

I was customizing UINavigationController so accessing through self.navigationController?.navigationBar didn't work for me, but using direct in:

self.navigationBar.setBackgroundImage(UIImage(), for:.default)
self.navigationBar.shadowImage = UIImage()
self.navigationBar.layoutIfNeeded()

Answer 30

I found changing the navigation bar shadow color to Clear from the activity inspector to solve this issue

[ changing the navigation bar shadow color****strong text ][1]

[1]: https://i.stack.imgur.com/i3Kdo.png***strong text***