Javascript：將函數作為參數添加到預定義的回調函數中

Question

我有此代碼使用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 } } 

現在sensors.getState有一個參數，並由plugin預定義。 我想執行作為添加參數傳遞的函數，例如：sensor.getState（app.callback（firstFunction））或當我需要sensor.getState（app.callback（secondFunction））時

謝謝。 銦D

Answer 1

嘗試這個

    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();