延迟队列功能仅在第一次迭代时有效 [英] Delay queue function works only on first iteration

问题描述

我有以下代码段:

$('.mobileBox').on('click', function() {
            $(this).toggleClass('expand');
            $(".mobile_nav").toggleClass('displayMobileNav');
            $(this).find('i').toggleClass('fa-ellipsis-h fa-times');
            //delay animations for 1 second in order to let width expand until the end 
            $(this).delay(1000).queue(function() {
                $(".mobile_nav li").each(function (i) { 
                    $(this).attr("style", "-webkit-animation-delay:" + i * 200 + "ms;"
                     + "-moz-animation-delay:" + i * 200 + "ms;"
                     + "-o-animation-delay:" + i * 200 + "ms;"
                     + "animation-delay:" + i * 200 + "ms;");
                    if (i == $(".mobile_nav li").size() -1) {
                        $(".mobile_nav").addClass("play");
                    }
                });
            });
        });

请参阅此小提琴

我如何重设延迟队列，因为它只能在第一次使用?

How can I reset delay queue as it only works for the first time?

推荐答案

您可以设置延迟和队列的名称，使用transitionend事件，在.expand元素上使用.one()调用.queue()来设置使用$.map()调用每个li元素的函数；在每个li元素的animationend事件中，使用.one()在队列中调用next函数.

You can set a name for the delay and queue, use transitionend event, .one() at .expand element to call .queue() to set a function to call for each li element using $.map(); at animationend event of each li element, call next function in queue using .one().

队列完成后，使用.promise()，.then()，删除style属性或设置包含animation属性的style属性，将元素的值设置为空字符串.

When queue is complete use .promise(), .then(), remove style attribute or set style attribute containing animation properties, values to empty string at the elements.

$(".mobile_navigation").addClass("mobileBox");
var li = $(".mobile_nav li");
var mobileBox = $(".mobileBox");
var mobileNav = $(".mobile_nav");
mobileBox.on('click', function() {
  // remove `style` attribute at `li` elements
  li.removeAttr("style");
  $(this).toggleClass('expand');

  mobileNav.toggleClass('displayMobileNav');
  $(this).find('i').toggleClass('fa-ellipsis-h fa-times');

});

mobileBox.parent()
  .on("transitionend", ".expand", function(event) {
    // do stuff at `transitionend` event of `.expand`,
    // queue a function for each `.mobile_nav li` element;
    // at `animationend` event of each `li` element
    // call next function in "transition" queue
    mobileBox
      .queue("transition", $.map(li, function(el) {
        return function(next) {
          $(el).attr("style",
           `-webkit-animation-delay:200ms;
            -moz-animation-delay:200ms;
            -o-animation-delay:200ms;
            animation-delay:200ms;
            -webkit-animation-play-state: running;
            -moz-animation-play-state: running;
            -o-animation-play-state: running;
            animation-play-state: running;`)
            .one("animationend", next)
        }
      }))
      .dequeue("transition")
      .promise("transition")
      .then(function() {
        // remove `style` attribute at `li` elements
        li.removeAttr("style")
      })
  })

.mobileBox {
  position: fixed;
  top: 0px;
  left: 0px;
  border-radius: 0px;
  width: 60px;
  height: 60px;
  background-color: rgb(52, 152, 219);
  z-index: 1;
  transition: width 1s;
}
.actionButton {
  position: fixed;
  top: 0px;
  left: 0px;
  width: 60px;
  height: 60px;
  padding: 10px;
  padding-top: 15px;
  text-align: center;
}
.mobileBox:hover,
:focus {
  background-color: rgba(51, 51, 51, 0.9);
}
.mobileBox.expand {
  width: 320px;
}
.mobile_nav {
  margin-top: 60px;
  list-style-type: none;
  width: 0px;
  padding-left: 0px;
  display: none;
}
.mobile_nav.displayMobileNav {
  display: block;
  width: 320px;
}
.mobile_nav li {
  background-color: rgba(52, 152, 219, 0.9);
  padding: 0.6em;
  color: white;
}
.mobile_nav a {
  color: white;
}
.mobile_nav li:hover {
  background-color: rgb(52, 152, 219);
}
.mobile_nav li {
  opacity: 0;
  position: relative;
  -webkit-animation: fadeIn 600ms ease both;
  -webkit-animation-play-state: paused;
  -moz-animation: fadeIn 600ms ease both;
  -moz-animation-play-state: paused;
  -o-animation: fadeIn 600ms ease both;
  -o-animation-play-state: paused;
  animation: fadeIn 600ms ease both;
  animation-play-state: paused;
}

@-webkit-keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-moz-keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-o-keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<div class="mobile_navigation">
  <div class="actionButton">
    <i class="fa fa-ellipsis-h fa-2x first"></i>
  </div>
  <ul class="mobile_nav">
    <li class=""><a href="http://www.w3schools.com/css/css_list.asp">About Me</a>
    </li>
    <li class=""><a href="http://www.w3schools.com/css/css_list.asp">Portfolio</a>
    </li>
    <li class=""><a href="http://www.w3schools.com/css/css_list.asp">References</a>
    </li>
    <li class=""><a href="http://www.w3schools.com/css/css_list.asp">Say hello!</a>
    </li>
  </ul>
</div>

jsfiddle https://jsfiddle.net/kx27vt6n/4/

jsfiddle https://jsfiddle.net/kx27vt6n/4/

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