Swift WKWebView:调用方法时找不到变量错误

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我正在尝试将 GPS 坐标传递给方法调用 setIOSNativeAppLocation.我在下面有以下代码，但出现此错误:

I am trying to pass GPS coordinates to a method call setIOSNativeAppLocation. I have the following code below but I am getting this error:

A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage= ReferenceError: Can't find variable: setIOSNativeAppLocation, WKJavaScriptExceptionSourceURL= mywebsite, NSLocalizedDescription= A JavaScript exception occurred, WKJavaScriptExceptionColumnNumber=24})

我不确定它是否与语法或其他任何事情有关.如果有人知道我做错了什么，我将不胜感激.

I am not sure if it has something to do with the syntax or anything else. If someone knows what I am doing wrong I would greatly appreciate it.

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { if(myCurrentLoc != nil){ let lat = myCurrentLoc.coordinate.latitude let lon = myCurrentLoc.coordinate.longitude print(lat); print(lon); webView.evaluateJavaScript("setIOSNativeAppLocation(\(lat), \(lon));") { (result, error) in guard error == nil else { print("there was an error") print(error) return } } } }

推荐答案

我认为这可以帮助你 - 我们在这里传递参数的方式.

I think this can help you out- The way we are passing parameter here.

我们应该把它放在单引号中('\(lat)', '\(lon)') 否则它就像一个变量.

we should put it in single quote('\(lat)', '\(lon)') else it will be like a variable.

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { if(myCurrentLoc != nil){ let lat = myCurrentLoc.coordinate.latitude let lon = myCurrentLoc.coordinate.longitude print(lat); print(lon); webView.evaluateJavaScript("setIOSNativeAppLocation('\(lat)', '\(lon)');") { (result, error) in guard error == nil else { print("there was an error") print(error) return } } } }