swift 笔记：iOS与JavaScript的交互（一）：UIWebView - 2.1本地对JavaScript的基本调用和获取返回值

Posted 2021-05-19

// 直接 alert
function sayHello () {
  alert('hello')；
}

// alert with parameter
function sayHelloTo(name) {
  alert(`Hello ${name}`)；
}

// alert with parameter & return value
function sayHelloWithRtnValue (name) {
  return `hello ${name}`；
}

let fun1String = "sayHello()"
webview.stringByEvaluatingJavaScript(from: fun1String)

let fun2String = "sayHelloTo('lien')"
webview.stringByEvaluatingJavaScript(from: fun2String)

let fun3Stirng = "sayHelloWithRtnValue('lien')"
let rtnValue = webView.stringByEvaluatingJavaScript(from: fun3Stirng)
print("returned value from JavaScript: \(rtnValue)")