下面的代码能够获取地理位置并将其打印出来。我是根据一些在线教程并查看Swift文档而得到的。我想将字符串形式的地理位置从Swift 2传递给Javascript。我能够获取GeoLocations,但我不知道如何将这些字符串传递给Webview中的Javascript代码。
以下是我拥有的代码:
@IBOutlet weak var Webview: UIWebView!
let locMgr = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
loadAddressURL()
locMgr.desiredAccuracy = kCLLocationAccuracyBest
locMgr.requestWhenInUseAuthorization()
locMgr.startUpdatingLocation()
locMgr.delegate = self //necessary
}
func locationManager(manager: CLLocationManager , didUpdateLocations locations: [CLLocation]){
let myCurrentLoc = locations[locations.count-1]
var myCurrentLocLat:String = "\(myCurrentLoc.coordinate.latitude)"
var myCurrentLocLon:String = "\(myCurrentLoc.coordinate.longitude)"
print(myCurrentLocLat)
print(myCurrentLocLon)
//pass to javascript here by calling setIOSNativeAppLocation
}
我的网站上有使用这种方法的javascript:
function setIOSNativeAppLocation(lat , lon){
nativeAppLat = lat;
nativeAppLon = lon;
alert(nativeAppLat);
alert(nativeAppLon);
}
我用以下解决方案查看了另一个问题,该问题标记为从Swift到Java传递变量:
func sendSomething(stringToSend : String) {
appController?.evaluateInJavaScriptContext({ (context) -> Void in
//Get a reference to the "myJSFunction" method that you've implemented in JavaScript
let myJSFunction = evaluation.objectForKeyedSubscript("myJSFunction")
//Call your JavaScript method with an array of arguments
myJSFunction.callWithArguments([stringToSend])
}, completion: { (evaluated) -> Void in
print("we have completed: \(evaluated)")
})
}
但是,我没有appDelegate,我想直接从此视图进行这些更改。因此,我得到了“使用未解析的标识符appDelegate”。
您必须实现UIWebview委托。应该在webviewDidFinishLoad之后调用Javascript函数。
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let url = NSURL (string: URLSTRING);
let requestObj = NSURLRequest(URL: url!);
webView.delegate = self
webView.loadRequest(requestObj);
}
func webViewDidFinishLoad(webView: UIWebView) {
let javaScriptStr = "setIOSNativeAppLocation(\(myCurrentLoc.coordinate.latitude), \(myCurrentLoc.coordinate.longitude))"
webView.stringByEvaluatingJavaScriptFromString(javaScriptStr)
}
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