Question

我创建了一个非常简单的IOS应用程序（Swift 5）。只是一个WKWebView，它加载了我的PWA网址。

除所有<a href="mailto:name@name.com">Mail me</a>链接外，其他所有内容均正常运行。当我单击它们时，什么也没有发生，我的邮件应用程序无法打开。

这是我的ViewController.swift的代码。请帮助，谢谢...

//
//  ViewController.swift
//  panel
//
//  Created by kevin on 25/07/2019.
//  Copyright © 2019 umono. All rights reserved.
//

import UIKit
import WebKit

class ViewController: UIViewController, WKUIDelegate {

    var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let myURL = URL(string:"https://someUrlToMyApp.appspot.com")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)

        if #available(iOS 11.0, *) {
            webView.scrollView.contentInsetAdjustmentBehavior = .never;
        }

    }

    override func loadView() {

        let webConfiguration = WKWebViewConfiguration()
        webConfiguration.dataDetectorTypes = [.all]
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view = webView

    }

}

编辑：

老兄，这是我的工作代码：

//
//  ViewController.swift
//  panel
//
//  Created by kevin on 25/07/2019.
//  Copyright © 2019 umono. All rights reserved.
//

import UIKit
import WebKit

class ViewController: UIViewController, WKUIDelegate {

    var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let myURL = URL(string:"https://someUrlToMyApp.appspot.com")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)

        if #available(iOS 11.0, *) {
            webView.scrollView.contentInsetAdjustmentBehavior = .never;
        }

        webView.navigationDelegate = self

    }

    override func loadView() {

        let webConfiguration = WKWebViewConfiguration()
        webConfiguration.dataDetectorTypes = [.all]
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view = webView

    }

}

extension ViewController: WKNavigationDelegate {
    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction,
                 decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        guard
            let url = navigationAction.request.url else {
                decisionHandler(.cancel)
                return
        }

        let string = url.absoluteString
        if (string.contains("mailto:")) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
            decisionHandler(.cancel)

            return
        }
        decisionHandler(.allow)
    }
}

Answer 1

一种执行所需操作的方法是实现WKNavigationDelegate：

import UIKit
import WebKit

class ViewController: UIViewController {

    @IBOutlet weak var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()

        guard
            let file = Bundle.main.path(forResource: "test", ofType: "html"),
            let html = try? String(contentsOfFile: file) else {
                return
        }

        webView.navigationDelegate = self
        webView.loadHTMLString(html, baseURL: nil)
    }

    @IBAction func didTapButton(_ sender: Any) {
        let email = "email@email.com"
        guard
            let url = URL(string: "mailto:\(email)") else {
                return
        }

        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    }
}

extension ViewController: WKNavigationDelegate {
    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction,
                 decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        guard
            let url = navigationAction.request.url,
            let scheme = url.scheme else {
                decisionHandler(.cancel)
                return
        }

        if (scheme.lowercased() == "mailto") {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
            // here I decide to .cancel, do as you wish
            decisionHandler(.cancel)
            return
        }
        decisionHandler(.allow)
    }
}

在这里，您有一个以webView作为出口的ViewController，此WKWebView将加载这样的html文件：

<a href="mailto:email@email.com">Mail me</a>

我还在情节提要中添加了一个仅供参考的按钮，该按钮具有上述IBAction didTapButton。

这里的关键是：

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction,
                 decisionHandler: @escaping (WKNavigationActionPolicy) -> Void)

哪个可以给您URL并让您确定适合它的策略。在这里，我检查它是否包含mailto:，因为我已经知道这是您感兴趣的内容，因此，如果打开，我只是像用户按下屏幕上可见的UIButton一样打开URL

希望它会有所帮助，加油！

LE：请确保您在真实设备上运行（模拟器未安装Mail应用程序），还请确保已安装Mail应用程序，因为我没有安装。.

WKWebView：html内容中的mailto链接未打开邮件应用

1 个答案: