如何强制在WebView中单击的任何链接在Safari中打开?

问题描述

我的应用程序中有一个WebView，我希望在WebView中单击的任何链接都可以在Safari中打开(而不是WebView本身).

I have a WebView in my application and I would like any links clicked within the WebView to open in Safari (instead of the WebView itself).

我正在用Swift开发应用程序.

I am developing the application in Swift.

执行此操作的最佳方法是什么?

What is the best method to do this?

推荐答案

在Swift中，这基本上与在Obj-C中相同:

This is done essentially the same way in Swift as in Obj-C:

首先，声明您的视图控制器符合UIWebViewDelegate

First, declare that your view controller conforms to UIWebViewDelegate

class MyViewController: UIWebViewDelegate

然后实施 webViewShouldStartLoadingWithRequest:navigationType: 在您的View Controller中:

Then implement webViewShouldStartLoadingWithRequest:navigationType: in your View Controller:

// Swift 1 & 2
func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
    switch navigationType {
    case .LinkClicked:
        // Open links in Safari
        UIApplication.sharedApplication().openURL(request.URL)
        return false
    default:
        // Handle other navigation types...
        return true
    }
}

// Swift 3
func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool {
    switch navigationType {
    case .linkClicked:
        // Open links in Safari
        guard let url = request.url else { return true }

        if #available(iOS 10.0, *) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        } else {
            // openURL(_:) is deprecated in iOS 10+.
            UIApplication.shared.openURL(url)
        }
        return false
    default:
        // Handle other navigation types...
        return true
    }
}

最后，例如在viewDidLoad或情节提要中设置UIWebView的委托:

Finally, set your UIWebView's delegate, e.g., in viewDidLoad or in your Storyboard:

webView.delegate = self

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