Question

使用hammer.js默认'doubletap'

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <title>Document</title>
        <style media="screen">
            .box {
                width: 400px;
                height: 400px;
                background-color: green;
            }
        </style>
    </head>
    <body>
        <div class="box">

        </div>
        <script src="js/hammer.js" charset="utf-8"></script>
        <script type="text/javascript">
        document.addEventListener("DOMContentLoaded", function () {
            var myElement = document.querySelector('.box')

            var hammer = new Hammer(myElement)

            hammer.on('doubletap', function (e) {
                console.log(e.type)
            }).on('tap', function (e) {
                console.log(e.type)
            })
        })
        </script>
    </body>
    </html>

当我双击时，它会打印'轻击'两次，然后'双击'一次，但我希望它只是打印'doubletap'，不要点击'tap'。

我尝试了requreFailure http://hammerjs.github.io/require-failure/和Hammer.js : How to handle / set tap and doubletap on same elements

所以我写这个：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <title>Document</title>
    <style media="screen">
        .box {
            width: 400px;
            height: 400px;
            background-color: green;
        }
    </style>
</head>
<body>
    <div class="box">

    </div>
    <script src="js/hammer.js" charset="utf-8"></script>
    <script type="text/javascript">
    document.addEventListener("DOMContentLoaded", function () {
        var myElement = document.querySelector('.box')

        var hammer = new Hammer(myElement)
        var singleTap = new Hammer.Tap({ event: 'singletap' });
        var doubleTap = new Hammer.Tap({event: 'doubletap', taps: 2 });

        hammer.add([doubleTap, singleTap]);

        doubleTap.recognizeWith(singleTap);

        singleTap.requireFailure([doubleTap]);
        hammer.on('doubletap', function (e) {
            console.log(e.type)
        }).on('singletap', function (e) {
            console.log(e.type)
        })
    })
    </script>
</body>
</html>

但它没有console.log任何东西（甚至是错误信息），这真的很奇怪。锤子的版本是2.0.8。抱歉我的英语不好，希望很清楚。

Answer 1

尝试使用

var hammer = new Hammer.Manager(myElement);

而不是

hammer = new Hammer(myElement).

侨

Answer 2

尝试此代码：

var timeInMs = 0;
hammer.on('tap', function(e) {
    if((Date.now()-timeInMs)<300){
        //doubleTap
    }else{
        //tap
    }
    timeInMs = Date.now();
});

hammer.js无法处理/设置相同元素上的tap和doubletap

2 个答案: