移动手机APP手指滑动切换图片特效附源码下载

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这是一款效果非常炫酷的移动手机APP滑动手指切换图片特效。该APP特效在移动手机中用户可以通过手指的左右滑动来切换图片，在桌面设备中通过鼠标也可达到同样的效果。

使用方法

HTML结构

这个移动手机APP切换图片特效的HTML结构采用嵌套<div>的HTML结构，每一张图片卡片都包裹在div.demo__card中，里面放置了图片，描述信息和一些额外的图层。

<div class="demo__card">
 <div class="demo__card__top brown">
 <div class="demo__card__img"></div>
 <p class="demo__card__name">Hungry cat</p>
 </div>
 <div class="demo__card__btm">
 <p class="demo__card__we">Whatever</p>
 </div>
 <div class="demo__card__choice m--reject"></div>
 <div class="demo__card__choice m--like"></div>
 <div class="demo__card__drag"></div>
</div>

m--reject是向左移动图片时的图层，m--like是向右移动图片时的图层，demo__card__drag是拖动层。

JavaScript

在jQuery代码中，pullChange()函数用于设置向左和向右两个滑动层的旋转角度和透明度。release()函数用于判断用户是向左还是向右滑动手指，并为这些动作在DOM元素上添加相应的class。

function pullChange() {
 animating = true;
 deg = pullDeltaX / 10;
 $card.css('transform', 'translateX(' + pullDeltaX + 'px) rotate(' + deg + 'deg)');
 var opacity = pullDeltaX / 100;
 var rejectOpacity = opacity >= 0 ? 0 : Math.abs(opacity);
 var likeOpacity = opacity <= 0 ? 0 : opacity;
 $cardReject.css('opacity', rejectOpacity);
 $cardLike.css('opacity', likeOpacity);
}
;
function release() {
 if (pullDeltaX >= decisionVal) {
  $card.addClass('to-right');
 } else if (pullDeltaX <= -decisionVal) {
  $card.addClass('to-left');
 }
 if (Math.abs(pullDeltaX) >= decisionVal) {
  $card.addClass('inactive');
  setTimeout(function () {
   $card.addClass('below').removeClass('inactive to-left to-right');
   cardsCounter++;
   if (cardsCounter === numOfCards) {
    cardsCounter = 0;
    $('.demo__card').removeClass('below');
   }
  }, 300);
 }
 if (Math.abs(pullDeltaX) < decisionVal) {
  $card.addClass('reset');
 }
 setTimeout(function () {
  $card.attr('style', '').removeClass('reset').find('.demo__card__choice').attr('style', '');
  pullDeltaX = 0;
  animating = false;
 }, 300);
};

最后监听mousedown和touchstart事件，并对非.inactive的卡片元素执行卡片切换操作。

使用方法

HTML结构

<div class="demo__card">
 <div class="demo__card__top brown">
 <div class="demo__card__img"></div>
 <p class="demo__card__name">Hungry cat</p>
 </div>
 <div class="demo__card__btm">
 <p class="demo__card__we">Whatever</p>
 </div>
 <div class="demo__card__choice m--reject"></div>
 <div class="demo__card__choice m--like"></div>
 <div class="demo__card__drag"></div>
</div>

m--reject是向左移动图片时的图层，m--like是向右移动图片时的图层，demo__card__drag是拖动层。

JavaScript

function pullChange() {
 animating = true;
 deg = pullDeltaX / 10;
 $card.css('transform', 'translateX(' + pullDeltaX + 'px) rotate(' + deg + 'deg)');
 var opacity = pullDeltaX / 100;
 var rejectOpacity = opacity >= 0 ? 0 : Math.abs(opacity);
 var likeOpacity = opacity <= 0 ? 0 : opacity;
 $cardReject.css('opacity', rejectOpacity);
 $cardLike.css('opacity', likeOpacity);
}
;
function release() {
 if (pullDeltaX >= decisionVal) {
  $card.addClass('to-right');
 } else if (pullDeltaX <= -decisionVal) {
  $card.addClass('to-left');
 }
 if (Math.abs(pullDeltaX) >= decisionVal) {
  $card.addClass('inactive');
  setTimeout(function () {
   $card.addClass('below').removeClass('inactive to-left to-right');
   cardsCounter++;
   if (cardsCounter === numOfCards) {
    cardsCounter = 0;
    $('.demo__card').removeClass('below');
   }
  }, 300);
 }
 if (Math.abs(pullDeltaX) < decisionVal) {
  $card.addClass('reset');
 }
 setTimeout(function () {
  $card.attr('style', '').removeClass('reset').find('.demo__card__choice').attr('style', '');
  pullDeltaX = 0;
  animating = false;
 }, 300);
};

最后监听mousedown和touchstart事件，并对非.inactive的卡片元素执行卡片切换操作。

$(document).on('mousedown touchstart', '.demo__card:not(.inactive)', function (e) {
 if (animating)
  return;
 $card = $(this);
 $cardReject = $('.demo__card__choice.m--reject', $card);
 $cardLike = $('.demo__card__choice.m--like', $card);
 var startX = e.pageX || e.originalEvent.touches[0].pageX;
 $(document).on('mousemove touchmove', function (e) {
  var x = e.pageX || e.originalEvent.touches[0].pageX;
  pullDeltaX = x - startX;
  if (!pullDeltaX)
   return;
  pullChange();
 });
 $(document).on('mouseup touchend', function () {
  $(document).off('mousemove touchmove mouseup touchend');
  if (!pullDeltaX)
   return;
  release();
 });
});

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