Html5百叶窗效果

1，百叶窗布局 用定位(position: absolute)覆盖在content布局之上，背景设置为透明（background-color: transparent）
2，keyframes定义淡入淡出（透明度改变）和百叶窗口效果动画。
3，启动动画是通过设置DOM的className属性的方法，animator.className = 'baiyeWindow'; 监听动画完成事件'animationend'，要清除className属性。
4，在内容布局切换的事件，调用启动动画方法，两个布局都需要绑定切换事件 ng-click="switchLayout()"
5，动画执行时序图：

animation time.png

...
 
       

        

        

        

  

  //谈入谈出效果
 .fade-animation{
        @-webkit-keyframes fadeInOut {          0% {
            opacity: 1;
          }          50% {
            opacity: 0;
          }          100% {
            opacity: 1;
          }
        }
    @keyframes fadeInOut {          0% {
            opacity: 1;
          }          50% {
            opacity: 0;
          }          100% {
            opacity: 1;
          }
        }
        animation: fadeInOut 1s ease-in;
        -webkit-animation: fadeInOut 1s ease-in;
      }      //百叶窗效果
      .baiyeWindow{
        width: 100%;
        height: 1.68rem;
        position: absolute;
        left: 0;
        top: 1.2rem;
        li{
          height: 0.42rem;
          line-height: 40px;
          overflow: hidden;
          background-color: transparent;
          .ye{
            -webkit-animation: slideOut 1s ease-in-out;
            animation: slideOut 1s ease-in-out;
            width: 100%;
            background-color: rgba(0,0,0,.2);
            position: relative;
            top: 50%;
          }
        }
        @-webkit-keyframes slideOut {          0% {
            padding-bottom: 0;
            top: 50%;
          }          100% {
            padding-bottom: 40px;
            top: 0;
          }
        }
        @keyframes slideOut {          0% {
            padding-bottom: 0;
            top: 50%;
          }          100% {
            padding-bottom: 40px;
            top: 0;
          }
        }
      }

//切换布局$scope.switchLayout = function(){
    ...
    $scope.startBaiYeWindow();    //启动动画0.5s后，控制布局显示/隐藏
    $timeout(function () {             if ($scope.show) {
                  $scope.show = false;
              } else {
                    ....
              }
     }, 500);
 }//启动动画
        $scope.startBaiYeWindow = function () {            var animator = document.getElementById('baiyeWindow');            var animatorFadeInOut = document.getElementById('fadeInOut');
            animator.addEventListener('animationend', function () {
                animator.className = '';
                animatorFadeInOut.className = 'content';
            });
            $timeout(function () {
                animator.className = 'baiyeWindow';
                animatorFadeInOut.className = 'content fade-animation';
            }, 0);
        };

作者：竿牍
链接：https://www.jianshu.com/p/155a05fa5723