jQuery无法在iPad上运行

Question

我有一个相当恼人的问题。我正在举行一场比赛，比分保持不变。有5个问题。它包含一个带单选按钮的表单。 jQuery检查选择了哪个单选按钮，并在每次给出正确答案时对变量进行计数。编写了以下jQuery代码：

var i = 0;
var correctQuestions = 0;

function readValue(){

        var antwoordVraag1 = $('input[name=q1]:checked', '#comp').val();
        var antwoordVraag2 = $('input[name=q2]:checked', '#comp').val();
        var antwoordVraag3 = $('input[name=q3]:checked', '#comp').val();
        var antwoordVraag4 = $('input[name=q4]:checked', '#comp').val();
        var antwoordVraag5 = $('input[name=q5]:checked', '#comp').val();

        if (i === 0){
            $('.question-wrapper-1').fadeOut("slow", function(){
                $('.question-wrapper-2').fadeIn("slow");
            });
            i++;
            $('.progress-radio-btn-1').attr('src','common/img/question-btn.png');
            $('.progress-radio-btn-2').attr('src','common/img/question-btn-active.png');
            if(antwoordVraag1 == 1){
                correctQuestions++;
            }
            console.log('Vragen goed = '+correctQuestions);
        }

        else if (i === 1){
            $('.question-wrapper-2').fadeOut("slow", function(){
                $('.question-wrapper-3').fadeIn("slow");
            });
            i++;
            $('.progress-radio-btn-2').attr('src','common/img/question-btn.png');
            $('.progress-radio-btn-3').attr('src','common/img/question-btn-active.png');
            if(antwoordVraag2 == 1){
                correctQuestions++;
            }
            console.log('Vragen goed = '+correctQuestions);
        }

        else if (i === 2){
            $('.question-wrapper-3').fadeOut("slow", function(){
                $('.question-wrapper-4').fadeIn("slow");
            });
            i++;
            $('.progress-radio-btn-3').attr('src','common/img/question-btn.png');
            $('.progress-radio-btn-4').attr('src','common/img/question-btn-active.png');
            if(antwoordVraag3 == 2){
                correctQuestions++;
            }
            console.log('Vragen goed = '+correctQuestions);
        }

        else if (i === 3){
            $('.question-wrapper-4').fadeOut("slow", function(){
                $('.question-wrapper-5').fadeIn("slow");
            });
            i++;
            $('.progress-radio-btn-4').attr('src','common/img/question-btn.png');
            $('.progress-radio-btn-5').attr('src','common/img/question-btn-active.png');
            if(antwoordVraag4 == 3){
                correctQuestions++;
            }
            console.log('Vragen goed = '+correctQuestions);
        }

        else if (i === 4){
            $('#question-btn').fadeOut(),500;
            $('.progress-radio').fadeOut(),500;
            $('.question-wrapper-5').fadeOut("slow", function(){
                $('.final-wrapper').fadeIn("slow");
            });
            if(antwoordVraag5 == 3){
                correctQuestions++;
            }
            console.log('Vragen goed = '+correctQuestions);
        }

        else{
            alert('Something went wrong...');
            alert(i);
        }

}

这在桌面上运行得很好。但是，当我在iPad上测试它时，警报框会给出一个＆＃34; i＆＃34;价值86.我不知道如何解决这个问题。

谢谢！