827*_*827 247 javascript iphone android swipe
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.
giv*_*nse 314
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.
Dai*_*Lak 43
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
Dam*_*ica 34
用于水平滑动的简单香草 JS 示例：
let touchstartX = 0
let touchendX = 0
const slider = document.getElementById('slider')
function handleGesture() {
if (touchendX < touchstartX) alert('swiped left!')
if (touchendX > touchstartX) alert('swiped right!')
}
slider.addEventListener('touchstart', e => {
touchstartX = e.changedTouches[0].screenX
})
slider.addEventListener('touchend', e => {
touchendX = e.changedTouches[0].screenX
handleGesture()
})
您可以对垂直滑动使用完全相同的逻辑。
Mar*_*lln 27
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();
hel*_*dre 14
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.
Gri*_*inn 14
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!");
});
Joh*_*rty 11
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:
document.addEventListener('swiped-left', function(e) {
console.log(e.target); // the element that was swiped
});
document.addEventListener('swiped-right', function(e) {
console.log(e.target); // the element that was swiped
});
document.addEventListener('swiped-up', function(e) {
console.log(e.target); // the element that was swiped
});
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
});
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).
<div data-swipe-threshold="10"
data-swipe-timeout="1000"
data-swipe-ignore="false">
Swiper, get swiping!
</div>
源代码可在Github上找到
nas*_*eez 10
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:
我只想检测向左和向右滑动，但仅在触摸事件结束时触发操作，因此我稍微修改了@givanse 的出色答案来做到这一点。
为什么要这么做？例如，如果在滑动时，用户注意到他最终不想滑动，他可以将手指移动到原始位置（一个非常流行的“约会”电话应用程序就是这样做的;）），然后“向右滑动”活动被取消。
因此，为了避免仅仅因为水平方向存在 3px 差异而发生“向右滑动”事件，我添加了一个阈值，低于该阈值的事件将被丢弃：为了发生“向右滑动”事件，用户必须至少滑动浏览器宽度的1/3（当然你可以修改这个）。
所有这些小细节都增强了用户体验。
请注意，目前，如果两根手指之一在捏合缩放期间进行较大的水平移动，则“触摸捏合缩放”可能会被检测为滑动。
这是（普通 JS）代码：
var xDown = null, yDown = null, xUp = null, yUp = null;
document.addEventListener('touchstart', touchstart, false);
document.addEventListener('touchmove', touchmove, false);
document.addEventListener('touchend', touchend, false);
function touchstart(evt) { const firstTouch = (evt.touches || evt.originalEvent.touches)[0]; xDown = firstTouch.clientX; yDown = firstTouch.clientY; }
function touchmove(evt) { if (!xDown || !yDown ) return; xUp = evt.touches[0].clientX; yUp = evt.touches[0].clientY; }
function touchend(evt) {
var xDiff = xUp - xDown, yDiff = yUp - yDown;
if ((Math.abs(xDiff) > Math.abs(yDiff)) && (Math.abs(xDiff) > 0.33 * document.body.clientWidth)) {
if (xDiff < 0)
document.getElementById('leftnav').click();
else
document.getElementById('rightnav').click();
}
xDown = null, yDown = null;
}
小智 6
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;
}
};
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;
}
在这里添加这个答案。这增加了对鼠标事件的支持，以便在桌面上进行测试：
<!--scripts-->
class SwipeEventDispatcher {
constructor(element, options = {}) {
this.evtMap = {
SWIPE_LEFT: [],
SWIPE_UP: [],
SWIPE_DOWN: [],
SWIPE_RIGHT: []
};
this.xDown = null;
this.yDown = null;
this.element = element;
this.isMouseDown = false;
this.listenForMouseEvents = true;
this.options = Object.assign({ triggerPercent: 0.3 }, options);
element.addEventListener('touchstart', evt => this.handleTouchStart(evt), false);
element.addEventListener('touchend', evt => this.handleTouchEnd(evt), false);
element.addEventListener('mousedown', evt => this.handleMouseDown(evt), false);
element.addEventListener('mouseup', evt => this.handleMouseUp(evt), false);
}
on(evt, cb) {
this.evtMap[evt].push(cb);
}
off(evt, lcb) {
this.evtMap[evt] = this.evtMap[evt].filter(cb => cb !== lcb);
}
trigger(evt, data) {
this.evtMap[evt].map(handler => handler(data));
}
handleTouchStart(evt) {
this.xDown = evt.touches[0].clientX;
this.yDown = evt.touches[0].clientY;
}
handleMouseDown(evt) {
if (this.listenForMouseEvents==false) return;
this.xDown = evt.clientX;
this.yDown = evt.clientY;
this.isMouseDown = true;
}
handleMouseUp(evt) {
if (this.isMouseDown == false) return;
const deltaX = evt.clientX - this.xDown;
const deltaY = evt.clientY - this.yDown;
const distMoved = Math.abs(Math.abs(deltaX) > Math.abs(deltaY) ? deltaX : deltaY);
const activePct = distMoved / this.element.offsetWidth;
if (activePct > this.options.triggerPercent) {
if (Math.abs(deltaX) > Math.abs(deltaY)) {
deltaX < 0 ? this.trigger('SWIPE_LEFT') : this.trigger('SWIPE_RIGHT');
} else {
deltaY > 0 ? this.trigger('SWIPE_UP') : this.trigger('SWIPE_DOWN');
}
}
}
handleTouchEnd(evt) {
const deltaX = evt.changedTouches[0].clientX - this.xDown;
const deltaY = evt.changedTouches[0].clientY - this.yDown;
const distMoved = Math.abs(Math.abs(deltaX) > Math.abs(deltaY) ? deltaX : deltaY);
const activePct = distMoved / this.element.offsetWidth;
if (activePct > this.options.triggerPercent) {
if (Math.abs(deltaX) > Math.abs(deltaY)) {
deltaX < 0 ? this.trigger('SWIPE_LEFT') : this.trigger('SWIPE_RIGHT');
} else {
deltaY > 0 ? this.trigger('SWIPE_UP') : this.trigger('SWIPE_DOWN');
}
}
}
}
// add a listener on load
window.addEventListener("load", function(event) {
const dispatcher = new SwipeEventDispatcher(document.body);
dispatcher.on('SWIPE_RIGHT', () => { console.log('I swiped right!') })
dispatcher.on('SWIPE_LEFT', () => { console.log('I swiped left!') })
});
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