在 for 循环中创建多个 webviews swift

Question

我正在尝试显示 5 个 web 视图，并且我希望在 for 循环中创建 web 视图。 我目前使用的代码只创建一个 web 视图，它应该为页面中的每个 url 创建一个视图。 任何帮助，将不胜感激！

import UIKit
import Foundation
import WebKit
import AVFoundation

class displayviews: UIViewController, WKUIDelegate {
    
    var pages = ["https://example.com", "https://example", "https://example", "https://example.com", "https://example.com"]
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        for i in pages{
            var inti = Int(i) ?? 0
            //var currentwebview = String("webView") + i
            let myWebView:WKWebView = WKWebView(frame: CGRect(x:0, y:CGFloat(inti*200), width: UIScreen.main.bounds.width, height:UIScreen.main.bounds.height/CGFloat(pages.count)))
            myWebView.uiDelegate = self
            self.view.addSubview(myWebView)
            //1. Load web site into my web view
            let myURL = URL(string: pages[inti])
            let myURLRequest:URLRequest = URLRequest(url: myURL!)
            myWebView.load(myURLRequest)
        }
    }
}

Answer 1

您的代码正在创建 5 个 webview，问题是它们被放置在彼此之上，因此您只能看到最上面的一个。 您可以使用以下示例中的 stackview 或在 webviews 上设置约束。

class ViewController: UIViewController, WKUIDelegate {
    
    var pages = ["https://example.com", "https://example.com", "https://example.com", "https://example.com", "https://example.com"]
    
    lazy var stackView: UIStackView = {
        let view = UIStackView()
        view.axis = .vertical
        view.translatesAutoresizingMaskIntoConstraints = false
        view.distribution = .fillEqually
        self.view.addSubview(view)
        NSLayoutConstraint.activate([
            view.leftAnchor.constraint(equalTo: self.view.leftAnchor),
            view.topAnchor.constraint(equalTo: self.view.topAnchor),
            view.rightAnchor.constraint(equalTo: self.view.rightAnchor),
            view.bottomAnchor.constraint(equalTo: self.view.bottomAnchor)
        ])
        return view
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        for i in pages{
            var inti = Int(i) ?? 0
            //var currentwebview = String("webView") + i
            let myWebView:WKWebView = WKWebView(frame: CGRect(x:0, y:CGFloat(inti*200), width: UIScreen.main.bounds.width, height:UIScreen.main.bounds.height/CGFloat(pages.count)))
            myWebView.uiDelegate = self
            //self.view.addSubview(myWebView)
            stackView.addArrangedSubview(myWebView)
            //1. Load web site into my web view
            let myURL = URL(string: pages[inti])
            let myURLRequest:URLRequest = URLRequest(url: myURL!)
            myWebView.load(myURLRequest)
        }
        
    }
}