将变量从 Swift 传递到 javascript 函数

Pass variable from Swift to javascript function

使用 JSContext 将变量传递给 javascript 函数时遇到问题。错误说 stringToSend 未定义:

func sendSomething(stringToSend : String) {
        appController?.evaluateInJavaScriptContext({ (context) -> Void in
            context.evaluateScript("myJSFunction(stringToSend)")
            }, completion: { (evaluated) -> Void in
                print("we have completed: \(evaluated)")
        })
    }

所需的字符串 Swift 的 String Interpolation,加上额外的引号,如下所示:

func sendSomething(stringToSend : String) {
        appController?.evaluateInJavaScriptContext({ (context) -> Void in
            context.evaluateScript("myJSFunction('\(stringToSend)')")
            }, completion: { (evaluated) -> Void in
                print("we have completed: \(evaluated)")
        })
    }

这是我喜欢从 Swift 到 Javascript 的交流方式:

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)")
    })
}

确保 myJSFunction 在您调用此方法时在您的 javascript 上下文中实现。

当使用 callWithArguments.

时,您的 stringToSend 字符串将自动映射到 javascript 字符串