触摸屏上的“车轮"事件 [英] 'Wheel' events on touch screens

问题描述

我有这个小提琴 https://jsfiddle.net/316n1xmL/1/有效完美地满足了我在台式机上的需要.根据滚轮滚动方向向上或向下计数，并添加和删除类.我遇到的问题是如何在触摸屏上执行此操作.

I have this fiddle https://jsfiddle.net/316n1xmL/1/ which works perfectly how I need it to on desktop. Counts up or down based on wheel scroll direction and adds and removes classes. The issue I am running into is how to do this on touch screens.

我尝试过Hammer.js，但是它们的文档确实很糟糕，不清楚.

I have tried hammer.js but their documentation is really bad and not clear.

不幸的是，我正在构建的网站使用的是Bootstrap 4，这意味着我无法使用juqery mobile，因为BS4使用的jquery 3不支持jquery mobile.

Sadly the site I am building is using bootstrap 4 which means I cannot use juqery mobile since BS4 uses jquery 3 which does not support jquery mobile.

感谢您的帮助

// Scroll Direction Plugin Move Later to own file

!function(a){"function"==typeof define&&define.amd?define(["jquery"],a):"object"==typeof exports?module.exports=a:a(jQuery)}(function(a){function b(b){var g=b||window.event,h=i.call(arguments,1),j=0,l=0,m=0,n=0,o=0,p=0;if(b=a.event.fix(g),b.type="mousewheel","detail"in g&&(m=-1*g.detail),"wheelDelta"in g&&(m=g.wheelDelta),"wheelDeltaY"in g&&(m=g.wheelDeltaY),"wheelDeltaX"in g&&(l=-1*g.wheelDeltaX),"axis"in g&&g.axis===g.HORIZONTAL_AXIS&&(l=-1*m,m=0),j=0===m?l:m,"deltaY"in g&&(m=-1*g.deltaY,j=m),"deltaX"in g&&(l=g.deltaX,0===m&&(j=-1*l)),0!==m||0!==l){if(1===g.deltaMode){var q=a.data(this,"mousewheel-line-height");j*=q,m*=q,l*=q}else if(2===g.deltaMode){var r=a.data(this,"mousewheel-page-height");j*=r,m*=r,l*=r}if(n=Math.max(Math.abs(m),Math.abs(l)),(!f||f>n)&&(f=n,d(g,n)&&(f/=40)),d(g,n)&&(j/=40,l/=40,m/=40),j=Math[j>=1?"floor":"ceil"](j/f),l=Math[l>=1?"floor":"ceil"](l/f),m=Math[m>=1?"floor":"ceil"](m/f),k.settings.normalizeOffset&&this.getBoundingClientRect){var s=this.getBoundingClientRect();o=b.clientX-s.left,p=b.clientY-s.top}return b.deltaX=l,b.deltaY=m,b.deltaFactor=f,b.offsetX=o,b.offsetY=p,b.deltaMode=0,h.unshift(b,j,l,m),e&&clearTimeout(e),e=setTimeout(c,200),(a.event.dispatch||a.event.handle).apply(this,h)}}function c(){f=null}function d(a,b){return k.settings.adjustOldDeltas&&"mousewheel"===a.type&&b%120===0}var e,f,g=["wheel","mousewheel","DOMMouseScroll","MozMousePixelScroll"],h="onwheel"in document||document.documentMode>=9?["wheel"]:["mousewheel","DomMouseScroll","MozMousePixelScroll"],i=Array.prototype.slice;if(a.event.fixHooks)for(var j=g.length;j;)a.event.fixHooks[g[--j]]=a.event.mouseHooks;var k=a.event.special.mousewheel={version:"3.1.12",setup:function(){if(this.addEventListener)for(var c=h.length;c;)this.addEventListener(h[--c],b,!1);else this.onmousewheel=b;a.data(this,"mousewheel-line-height",k.getLineHeight(this)),a.data(this,"mousewheel-page-height",k.getPageHeight(this))},teardown:function(){if(this.removeEventListener)for(var c=h.length;c;)this.removeEventListener(h[--c],b,!1);else this.onmousewheel=null;a.removeData(this,"mousewheel-line-height"),a.removeData(this,"mousewheel-page-height")},getLineHeight:function(b){var c=a(b),d=c["offsetParent"in a.fn?"offsetParent":"parent"]();return d.length||(d=a("body")),parseInt(d.css("fontSize"),10)||parseInt(c.css("fontSize"),10)||16},getPageHeight:function(b){return a(b).height()},settings:{adjustOldDeltas:!0,normalizeOffset:!0}};a.fn.extend({mousewheel:function(a){return a?this.bind("mousewheel",a):this.trigger("mousewheel")},unmousewheel:function(a){return this.unbind("mousewheel",a)}})});

$(document).ready(function() {
    
    var counter = 0;
    var scrollThreshold = 15;

    var tiles = $('.list-tile');

    $(window).on('wheel', function(event){
        // deltaY obviously records vertical scroll, deltaX and deltaZ exist too
        if(event.originalEvent.deltaY < 0){
          // wheeled up
          counter--;
            if (Math.abs(counter) >= scrollThreshold) {
                tiles.filter('.animate-up').not('.first').last().removeClass('animate-up');
                counter = 0;
            }
        }
        else {
            // wheeled down
            counter++;
            if (counter >= scrollThreshold) {
                tiles.not('.animate-up').eq(0).addClass('animate-up');
                counter = 0;
            }
        }
      });

});

.hero-list {
  height: 100vh;
  width: 100%;
  touch-action: pan-x;
  user-select: none;
  -webkit-user-drag: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  position: relative;
  overflow: hidden;
}
.hero-list .hero-list-container {
  position: relative;
  z-index: 901;
  height: 100vh;
  overflow: hidden;
}
.hero-list .hero-list-container .list-tile {
  width: 100%;
  height: 100vh;
  margin: 0 auto;
  position: absolute;
  top: 0;
  left: 0;
  box-sizing: border-box;
  overflow: hidden;
  transform: translate3d(0, 100%, 0);
  transition-duration: 1s;
  transition-property: transform;
  transition-timing-function: cubic-bezier(0.165, 0.84, 0.44, 1);
  transition-delay: 0s;
}
.hero-list .hero-list-container .list-tile:nth-of-type(2) {
  background-color: green;
}
.hero-list .hero-list-container .list-tile:nth-of-type(3) {
  background-color: blue;
}
.hero-list .hero-list-container .list-tile .module-background {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  display: block;
  transition-duration: 1s;
  transition-property: transform;
  transition-timing-function: cubic-bezier(0.165, 0.84, 0.44, 1);
  transition-delay: 0s;
  transform: translate3d(0, -20%, 0) scale(1.5);
}
.hero-list .hero-list-container .list-tile.animate-up {
  transform: translate3d(0, 0%, 0) scale(1) !important;
}
.hero-list .hero-list-container .list-tile.animate-up .module-background {
  transform: translate3d(0, 0%, 0) scale(1) !important;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="hero-list">
				<div class="hero-list-container">
					<div class="list-tile animate-up">
						<div class="module-background" style="background-image: url('https://thomasstorage1.blob.core.windows.net/wp-media/2017/11/tech-background.png');
				background-size: cover;">

						</div>
					</div>

					<div class="list-tile">
						<div class="module-background" style="background-image: url('https://thomasstorage1.blob.core.windows.net/wp-media/2017/11/tech-background.png');
				background-size: cover;">

						</div>
					</div>

					<div class="list-tile">
						<div class="module-background" style="background-image: url('https://thomasstorage1.blob.core.windows.net/wp-media/2017/11/tech-background.png');
				background-size: cover;">

						</div>
					</div>

					<div class="list-tile">
						<div class="module-background" style="background-image: url('https://thomasstorage1.blob.core.windows.net/wp-media/2017/11/tech-background.png');
				background-size: cover;">

						</div>
					</div>
				</div>
			</div>

推荐答案

您需要通过检测触摸事件来重构您的插件. Hammer是一个很棒的库，可以涵盖所有手势类型.如果您需要更简单明了的内容，则可以通过纯JavaScript自己添加此功能:

You need to refactor a little bit Your plugin by detecting touch events. Hammer is a great library which can cover all the gesture types. If You need something lighter and straightforward, You can anyway add this functionality by yourself in plain JavaScript:

添加功能检测和触摸处理程序:

Add feature detection and touch handlers:

if("ontouchstart" in window){
   el.addEventListener('touchstart', touchStartHandler);
   el.addEventListener('touchmove', touchMoveHandler);
   el.addEventListener('touchend', touchEndHandler);
}

将实际上在您的onwheel处理程序内部的代码放入其自己的函数中.

Put the code which is actually inside Your onwheel handler in its own function.

现在，您应该决定要在插件中实现的行为:即滚动是在向下滑动期间发生还是仅在释放手指之后发生.在所需的触摸处理程序内(touchmove或touchend事件内)使用该功能.

Now, You should decide what behavior You are about to implement in Your plugin: i.e. either if the scroll should happen during swipe down, or only after the finger has been released. Use that function inside the desired touch handler, either inside the touchmove or inside the touchend event.

由于您需要使用最新的jQuery，因此我相信您不需要额外的向后跨浏览器兼容性，无论如何，这里是一个示例: https://stackoverflow.com/a/27024624/4845566 .

As You need to use latest jQuery, I believe You don't need extra backward cross-browser compatibility, anyway here is an example: https://stackoverflow.com/a/27024624/4845566.

最后，您可以通过允许触摸操作稍微倾斜(例如使用拇指)来为插件添加更多可用性.这是一个关于此主题的很好的讨论，其中包含您需要的所有源代码:对香草js的简单滑动检测

Lastly, You can add some more usability to Your plugin by allowing touch actions to be slightly diagonal, as by using the thumb is. Here is a nice discussion about this topic with all the source code You need: A simple swipe detection on vanilla js

这篇关于触摸屏上的“车轮"事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！