在iPhone和Android上通过JavaScript检测手指滑动

如何检测用户使用JavaScript在网页上向某个方向滑动手指？

我想知道是否有一个解决方案适用于iPhone和Android手机上的网站.

1> givanse..：

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简单的vanilla JS代码示例:

document.addEventListener('touchstart', handleTouchStart, false);        
document.addEventListener('touchmove', handleTouchMove, false);

var xDown = null;                                                        
var yDown = null;

function getTouches(evt) {
  return evt.touches ||             // browser API
         evt.originalEvent.touches; // jQuery
}                                                     

function handleTouchStart(evt) {
    const firstTouch = getTouches(evt)[0];                                      
    xDown = firstTouch.clientX;                                      
    yDown = firstTouch.clientY;                                      
};                                                

function handleTouchMove(evt) {
    if ( ! xDown || ! yDown ) {
        return;
    }

    var xUp = evt.touches[0].clientX;                                    
    var yUp = evt.touches[0].clientY;

    var xDiff = xDown - xUp;
    var yDiff = yDown - yUp;

    if ( Math.abs( xDiff ) > Math.abs( yDiff ) ) {/*most significant*/
        if ( xDiff > 0 ) {
            /* left swipe */ 
        } else {
            /* right swipe */
        }                       
    } else {
        if ( yDiff > 0 ) {
            /* up swipe */ 
        } else { 
            /* down swipe */
        }                                                                 
    }
    /* reset values */
    xDown = null;
    yDown = null;                                             
};

在Android中测试过.

---

这很好用,但左/右和上/下都是向后的.

---

originalEvent是一个JQuery属性.如果你在没有JQuery的情况下运行纯javascript,应该省略它.如果没有JQuery运行,当前代码会引发异常.

2> 小智..：

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我发现这个jquery touchwipe插件适用于我的第一代ipod touch和我的droid令人难以置信. http://www.netcu.de/jquery-touchwipe-iphone-ipad-library

---

工作得很好,简单,谢谢.我已经对它进行了现代化并使其使用jQuery事件:https://github.com/marcandre/detect_swipe

3> Marwelln..：

---

基于@ givanse的答案,您可以通过以下方式实现这一目标classes:

class Swipe {
    constructor(element) {
        this.xDown = null;
        this.yDown = null;
        this.element = typeof(element) === 'string' ? document.querySelector(element) : element;

        this.element.addEventListener('touchstart', function(evt) {
            this.xDown = evt.touches[0].clientX;
            this.yDown = evt.touches[0].clientY;
        }.bind(this), false);

    }

    onLeft(callback) {
        this.onLeft = callback;

        return this;
    }

    onRight(callback) {
        this.onRight = callback;

        return this;
    }

    onUp(callback) {
        this.onUp = callback;

        return this;
    }

    onDown(callback) {
        this.onDown = callback;

        return this;
    }

    handleTouchMove(evt) {
        if ( ! this.xDown || ! this.yDown ) {
            return;
        }

        var xUp = evt.touches[0].clientX;
        var yUp = evt.touches[0].clientY;

        this.xDiff = this.xDown - xUp;
        this.yDiff = this.yDown - yUp;

        if ( Math.abs( this.xDiff ) > Math.abs( this.yDiff ) ) { // Most significant.
            if ( this.xDiff > 0 ) {
                this.onLeft();
            } else {
                this.onRight();
            }
        } else {
            if ( this.yDiff > 0 ) {
                this.onUp();
            } else {
                this.onDown();
            }
        }

        // Reset values.
        this.xDown = null;
        this.yDown = null;
    }

    run() {
        this.element.addEventListener('touchmove', function(evt) {
            this.handleTouchMove(evt).bind(this);
        }.bind(this), false);
    }
}

你可以像这样使用它:

// Use class to get element by string.
var swiper = new Swipe('#my-element');
swiper.onLeft(function() { alert('You swiped left.') });
swiper.run();

// Get the element yourself.
var swiper = new Swipe(document.getElementById('#my-element'));
swiper.onLeft(function() { alert('You swiped left.') });
swiper.run();

// One-liner.
(new Swipe('#my-element')).onLeft(function() { alert('You swiped left.') }).run();

---

这段代码可能不会工作,因为你在尝试调用未定义的`.bind`时会遇到异常,因为你的`handleTouchMove`实际上没有返回任何东西.使用`this`调用函数时调用bind也没用,因为它已经绑定到当前上下文

---

我刚刚删除了.bind（this）;，它正常运行。谢谢@nicholas_r

---

如果您想等到滑动ENDS（意思是在他们举起手指或鼠标悬停后），请将“ touches [0]”更改为“ changedTouches [0]”，并将事件处理程序将“ handleTouchMove”更改为“ handleTouchEnd”。

4> 小智..：

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你试过hammer.js吗？http://eightmedia.github.com/hammer.js/ 也适用于Windows手机..

5> helloandre..：

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之前我用过的是你必须检测mousedown事件,记录它的x,y位置(以相关者为准)然后检测mouseup事件,然后减去这两个值.

---

我相信它是touchstart,touchmove,touchcancel和touchend,可以使用,而不是mousedown或mouseup.

6> Grinn..：

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jQuery Mobile还包括滑动支持:http://api.jquerymobile.com/swipe/

例

$("#divId").on("swipe", function(event) {
    alert("It's a swipe!");
});

---

如果不希望jQuery mobile操作UI,请参阅:http://stackoverflow.com/questions/8648596/how-to-use-jquery-mobile-for-its-touch-event-support-only-no- UI的改进#答案 - 12631480

7> John Doherty..：

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我将这里的一些答案合并到一个脚本中,该脚本使用CustomEvent来触发DOM中的滑动事件.将0.7k pure-swipe.min.js脚本添加到您的页面并侦听滑动事件:

刷卡左

document.addEventListener('swiped-left', function(e) {
    console.log(e.target); // the element that was swiped
});

刷卡右

document.addEventListener('swiped-right', function(e) {
    console.log(e.target); // the element that was swiped
});

刷卡机

document.addEventListener('swiped-up', function(e) {
    console.log(e.target); // the element that was swiped
});

刷卡降

document.addEventListener('swiped-down', function(e) {
    console.log(e.target); // the element that was swiped
});

您还可以直接附加到元素:

document.getElementById('myBox').addEventListener('swiped-down', function(e) {
    console.log(e.target); // the element that was swiped
});

可选配置

您可以指定以下属性来调整页面中滑动交互功能的方式(这些是可选的).

        Swiper, get swiping!

源代码可在Github上找到

8> nashcheez..：

---

我发现@givanse很棒的答案是在多个移动浏览器中最可靠和最兼容的注册滑动操作.

但是,他的代码需要更改才能使其在现代移动浏览器中使用jQuery.

event.touches如果jQuery使用并且导致undefined并且应该替换为将不存在event.originalEvent.touches.没有jQuery,event.touches应该工作正常.

所以解决方案变成,

document.addEventListener('touchstart', handleTouchStart, false);        
document.addEventListener('touchmove', handleTouchMove, false);

var xDown = null;                                                        
var yDown = null;                                                        

function handleTouchStart(evt) {                                         
    xDown = evt.originalEvent.touches[0].clientX;                                      
    yDown = evt.originalEvent.touches[0].clientY;                                      
};                                                

function handleTouchMove(evt) {
    if ( ! xDown || ! yDown ) {
        return;
    }

    var xUp = evt.originalEvent.touches[0].clientX;                                    
    var yUp = evt.originalEvent.touches[0].clientY;

    var xDiff = xDown - xUp;
    var yDiff = yDown - yUp;

    if ( Math.abs( xDiff ) > Math.abs( yDiff ) ) {/*most significant*/
        if ( xDiff > 0 ) {
            /* left swipe */ 
        } else {
            /* right swipe */
        }                       
    } else {
        if ( yDiff > 0 ) {
            /* up swipe */ 
        } else { 
            /* down swipe */
        }                                                                 
    }
    /* reset values */
    xDown = null;
    yDown = null;                                             
};

测试:

Android:Chrome,UC浏览器

iOS:Safari,Chrome,UC浏览器

9> Marc-André L..：

---

我重新打包TouchWipe为一个简短的jquery插件:detectSwipe

10> 小智..：

---

一些最新的答案(无法评论......)来处理短暂的滑动

document.addEventListener('touchstart', handleTouchStart, false);        
document.addEventListener('touchmove', handleTouchMove, false);
var xDown = null;                                                        
var yDown = null;                                                        
function handleTouchStart(evt) {                                         
    xDown = evt.touches[0].clientX;                                      
    yDown = evt.touches[0].clientY;                                      
};                                                
function handleTouchMove(evt) {
    if ( ! xDown || ! yDown ) {
        return;
    }

    var xUp = evt.touches[0].clientX;                                    
    var yUp = evt.touches[0].clientY;

    var xDiff = xDown - xUp;
    var yDiff = yDown - yUp;
    if(Math.abs( xDiff )+Math.abs( yDiff )>150){ //to deal with to short swipes

    if ( Math.abs( xDiff ) > Math.abs( yDiff ) ) {/*most significant*/
        if ( xDiff > 0 ) {/* left swipe */ 
            alert('left!');
        } else {/* right swipe */
            alert('right!');
        }                       
    } else {
        if ( yDiff > 0 ) {/* up swipe */
            alert('Up!'); 
        } else { /* down swipe */
            alert('Down!');
        }                                                                 
    }
    /* reset values */
    xDown = null;
    yDown = null;
    }
};

11> Sergey Guns..：

---

trashold,超时滑动,swipeBlockElems添加.

document.addEventListener('touchstart', handleTouchStart, false);
document.addEventListener('touchmove', handleTouchMove, false);
document.addEventListener('touchend', handleTouchEnd, false);     

const SWIPE_BLOCK_ELEMS = [
  'swipBlock',
  'handle',
  'drag-ruble'
]

let xDown = null;
let yDown = null; 
let xDiff = null;
let yDiff = null;
let timeDown = null;
const  TIME_TRASHOLD = 200;
const  DIFF_TRASHOLD = 130;

function handleTouchEnd() {

let timeDiff = Date.now() - timeDown; 
if (Math.abs(xDiff) > Math.abs(yDiff)) { /*most significant*/
  if (Math.abs(xDiff) > DIFF_TRASHOLD && timeDiff < TIME_TRASHOLD) {
    if (xDiff > 0) {
      // console.log(xDiff, TIME_TRASHOLD, DIFF_TRASHOLD)
      SWIPE_LEFT(LEFT) /* left swipe */
    } else {
      // console.log(xDiff)
      SWIPE_RIGHT(RIGHT) /* right swipe */
    }
  } else {
    console.log('swipeX trashhold')
  }
} else {
  if (Math.abs(yDiff) > DIFF_TRASHOLD && timeDiff < TIME_TRASHOLD) {
    if (yDiff > 0) {
      /* up swipe */
    } else {
      /* down swipe */
    }
  } else {
    console.log('swipeY trashhold')
  }
 }
 /* reset values */
 xDown = null;
 yDown = null;
 timeDown = null; 
}
function containsClassName (evntarget , classArr) {
 for (var i = classArr.length - 1; i >= 0; i--) {
   if( evntarget.classList.contains(classArr[i]) ) {
      return true;
    }
  }
}
function handleTouchStart(evt) {
  let touchStartTarget = evt.target;
  if( containsClassName(touchStartTarget, SWIPE_BLOCK_ELEMS) ) {
    return;
  }
  timeDown = Date.now()
  xDown = evt.touches[0].clientX;
  yDown = evt.touches[0].clientY;
  xDiff = 0;
  yDiff = 0;

}

function handleTouchMove(evt) {
  if (!xDown || !yDown) {
    return;
  }

  var xUp = evt.touches[0].clientX;
  var yUp = evt.touches[0].clientY;


  xDiff = xDown - xUp;
  yDiff = yDown - yUp;
}