移动手机APP手指滑动切换图片特效附源码下载

前端技术 2023/09/07 JavaScript

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。

效果演示          源码下载

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

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。

$(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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