使用 jQuery 拖动滚动页面

问题描述 投票：0回答：9

我试过使用 kinetic.js 和下面的代码，但是当我在 IE11 中尝试这个时，每次滚动时它都会跳到顶部：

$("html").kinetic();

我想让页面在平板电脑和 IE10 和 11 上可以滚动，这样用户就可以像在移动设备上一样向上推动页面向下滚动。

如何在不跳转到顶部的情况下在纯 JS 或 jQuery 中执行此操作？

javascript jquery html css kineticjs
9个回答
87
投票

您可以通过记录鼠标单击时的位置和拖动时的当前位置来非常简单地完成此操作。试试这个：

var clicked = false, clickY;
$(document).on({
    'mousemove': function(e) {
        clicked && updateScrollPos(e);
    },
    'mousedown': function(e) {
        clicked = true;
        clickY = e.pageY;
    },
    'mouseup': function() {
        clicked = false;
        $('html').css('cursor', 'auto');
    }
});

var updateScrollPos = function(e) {
    $('html').css('cursor', 'row-resize');
    $(window).scrollTop($(window).scrollTop() + (clickY - e.pageY));
}

要防止拖动时选择文本，请添加以下 CSS：

body {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

小提琴示例

更新

这里是上述版本的 jQuery 插件，经过扩展以允许通过设置进行垂直和水平滚动。它还允许您更改也使用过的

cursor
。

(function($) {
  $.dragScroll = function(options) {
    var settings = $.extend({
      scrollVertical: true,
      scrollHorizontal: true,
      cursor: null
    }, options);

    var clicked = false,
      clickY, clickX;

    var getCursor = function() {
      if (settings.cursor) return settings.cursor;
      if (settings.scrollVertical && settings.scrollHorizontal) return 'move';
      if (settings.scrollVertical) return 'row-resize';
      if (settings.scrollHorizontal) return 'col-resize';
    }

    var updateScrollPos = function(e, el) {
      $('html').css('cursor', getCursor());
      var $el = $(el);
      settings.scrollVertical && $el.scrollTop($el.scrollTop() + (clickY - e.pageY));
      settings.scrollHorizontal && $el.scrollLeft($el.scrollLeft() + (clickX - e.pageX));
    }

    $(document).on({
      'mousemove': function(e) {
        clicked && updateScrollPos(e, this);
      },
      'mousedown': function(e) {
        clicked = true;
        clickY = e.pageY;
        clickX = e.pageX;
      },
      'mouseup': function() {
        clicked = false;
        $('html').css('cursor', 'auto');
      }
    });
  }
}(jQuery))

$.dragScroll();
/* Note: CSS is not relevant to the solution. 
   This is only needed for this demonstration */

body,
html {
  padding: 0;
  margin: 0;
}

div {
  height: 1000px;
  width: 2000px;
  border-bottom: 3px dashed #EEE;
  /* gradient is only to make the scroll movement more obvious */
  background: rgba(201, 2, 2, 1);
  background: -moz-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -webkit-gradient(left top, right bottom, color-stop(0%, rgba(201, 2, 2, 1)), color-stop(16%, rgba(204, 0, 204, 1)), color-stop(31%, rgba(94, 0, 201, 1)), color-stop(43%, rgba(0, 153, 199, 1)), color-stop(56%, rgba(0, 199, 119, 1)), color-stop(69%, rgba(136, 199, 0, 1)), color-stop(83%, rgba(199, 133, 0, 1)), color-stop(100%, rgba(107, 0, 0, 1)));
  background: -webkit-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -o-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -ms-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: linear-gradient(-110deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  filter: progid: DXImageTransform.Microsoft.gradient( startColorstr='#c90202', endColorstr='#6b0000', GradientType=1);
  color: #EEE;
  padding: 20px;
  font-size: 2em;
}

body {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>First...</div>

<div>Second...</div>

10
投票

我只是想补充一下。使用 Rory 的代码，我进行了水平滚动。

var clicked = false, base = 0;

$('#someDiv').on({
    mousemove: function(e) {
        clicked && function(xAxis) {
            var _this = $(this);
            if(base > xAxis) {
                base = xAxis;
                _this.css('margin-left', '-=1px');
            }
            if(base < xAxis) {
                base = xAxis;
                _this.css('margin-left', '+=1px');
            }
        }.call($(this), e.pageX);
    },
    mousedown: function(e) {
        clicked = true;
        base = e.pageX;
    },
    mouseup: function(e) {
        clicked = false;
        base = 0;
    }
});
9
投票

此代码适用于水平和垂直鼠标拖动滚动。这很简单。

var curYPos = 0,
    curXPos = 0,
    curDown = false;

window.addEventListener('mousemove', function(e){ 
  if(curDown === true){
    window.scrollTo(document.body.scrollLeft + (curXPos - e.pageX), document.body.scrollTop + (curYPos - e.pageY));
  }
});

window.addEventListener('mousedown', function(e){ curDown = true; curYPos = e.pageY; curXPos = e.pageX; });
window.addEventListener('mouseup', function(e){ curDown = false; });
3
投票

基于Rory McCrossan的想法，用AngularJS2实现。

import {Directive, ElementRef, OnDestroy, Input} from "@angular/core";

declare var jQuery: any;

@Directive({
    selector: '[appDragScroll]'
})
export class DragScrollDirective implements OnDestroy {

    @Input() scrollVertical: boolean = true;
    @Input() scrollHorizontal: boolean = true;

    private dragging = false;
    private originalMousePositionX: number;
    private originalMousePositionY: number;
    private originalScrollLeft: number;
    private originalScrollTop: number;

    constructor(private nodeRef: ElementRef) {
        let self = this;

        jQuery(document).on({
            "mousemove": function (e) {
                self.dragging && self.updateScrollPos(e);
            },
            "mousedown": function (e) {
                self.originalMousePositionX = e.pageX;
                self.originalMousePositionY = e.pageY;
                self.originalScrollLeft = jQuery(self.nodeRef.nativeElement).scrollLeft();
                self.originalScrollTop = jQuery(self.nodeRef.nativeElement).scrollTop();
                self.dragging = true;
            },
            "mouseup": function (e) {
                jQuery('html').css('cursor', 'auto');
                self.dragging = false;
            }
        });

    }

    ngOnDestroy(): void {
        jQuery(document).off("mousemove");
        jQuery(document).off("mousedown");
        jQuery(document).off("mouseup");
    }

    private updateScrollPos(e) {
        jQuery('html').css('cursor', this.getCursor());

        let $el = jQuery(this.nodeRef.nativeElement);
        if (this.scrollHorizontal) {
            $el.scrollLeft(this.originalScrollLeft + (this.originalMousePositionX - e.pageX));
        }
        if (this.scrollVertical) {
            $el.scrollTop(this.originalScrollTop + (this.originalMousePositionY - e.pageY));
        }
    }

    private getCursor() {
        if (this.scrollVertical && this.scrollHorizontal) return 'move';
        if (this.scrollVertical) return 'row-resize';
        if (this.scrollHorizontal) return 'col-resize';
    }

}
2
投票

根据第一个答案，这是鼠标拖动时水平滚动的代码：

var clicked = false, clickX;
$(document).on({
    'mousemove': function(e) {
        clicked && updateScrollPos(e);
    },
    'mousedown': function(e) {
        e.preventDefault();        
        clicked = true;
        clickX = e.pageX;
    },
    'mouseup': function() {
        clicked = false;
        $('html').css('cursor', 'auto');
    }
});

var updateScrollPos = function(e) {
    $('html').css('cursor', 'grabbing');
    $(window).scrollLeft($(window).scrollLeft() + (clickX - e.pageX));
}
0
投票

我对 Rory 的代码做了相当多的修改，我让每个元素的侧边滚动都可以工作了。对于在 Web 应用程序的单个视图中具有多个可滚动图块的项目，我需要它。将 

.drag
类添加到任何元素，可能会做一些样式，它应该很好。

// jQuery sidescroll code. Can easily be modified for vertical scrolling as well.
// This code was hacked together so clean it up if you use it in prod.
// Written by Josh Moore
// Thanks to Rory McCrossan for a good starting point

// How far away the mouse should move on a drag before interrupting click
// events (your own code must also interrupt regular click events with a
// method that calls getAllowClick())
const THRESHOLD = 32;
var clicked = false;
var allowClick = true;

// mouseX: most recent mouse position. updates when mouse moves.
//     el: jQuery element that will be scrolled.
//    thX: "threshold X", where the mouse was at the beginning of the drag
var mouseX, startY, el, thX;

// Add the .drag class to any element that should be scrollable.
// You may need to also add these CSS rules:
//   overflow: hidden; /* can be replaced with overflow-x or overflow-y */
//   whitespace: none;
function drag() {
    $('.drag').on({
        'mousemove': e => {
            if (el != null && clicked) {
                el.scrollLeft(el.scrollLeft() + (mouseX - e.pageX));
                mouseX = e.pageX;
                allowClick = Math.abs(thX - mouseX) > THRESHOLD ? false : true;
            }
        },
        'mousedown': e => {
            clicked = true;
            // This lets the user click child elements of the scrollable.
            // Without it, you must click the .drag element directly to be able to scroll.
            el = $(e.target).closest('.drag');
            mouseX = e.pageX;
            thX = e.pageX;
        },
        'mouseup': e => {
            clicked = false;
            el = null;
            allowClick = true;
        }
    });
}

function getAllowClick() {
    return allowClick;
}

再次，我没有使用垂直滚动，但添加起来非常简单（用 Y 替换 X，

scrollTop()
而不是 
scrollLeft()
，等等）。希望这对将来的人有帮助！

0
投票

这个框架是用 vanilla javascript 编写的，最适合我。

它还支持 div 内的滚动条。

注意：如果您创建动态内容，请在渲染后调用

dragscroll.reset();
。

拖动滚动

用法

演示

0
投票

下面是一个基于单个元素类的简单滚动解决方案

      var cursordown = false;
      var cursorypos = 0;
      var cursorxpos = 0;
      $('.cursorgrab').mousedown(function(e){
        cursordown = true; 
        cursorxpos = $(this).scrollLeft() + e.clientX; 
        cursorypos = $(this).scrollTop() +e.clientY;
      }).mousemove(function(e){
        if(!cursordown) return;
        try { $(this).scrollLeft(cursorxpos - e.clientX); } catch(e) { }
        try { $(this).scrollTop(cursorypos - e.clientY); } catch(e) { }
      }).mouseup(end = function(e){
        cursordown = false;
      }).mouseleave(end)
        .css('user-select', 'none')
        .css('cursor', 'grab');

水平和垂直滚动都经过全面验证

你只需要将 .cursorgrab 类设置到你的元素中

0
投票

香草JS：

var clicked = false, clickY, clickX;
document.onmousemove = (e) => {
  clicked && updateScrollPos(e);
}
document.onmousedown = (e) => {
  clicked = true;
  clickY = e.pageY;
  clickX = e.pageX;
  document.querySelector("body").style.userSelect = "none";
}
document.onmouseup = (e) => {
  clicked = false;
  document.querySelector('html').style.cursor='grab';
}
var updateScrollPos = function(e) {
  document.querySelector('html').style.cursor='grabbing';
  window.scrollTo(window.scrollX + (clickX - e.pageX), window.scrollY + (clickY - e.pageY));
}
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