调用javascript函数并传递回调函数

Question

I want to call a javascript function in Action script, something like this:

ExternalInterface.call('a_js_function', param1, another_js_function);

I want the javascript function a_js_function takes in two params, one is a string, another one is a callback function. So I can call the js function like this:

function a_js_function(testStr, callback) {
    console.log(testStr);
    callback(testStr);
}

function another_js_function(str) {
    console.log(str);
}

What is the correct way to do this?

Problem solved, it turns out the second I passed in is a string, in javascript I have to turn string into function in order to call it.

Answer 1

call like this

try {
       ExternalInterface.call('a_js_function', param1, another_js_function);
        } catch(e:Error) {
        trace(e)
        }

and for more information see this

Answer 2

Since flash does not have any reference to the javascript function another_js_function you need to pass the function name as a string then access it using brackets on whichever namespace. I used global variables for simplicity but it can be any object/namespace

another_js_function = function(testStr) {
    alert(testStr);
}

a_js_function = function(testStr, callback) {
    console.log( this.window );
    window[callback].call(this, testStr); // pass scope?
    // OR
    window[callback](testStr);
}
// Simulating call from Flash
a_js_function("howdy y'all", "another_js_function");

In Action: http://jsfiddle.net/3n1gm4/Np3bW/