ios - 导航栏颜色未保存

Question

我有带有两个不同导航栏的 View Controller 。每个导航栏都有不同的颜色。

VC1 and VC2

如果我从 VC1 移到 VC2，我会看到不同的颜色，但如果移回，我会在 VC2 的 VC1 导航栏中看到颜色。

View Controller 1 Returned

所以 VC1 的导航栏颜色没有正确保存

VC1:

import UIKit

class TableViewController_1: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.navigationBar.barTintColor = UIColor(red: 56.0/255.0, green: 208.0/255.0, blue: 125.0/255.0, alpha: 1.00)

        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem()
    }

VC2:

import UIKit

class TableViewController_2: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
         self.navigationController?.navigationBar.barTintColor = UIColor(red: 105.0/255.0, green: 28.0/255.0, blue: 56.0/255.0, alpha: 1.00)

        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem()
    }

如何在VC1中固定导航条颜色？谢谢你的帮助!

Answer 1

不要在 viewDidLoad 中更改导航栏的颜色，而是在 viewWillAppear 中执行:

VC1

override func viewWillAppear(_ animated: Bool) {
        self.navigationController?.navigationBar.barTintColor = UIColor(red: 56.0/255.0, green: 208.0/255.0, blue: 125.0/255.0, alpha: 1.00)
    }

VC2

override func viewWillAppear(_ animated: Bool) {
        self.navigationController?.navigationBar.barTintColor = UIColor(red: 105.0/255.0, green: 28.0/255.0, blue: 56.0/255.0, alpha: 1.00)
    }