我忽略 Storyboard并在 AppDelegate.swift
中创建 UINavigationController
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
window?.rootViewController = UINavigationController(rootViewController: HomeController(collectionViewLayout: layout))//make the ViewController class to be the root
return true
}
我有 leftBarButton
切换到另一个 UINavigationController
或 UICollectionViewController
(根据您的建议)
override func viewDidLoad() {
super.viewDidLoad()
let parentMenuButton = UIButton(frame: CGRect(x: 0, y: 0, width: 34, height: 34))
parentMenuButton.addTarget(self, action: #selector(self.menuButtonOnClicked), for: .touchUpInside)
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: parentMenuButton)
}
@objc func menuButtonOnClicked(){
print("menuButtonOnClicked button is pressed")
}
如何以编程方式实现这一点?(通过按菜单按钮切换另一个导航区域)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let secondViewController = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
self.navigationController!.pushViewController(secondViewController, animated: true)
错误:
由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:“Storyboard () 不包含标识符为‘SecondViewController’的 View Controller ”
我创建了 SecondViewController:
import UIKit
class SecondViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
}
有没有办法在不弄乱 Storyboard 的情况下做到这一点?(仅以编程方式)
最佳答案
您需要在 menuButtonOnClicked()
中调用 push 方法
@objc func menuButtonOnClicked(){
print("menuButtonOnClicked button is pressed")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let secondViewController = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as SecondViewController
self.navigationController.pushViewController(secondViewController, animated: true)
}
关于ios - 以编程方式快速切换另一个导航,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53447780/