将过渡效果添加到div上的背景图像更改

Question

我正在使用jquery + css更改div的背景图像，如下所示：

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var slide_images = ["http://foodnetwork.sndimg.com/content/dam/images/food/fullset/2014/2/7/1/FNM_030114-Spaghetti-Carbonara-Recipe-h_s4x3.jpg", "http://www.labrasseriefirenze.it/labrasserie/wp-content/uploads/2013/12/spaghetti-carbonara.jpg"];
var slide_count = 0;


$(document).ready(function() {

      setInterval(function() {
          slide_count=++slide_count%slide_images.length;

          $('.slide_photo').css('background-image', 'url(\''+slide_images[slide_count]+'\')');
          }, 4000);

});

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.slide_photo {
  position: relative;
  top: 30px;
  width: 100%;
  height: 200px;
  background-image: url('http://foodnetwork.sndimg.com/content/dam/images/food/fullset/2014/2/7/1/FNM_030114-Spaghetti-Carbonara-Recipe-h_s4x3.jpg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100% auto;
  transition: all .2s ease;
}
.slide_photo:hover {
  background-size: 110% auto;
}

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div class="slide_photo"></div>

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问题是：是否可以添加淡入效果或转换以使更改更平滑？

Answer 1

像这样的css3动画怎么样

.slide_photo{
  -webkit-animation: fade 4s infinite;
  -moz-animation: fade 4s infinite;
  -o-animation: fade 4s infinite;
  animation: fade 4s infinite;
}

.slide_photo {
  position: relative;
  top: 30px;
  width: 100%;
  height: 200px;
  background-image: url('http://foodnetwork.sndimg.com/content/dam/images/food/fullset/2014/2/7/1/FNM_030114-Spaghetti-Carbonara-Recipe-h_s4x3.jpg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100% auto;
  transition: all .2s ease;
  -webkit-animation: fade 4s infinite;
  -moz-animation: fade 4s infinite;
  -o-animation: fade 4s infinite;
  animation: fade 4s infinite;
}
.slide_photo:hover {
  background-size: 110% auto;
}
@-webkit-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@-moz-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@-o-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

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var slide_images = ["http://foodnetwork.sndimg.com/content/dam/images/food/fullset/2014/2/7/1/FNM_030114-Spaghetti-Carbonara-Recipe-h_s4x3.jpg", "http://www.labrasseriefirenze.it/labrasserie/wp-content/uploads/2013/12/spaghetti-carbonara.jpg"];
var slide_count = 0;


$(document).ready(function() {

  setInterval(function() {
    slide_count = ++slide_count % slide_images.length;

    $('.slide_photo').css('background-image', 'url(\'' + slide_images[slide_count] + '\')');
  }, 4000);

});

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.slide_photo {
  position: relative;
  top: 30px;
  width: 100%;
  height: 200px;
  background-image: url('http://foodnetwork.sndimg.com/content/dam/images/food/fullset/2014/2/7/1/FNM_030114-Spaghetti-Carbonara-Recipe-h_s4x3.jpg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100% auto;
  transition: all .2s ease;
  -webkit-animation: fade 4s infinite;
  -moz-animation: fade 4s infinite;
  -o-animation: fade 4s infinite;
  animation: fade 4s infinite;
}
.slide_photo:hover {
  background-size: 110% auto;
}
@-webkit-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@-moz-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@-o-keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes fade {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div class="slide_photo"></div>

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