Swift & Navigation : Navigation Bar changes its background color when scroll the view-CodePudding

I have 2 ViewControllers embedded in a Navigation Controller shown in the picture below.

Every time I scroll through my table item, the navigation background color keeps changing along with the status bar background color.

How do I set the backgroundColor of my navigation bar and status bar programmatically?

Code:

import UIKit

class TestViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var tableView: UITableView!
    
    let faqList : [FAQ] = [
        FAQ(title: "Test 1", content: "Answer 1"),
        FAQ(title: "Test 2", content: "Answer 2"),
        FAQ(title: "Test 3", content: "Answer 3"),
        FAQ(title: "Test 4", content: "Answer 4"),
        FAQ(title: "Test 5", content: "Answer 5"),
        FAQ(title: "Test 6", content: "Answer 6"),
        FAQ(title: "Test 7", content: "Answer 7"),
        FAQ(title: "Test 8", content: "Answer 8"),
        FAQ(title: "Test 9", content: "Answer 9"),
        FAQ(title: "Test 10", content: "Answer 10"),
        FAQ(title: "Test 11", content: "Answer 11"),
        FAQ(title: "Test 12", content: "Answer 12"),
        FAQ(title: "Test 13", content: "Answer 13"),
        FAQ(title: "Test 14", content: "Answer 14"),
    ]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.delegate = self
        tableView.dataSource = self

        tableView.backgroundColor = UIColor(named: "BackgroundColor")
        tableView.register(UINib(nibName: "ButtonTableViewCell", bundle: nil), forCellReuseIdentifier: "ButtonCell")
        self.navigationController?.navigationBar.backgroundColor = .blue
    }
}

extension TestViewController: UITableViewDelegate {
    
}

extension TestViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return faqList.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "ButtonCell", for: indexPath) as! ButtonTableViewCell
        let buttonCell = faqList[indexPath.row]
        cell.titleLabel.text = buttonCell.title
        cell.trailingIconBackground.isHidden = true

        cell.buttonView.backgroundColor = .brown
        cell.buttonView.layer.cornerRadius = 10
        cell.buttonView.layer.masksToBounds = true

        cell.selectionStyle = UITableViewCell.SelectionStyle.none
        
        return cell
    }
}

CodePudding user response：

Try change translucent property of navigation bar.

self.navigationController?.navigationBar.isTranslucent = false

CodePudding user response：

In IOS 15, UINavigationBar uses scrollEdgeAppearance which has a transparent backgroundcolor by default and its triggered when you scroll to view . you need to set a spesific apperance for this like

   let appearance = UINavigationBarAppearance()
   appearance.backgroundColor = .blue
  navigationController?.navigationBar.scrollEdgeAppearance = appearance

CodePudding user response：

Just use below code. I fixed same issue:

// Below code will fix Navigation bar issue fixed for iOS 15.0
        if #available(iOS 15, *) {
            let appearance = UINavigationBarAppearance()
            appearance.configureWithOpaqueBackground()
            self.navigationController?.navigationBar.isTranslucent = true  // pass "true" for fixing iOS 15.0 black bg issue
            self.navigationController?.navigationBar.tintColor = UIColor.white // We need to set tintcolor for iOS 15.0
            appearance.shadowColor = .clear    //removing navigationbar 1 px bottom border.
            UINavigationBar.appearance().standardAppearance = appearance
            UINavigationBar.appearance().scrollEdgeAppearance = appearance
        }