js实现滑动插件的方法介绍

js实现滑动插件的方法有哪些?今天创新互联小编给大家总结了以下内容,一起来看看吧。

创新互联专业为企业提供平鲁网站建设、平鲁做网站、平鲁网站设计、平鲁网站制作等企业网站建设、网页设计与制作、平鲁企业网站模板建站服务,十余年平鲁做网站经验,不只是建网站,更提供有价值的思路和整体网络服务。

js实现滑动插件的方法介绍

基本思路是封装一个Slider类, 拥有默认初始配置参数。

Slider.prototype(原型链上)拥有实现滑动的方法,通过监听手势,实现滑动的效果。

比较复杂的滑动效果, 可以使用Swiper.js 来实现。

代码如下:

/* PollyFill for iOS 5.* */
if (!Function.prototype.bind) {
  Function.prototype.bind = function (oThis) {
    var args = Array.prototype.slice.call(arguments, 1)
    var f2bind = this
    var fnop = function () {}
    var bound = function () {
      return f2bind.apply(this instanceof fnop && oThis
        ? this
        : oThis,
        args.concat(Array.prototype.slice.call(arguments)))
    }
    fnop.prototype = this.prototype
    bound.prototype = new fnop()
    return bound
  }
}

// 添加浏览器前缀
function prefix(style) {
  var vendor = (function() {
    var transArr = ['transform', 'webkitTransform', 'MozTransform', 'msTranform', 'OTransform'],
      vendors = ['', 'webkit', 'Moz', 'ms', 'O'],
      elementStyle = document.createElement('div').style

    for (var i = 0; i < vendors.length; i++) {
      if (transArr[i] in elementStyle) {
        return vendors[i]
      }
    }

    return false
  })()

  if (vendor === false) return false
  if (vendor === '') return style
  return vendor + style.charAt(0).toUpperCase() + style.substr(1)
}

var TRANSFORM = prefix('transform'),
  TRANSITION = prefix('transition')

var Slider = function(options) {
  // 初始化配置参数
  this.options = $.extend({
    slideWrap: '.pages',  // 容器
    slideItem: '.page', // 滑动单元的元素
    direction: 'Y', // 滑动的方向
    effect: 'slide',  // 滑动的效果
    triggleDist: 100,  // 触发滑动的手指移动最小位移
    followFinger: true, // 是否跟随手指移动
    duration: .4,  // 翻页的延时
    currentIdx: 0  // 初始显示的页码
  }, options)

  var EffectDict = {
    'slide' : ['slide', 'slide'],
    'scale' : ['slide', 'scale']
  }

  this.pagesWrap = document.querySelector(this.options.slideWrap)
  this.pages = document.querySelectorAll(this.options.slideItem)

  this.hook = this.options.slideController
  this._total = this.pages.length
  this._pageX = 0
  this._pageY = 0
  this._distance = 0 // 页面之间切换的距离
  this._moveDist = 0 // touch 滑动的距离
  this._supportTouch = 'ontouchend' in window
  this._touching = false

  this._enter = this[EffectDict[this.options.effect][0]].bind(this)
  this._leave = this[EffectDict[this.options.effect][1]].bind(this)

  this._init()
  this._bindEvents()
}
Slider.prototype = {
  _init: function() {
    var width = this.pagesWrap.clientWidth,
      height = this.pagesWrap.clientHeight,
      currentIdx = this.options.currentIdx,
      pages = this.pages,
      total = this._total,
      distance = this._distance = (this.options.direction == 'Y' ? height : width)

    // 初始化各个 page 的位置
    for (var i = 0; i < this._total; i++) {
      if (i == currentIdx) {
        pages[i].classList.add('current')
      } else {
        this._enter(pages[i], i < currentIdx ? -distance : distance, 2)
      }
    }
  },

  _bindEvents: function() {
    var _this = this,
      pagesWrap = this.pagesWrap

    var events = this._supportTouch ? 'touchstart touchmove touchend touchcancel' : 'mousedown mousemove mouseup mousecancel'

    events.split(' ').forEach(function(e) {
      pagesWrap.addEventListener(e, _this)
    })

    window.addEventListener('orientationchange', this)
    window.addEventListener('resize', this)
  },

  handleEvent: function(e) {
    switch (e.type) {
      case 'orientationchange':
      case 'resize':
        this._init()
        break
      case 'touchstart':
      case 'mousedown':
        this._start(e)
        break
      case 'touchmove':
      case 'mousemove':
        this._move(e)
        break
      case 'touchend':
      case 'touchcancel':
      case 'mouseup':
      case 'mousecancel':
        this._end(e)
        break
    }
  },

  _start: function(e) {
    if (this._touching) {
      e.preventDefault()
      e.stopPropagation()
      return
    }

    this._touching = true
    this._moveDist = 0

    var touches = (this._supportTouch ? e.touches[0] : e),
      distance = this._distance,
      enter = this._enter

    var $current = this.pages[this.options.currentIdx],
      $next = $current.nextElementSibling,
      $prev = $current.previousElementSibling

    this._pageX = touches.pageX
    this._pageY = touches.pageY

    $current.style.zIndex = 1

    if ($next) {
      $next.style.zIndex = 2
      enter($next, distance)
    }

    if ($prev) {
      $prev.style.zIndex = 2
      enter($prev, -distance)
    }
  },

  _move: function(e) {
    e.preventDefault()

    if (!this._touching) return

    var touches = (this._supportTouch ? e.touches[0] : e),
      direction = this.options.direction,
      distance = this._distance

    var currentIdx = this.options.currentIdx,
      $current = this.pages[this.options.currentIdx],
      $next = $current.nextElementSibling,
      $prev = $current.previousElementSibling,
      xDist = touches.pageX - this._pageX,
      yDist = touches.pageY - this._pageY,
      enter = this._enter,
      leave = this._leave,
      moveDist = this._moveDist = (direction == 'X' ? xDist : yDist)

    if (this.options.followFinger) {
      $next && enter($next, moveDist + distance)
      $prev && enter($prev, moveDist - distance)

      // 因为不能翻页,所以制造拖动困难的效果
      if ((currentIdx == 0 && moveDist > 0) || (currentIdx == this._total && moveDist < 0)) {
        return this.slide($current, moveDist / 4)
      }

      leave($current, moveDist)
    }
  },

  _end: function(e) {
    var move = this._moveDist,
      distance = this._distance,
      triggleDist = this.options.triggleDist,
      enter = this._enter,
      $current = this.pages[this.options.currentIdx],
      $next = $current.nextElementSibling,
      $prev = $current.previousElementSibling

    this._touching = false

    this._enter($current, 0)
    $next && enter($next, distance)
    $prev && enter($prev, -distance)

    if ($next && move < -triggleDist && this.hook.shouldGoToNext($current)) return this._next()
    if ($prev && move > triggleDist && this.hook.shouldGoToPrev($current)) return this._prev()
  },

  _next: function() {
    this.go2page(this.options.currentIdx + 1)
  },

  _prev: function() {
    this.go2page(this.options.currentIdx - 1)
  },

  go2page: function(idx) {

    var $current = this.pages[this.options.currentIdx],
      $target = this.pages[idx],
      enter = this._enter,
      leave = this._leave,
      distance = (idx < this.options.currentIdx ? this._distance : -this._distance)

    $($target).one('webkitTransitionEnd', function() {
      $current.classList.remove('current')
      $target.classList.add('current')
      this.hook.didGoToPage($target, $current)
    }.bind(this))

    leave($current, distance)
    enter($target, 0)

    this._moveDist = 0
    this.options.currentIdx = idx
  },


  /**
   * 切页的效果
   * 目前只支持两种效果:
   * 1. Slide(普通的滑动)
   * 2. Scale(缩放滑动)
   */
  slide: function(el, val, need) {
    need = need || 1
    el.style.webkitTransition = (need == 1) ? 'all 0.4s' : ''
    el.style[TRANSFORM] = 'translate3d(' + ('Y' == this.options.direction ? '0, ' + val + 'px' : (val + 'px, 0')) + ',0)'
  },

  scale: function(el, val) {
    el.style.webkitTransition = 'all 0.4s'
    el.style[TRANSFORM] = 'scale(' + (1 - Math.round(Math.abs(val) / this._distance / 4*100) / 100) + ') translateZ(0)'
  }
}

var slideController = {
  shouldGoToPrev: function(el) {
    return false;
  },
  shouldGoToNext: function(el) {
    return false;;
  },
  didGoToPage: function(el, prevEl) {
    return false;
  }
}


function query(selector){
  return document.querySelector(selector);
}

关于js实现滑动插件的方法介绍就分享到这里了,当然并不止以上和大家分析的办法,不过小编可以保证其准确性是绝对没问题的。希望以上内容可以对大家有一定的参考价值,可以学以致用。如果喜欢本篇文章,不妨把它分享出去让更多的人看到。

文章名称:js实现滑动插件的方法介绍
网站URL:https://www.cdcxhl.com/article2/gsidoc.html

成都网站建设公司_创新互联,为您提供域名注册定制网站云服务器虚拟主机动态网站手机网站建设

广告

声明:本网站发布的内容(图片、视频和文字)以用户投稿、用户转载内容为主,如果涉及侵权请尽快告知,我们将会在第一时间删除。文章观点不代表本网站立场,如需处理请联系客服。电话:028-86922220;邮箱:631063699@qq.com。内容未经允许不得转载,或转载时需注明来源: 创新互联

成都网站建设