使用 UIWebview 使用 javascript 调用 swift 函数

问题描述

如果有人问过这个问题，我深表歉意，但我找不到任何答案或解决方案.我希望从UIWebView"调用一个 JavaScript 函数并迅速收听它.我发现的任何示例都使用WKWebView".必须有一种简单的方法来监听 JavaScript 函数，如下所示:

I apologize if this has been asked but I was unable to find any answer or solution. I am looking to call a JavaScript function from a "UIWebView" and listen for it in swift. Any example I have found uses "WKWebView". There has to be an easy way to listen to a JavaScript function like the below:

// HTML / JS
<div id ="myDiv" onclick="listenInSwift()">myItem</div>

这可以通过 UIWebView 实现吗?谢谢大家！

Is this possible with a UIWebView? Thanks all!

推荐答案

像这样实现 listenInSwift:

function listenInSwift() {
    window.location = 'yoururlscheme://somehost?greeting=hello'
} 

然后在您的 UIWebViewDelegate 类中使用此代码侦听此 URL:

Then listen for this URL with this code in your UIWebViewDelegate class:

func webView(_ webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType navigationType: UIWebViewNavigationType) -> Bool {
    if request.URL.scheme == 'yoururlscheme' {
        print('Hello JavaScript...')
    }
}

不要忘记在 Xcode 中注册您的 URL Scheme(在本例中为yoururlscheme").

Don't forget to register your URL Scheme (in this case 'yoururlscheme') in Xcode.

要在 web 视图中加载本地文件，试试这个:

To load a local file in the web view, try this:

let baseURL = NSURL.fileURLWithPath(NSBundle.mainBundle().bundlePath);
let relativePath = "www/(file)"
let fileURL = NSURL(string: relativePath, relativeToURL: baseURL);
let URLRequest = NSURLRequest(URL: fileURL!);
webView.loadRequest(URLRequest)

这篇关于使用 UIWebview 使用 javascript 调用 swift 函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！