Javascript：将函数作为参数添加到预定义的回调函数中

Question

我有此代码使用cordov / phonegap插件：

 var app = { init: function (){ sensors.getState(app.callback); }, callback: function(state){ //parameter of this callback function is define by cordova plugin if (state[0] == 0) { //execute another function passed as argument because I wwant to change it in other parts of my code } }, firstFunction(){ //execute action 1 }, secondFunction(){ //execute action 2 } } 

现在sensors.getState有一个参数，并由plugin预定义。 我想执行作为添加参数传递的函数，例如：sensor.getState（app.callback（firstFunction））或当我需要sensor.getState（app.callback（secondFunction））时

谢谢。 铟D

Answer 1

尝试这个

    var app = {
    init: function() {
        sensors.getState(app.callback);
    },
    test: function() {},
    setCallback: function(callback) {
        app.test = callback;
    },
    callback: function(state) {
        app.test();
    },
    firstFunction() {
        alert("firstFunction");
    },
    secondFunction() {
        alert("secondFunction");
    }
};
app.setCallback(app.firstFunction);
app.callback();
app.setCallback(function () { alert("thirdFunction"); });
app.callback();