Swift webview: 如何调用代码 swift 的 javascript?
我正在努力制造我的 javascript 与代码互动 swift, 但是，不幸的是，我不能。
目前我刚刚尝试更改标题的颜色并显示一条消息，如下代码所示。
这是我的代码 /
index.html
/ :
这是我的代码 /
main.js -JavaScript
/ :
这是我的代码 /
ViewController.swift
/ :
目前我刚刚尝试更改标题的颜色并显示一条消息，如下代码所示。
这是我的代码 /
index.html
/ :
html
<html>
<head>
<title>Test</title>
<meta charset="utf-8"/>
</head>
<body>
<h1>WebView Test</h1>
<script src="main.js" type="text/javascript"></script>
</body>
</html>
这是我的代码 /
main.js -JavaScript
/ :
function callNativeApp // {
try {
webkit.messageHandlers.callbackHandler.postMessage/"Send from JavaScript"/;
} catch/err/ {
console.log/'error'/;
}
}
setTimeout/function // {
callNativeApp//;
}, 5000/;
function redHeader// {
document.querySelector/'h1'/.style.color = "red";
}这是我的代码 /
ViewController.swift
/ :
import UIKit
import WebKit
class ViewController: UIViewController, WKScriptMessageHandler {
@IBOutlet var containerView : UIView! = nil
var webView: WKWebView?
override func loadView// {
super.loadView//
var contentController = WKUserContentController//;
var userScript = WKUserScript/
source: "redHeader//",
injectionTime: WKUserScriptInjectionTime.AtDocumentEnd,
forMainFrameOnly: true
/
contentController.addUserScript/userScript/
contentController.addScriptMessageHandler/
self,
name: "callbackHandler"
/
var config = WKWebViewConfiguration//
config.userContentController = contentController
self.webView = WKWebView//
self.view = self.webView!
}
override func viewDidLoad// {
super.viewDidLoad//
// Do any additional setup after loading the view, typically from a nib.
var url = NSURL/fileURLWithPath: NSBundle.mainBundle//.pathForResource/"index", ofType: "html"/!/
var req = NSURLRequest/URL: url/
self.webView!.loadRequest/req/
}
func userContentController/userContentController: WKUserContentController!,didReceiveScriptMessage message: WKScriptMessage!/ {
if/message.name == "callbackHandler"/ {
println/"JavaScript is sending a message \/message.body/"/
} }
override func didReceiveMemoryWarning// {
super.didReceiveMemoryWarning//
// Dispose of any resources that can be recreated.
}
}
没有找到相关结果
已邀请:
2 个回复
知食
赞同来自:
在
. 由于配置具有桥接详细信息 Javascript/Swift, 你不能来回说话。
override func loadView// {
// ...
var config = WKWebViewConfiguration//
config.userContentController = contentController
self.webView = WKWebView/frame: self.view.frame, configuration: config/
self.view = self.webView!
}
莫问
赞同来自:
然后
override func loadView// {
let theConfiguration = WKWebViewConfiguration//
let contentController = theConfiguration.userContentController
// alert fix, at start to allow a JS script to overwrite it
contentController.addUserScript/ WKUserScript/
source: "window.alert = function/message/{window.webkit.messageHandlers.messageBox.postMessage/{message:message}/;};",
injectionTime: WKUserScriptInjectionTime.AtDocumentStart,
forMainFrameOnly: true
/ /
contentController.addScriptMessageHandler/self, name: "messageBox"/
self.webView = WKWebView/frame: self.view.frame, configuration: theConfiguration/
// and here things like: self.webView!.navigationDelegate = self
self.view = self.webView! // fill controllers view
}
具体而言
func userContentController/userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage/ {
if message.name == "messageBox" {
let sentData = message.body as! Dictionary<string, string="">
let message:String? = sentData["message"]
let alertController = UIAlertController/title: nil, message: message, preferredStyle: UIAlertControllerStyle.Alert/
alertController.addAction/UIAlertAction/title: NSLocalizedString/"OK", comment:"btnOK"/, style: .Default, handler: nil//
self.presentViewController/alertController, animated: true/ {}
}
}
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