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下面代碼是想實(shí)現(xiàn)在微信中頁(yè)面滑動(dòng)到特定的范圍播放特定的音頻
目前遇到的問(wèn)題是頁(yè)面滑動(dòng)音頻不播放,但是只要先每個(gè)音頻點(diǎn)擊一下播放再暫停以后就可以滑動(dòng)播放了,請(qǐng)問(wèn)這是為什么呢?是哪塊代碼寫的不穩(wěn)妥嗎?

    <audio id="a1" src="http://mat1.gtimg.com/ln/images/mp3/11.mp3" loop controls  preload="load"></audio>
    <audio id="a2" src="http://mat1.gtimg.com/ln/images/mp3/22.mp3" loop controls  preload="load"></audio>

    <p class="wrap" id="wp">
        <p class="audio2"></p> <img src="http://img1.gtimg.com/ln/pics/hv1/133/63/2205/143396323.jpg" alt="" width="100%"> </p>
    <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
    <script>
        function autoPlayAudio1() {
            wx.config({
                // 配置信息, 即使不正確也能使用 wx.ready
                debug: false
                , appId: ''
                , timestamp: 1
                , nonceStr: ''
                , signature: ''
                , jsApiList: []
            });
            wx.ready(function () {
                var mp3 = document.getElementById('bgmusic')
                    , a1 = document.getElementById('a1')
                    , a2 = document.getElementById('a2');
                //a1.play();
                console.log('ok')
                $(window).scroll(function () {
                    var x = $('.audio2').offset().top - $(window).scrollTop();
                    console.log(x)
                    if (x < 4500 && x > 4000) {
                        a1.play();
                        a2.pause();
                    }
                    else if (x < 4000 && x > 3500) {
                        a2.play();
                        a1.pause();
                    }
                });
            });
        }
        autoPlayAudio1();
    </script>