将变量从Swift传递到javascript函数

本文介绍了将变量从Swift传递到javascript函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

使用JSContext将变量传递给javascript函数时遇到麻烦.错误显示stringToSend未定义:

Having trouble using JSContext to pass a variable to a javascript function. The error says stringToSend is undefined:

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

推荐答案

这是我喜欢从Swift到Java进行通信的方式:

Here is how I like to communicate from Swift to Javascript:

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)") }) }

在调用此方法时，请确保在您的JavaScript上下文中实现了 myJSFunction .

Make sure myJSFunction is implemented in your javascript context when you call this method.

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

Your stringToSend String will automatically be mapped to a javascript string when using callWithArguments.