对对象数组只迭代一次

Question

$(document).ready(function() {

allQuestions是对象数组，它的作用是为我的应用程序提供问题(question)，答案(choices)和正确的响应(correctAnswer)。

        var allQuestions = [{question: "If you were a super hero what powers would you have?",
            choices: ["a", "b", "c", "d"],
            correctAnswer:0},
            {question: "Do you have a cherished childhood teddybear?",
                choices: ["e", "f", "g", "j"],
                correctAnswer:0},
            {question: "Whats your favourite non-alcoholic drink?",
                choices: ["i", "j", "k", "l"],
                correctAnswer:0},
            {question: "Are you religious?",
                choices: ["m", "n", "o", "p"],
                correctAnswer:0}];

接下来，一旦我的按钮，与#next id被点击，段落id #question 应该改变他的文本与下一个问题从allQuestions数组。

实际结果?当我单击next按钮时，该函数遍历所有问题，并且只显示最后一个问题。

我试图使用stackoverflow的解决方案，设置var hasLooped但不起作用。

        $('#next').click(function(){
            //var hasLooped = false;
            $.each(allQuestions, function(key){
               // if(!hasLooped) {
                    $('#question').text(allQuestions[key].question);
               // }
               // hasLooped = true;
            })
        })
    });

Answer 1

将问题的索引保存在一个变量中，并在点击#next时增加该索引

写这个:

$(function () {
    var count = 0,
        len = allQuestions.length;
    $('#next').click(function () {
        if (count < len - 1) {
            count++;
            $('#question').text(allQuestions[count].question);
        } else {
            $(this).remove();
    });
});

fiddle

Answer 2

您需要将当前问题存储在外部某个地方并引用它，而不是传递给每个函数的键，因为它将始终循环遍历所有，您将看到最后一个。

var intNum = 1;
$('#next').click(function(){
    $('#question').text(allQuestions[intNum].question);
    intNum++;
});

Answer 3

var clickCount = 0;
$('#next').click(function(){        
  $('#question').text(allQuestions[clickCount].question);       
  clickCount=(clickCount+1>9)?0:clickCount+1;
});

Answer 4

如果你不喜欢全局变量，你可以试试这个:

$('#next').click(function(){
    var counter = parseInt($("#next").attr("counter"));
    if (counter>=allQuestions.length){
        alert("No more questions!");
        return;
    }
    $('#question').text(allQuestions[counter].question);
    $("#next").attr("counter",counter+1);
});

DEMO