在Swift中的UIWebView中执行JavaScript

Question

I am trying to execute the Amazon Mobile Add in my iOS application using Swift 3.0. 我正在尝试使用Swift 3.0在我的iOS应用程序中执行Amazon Mobile Add。 The file loads successfully. 文件加载成功。 I can run the google URL (code commented below) in the webView. 我可以在webView中运行google URL（下面注释的代码）。 I don't understand how to execute the javaScript. 我不明白如何执行javaScript。 I have been reading tutorials, but nothing seems to run the script as-is natively in the webView. 我一直在阅读教程，但似乎没有任何内容可以在webView中原生运行脚本。 I tried the webView.stringByEvaluatingJavaScript and the context.evaluateScript, but all I get is "Amazon Ad" and not the script output in the webView. 我尝试了webView.stringByEvaluatingJavaScript和context.evaluateScript，但我得到的只是“ Amazon Ad”，而不是webView中的脚本输出。

My question is, how do I run javaScript in the simplest way in a webView - or any other view for that matter. 我的问题是，如何在webView或任何其他视图中以最简单的方式运行javaScript。 xxxxx are "redacted" user keys. xxxxx是“已编辑的”用户密钥。

<!DOCTYPE html>
<html>
<body>

<h1>Amazon Ad</h1>

<script type="text/javascript">
amzn_assoc_placement = "xxxxxx";
amzn_assoc_search_bar = "true";
amzn_assoc_tracking_id = "xxxxxx";
amzn_assoc_search_bar_position = "bottom";
amzn_assoc_ad_mode = "search";
amzn_assoc_ad_type = "smart";
amzn_assoc_marketplace = "amazon";
amzn_assoc_region = "US";
amzn_assoc_title = "Star Wars Black Series 6\"";
amzn_assoc_default_search_phrase = "Star Wars Black Series 6 Inch";
amzn_assoc_default_category = "All";
amzn_assoc_linkid = "xxxxxxx";
</script>
<script src="//z-na.amazon-adsystem.com/widgets/onejs?MarketPlace=US"></script>

</body>
</html>

Here is the UIViewController with UIWebView. 这是带有UIWebView的UIViewController。 I tried both of the following, 我尝试了以下两种方法

webView.stringByEvaluatingJavaScript(from: common), 
webView.loadHTMLString(common, baseURL: Bundle.main.bundleURL)

Code 码

import UIKit
import JavaScriptCore

class AmazonFullAdViewController: UIViewController, UIWebViewDelegate {

@IBOutlet weak var webView: UIWebView!

var url = URL(string: "https://google.com")

override func viewDidLoad() {
    super.viewDidLoad()

    webView.delegate = self

    // 1
    guard let commonJSPath = Bundle.main.path(forResource: "common", ofType: "js") else {
        //commonJSPath = Bundle.main.path(forResource: "Series", ofType: "txt") else {
            print("Unable to read resource files.")
            return
    }

    // 2
    do {
        let common = try String(contentsOfFile: commonJSPath, encoding: String.Encoding.utf8)
        _ = context?.evaluateScript(common)
        // webView.stringByEvaluatingJavaScript(from: common)
        webView.loadHTMLString(common, baseURL: Bundle.main.bundleURL)
    } catch (let error) {
        print("Error while processing script file: \(error)")
    }

    //load initial URL
//        let req = URLRequest(url : url!)
//        webView.scalesPageToFit = true
//        webView.contentMode = .scaleAspectFit
//        webView.loadRequest(req)
}
}

Answer 1

我认为您需要告诉webview它需要加载一个html值，因为您的文件是带有javascript的html。

self.webview.loadHTMLString(yourfile)

在Swift中的UIWebView中执行JavaScript

问题描述

1 个解决方案

解决方案1
0 2017-04-06 01:30:51

在Swift中的UIWebView中执行JavaScript

问题描述

1 个解决方案

解决方案1 0 2017-04-06 01:30:51

解决方案1
0 2017-04-06 01:30:51