Trying to make multiple background images cycle through a slideshow with CSS and JQUERY

问题

I\'ve placed three background images in a div. I\'m trying to make all three of them cycle through on a timer that fades in and out. I\'ve actually found similar quesitons on here, but I cannot get them to work. Anyway, here\'s the relevant code:

HTML

<div id=\"slideshow\">    
</div>

CSS

#slideshow{
position:relative;
top:0;
width:100%;
height:635px;
background:
    url(\"car4.jpg\"),
    url(\"city.jpg\"),
    url(\"host3.jpg\");
background-repeat:no-repeat;
background-size:100%;
}

I\'m hoping to do this in CSS, but I\'m guessing it requires JQUERY; which I don\'t have much experience in. But that\'s OK.

I\'d really appreciate any help. Let me know if I can give you any more information. Thank you.

*** I\'ve tried css animations but I didn\'t get the results. Here\'s what I changed it to:

#slideshow{
   position:relative;
   top:0;
   width:100%;
   height:635px;
   background:url(\"car4.jpg\");
   background-repeat:no-repeat;
   background-size:100%;
   animation-name: one;
   animation-duration: 4s;
}
@keyframes one {
from {background: url(\"car4.jpg\");}
to {background: url(\"city.jpg\");}
}

This looks correct, but it still only showing the original image \"car4.jpg\" Thanks

回答1:

Try creating array from css background-image value , fading in , fading out first background image ; removing faded out background image from array , placing removed background image at last index of array ; resetting background image value to array joined by comma; fading in , fading out next , now first indexed background image ; cycling through fading in , fading out all background images ; recursively calling function , to attempt to create displayed effect of an "infinite" fade in , fade out "slideshow"

$(function() {
  // set `$.fx.interval` at `0`
  $.fx.interval = 0;
  (function cycleBgImage(elem, bgimg) {
// `elem`:`#slideshow`
// set, reset, delay to `1000` after background image reset
elem.css("backgroundImage", bgimg)
  // fade in background image
  .fadeTo(3000, 1, "linear", function() {
    // set `delay` before fadeing out image
    // fade in background image        
    $(this).delay(3000, "fx").fadeTo(3000, 0, "linear", function() {
      // split background image string at comma , creating array
      var img = $(this).css("backgroundImage").split(","),
        // concat first background image to `img` array,
        // remove first background image from `img` array
        bgimg = img.concat(img[0]).splice(1).join(",");
      // recursively call `cycleBgImage`
      cycleBgImage(elem, bgimg);
    });
  });
  }($("#slideshow")));
});

body {
  width: 400px;
  height: 400px;
}
/* set `#slideshow` parent background color */
.slideshow {
  background: #000;
  display:block;
  width:inherit;
  height:inherit;
}
#slideshow {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.0;
  background-color: #000;
  /* 
     set background images as `url(/path/to/image)` here, 
     separated by commas 
  */
  background-image: url("http://lorempixel.com/400/400/cats/?1"), 
    url("http://lorempixel.com/400/400/animals/?2"), 
    url("http://lorempixel.com/400/400/nature/?3"), 
    url("http://lorempixel.com/400/400/technics/?4"), 
    url("http://lorempixel.com/400/400/city/?5");
  background-size: cover, 0px, 0px, 0px;
/* set transtitions at 3000ms 
  -webkit-transition: background-image 3000ms linear;
  -moz-transition: background-image 3000ms linear;
  -ms-transition: background-image 3000ms linear;
  -o-transition: background-image 3000ms linear;
  transition: background-image 3000ms linear;
    */
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">
</script>
<div class="slideshow">
  <div id="slideshow"></div>
</div>

jsfiddle http://jsfiddle.net/gkjL6mdj/15/

回答2:

From the answer here and suggestion from @guest271314 try defining CSS 3 key frames for animation:

#slideshow{
       position:relative;
       top:0;
       width:100%;
       height:635px;
       background:
       url("car4.jpg"),
       url("city.jpg"),
       url("host3.jpg");
       background-repeat:no-repeat;
       background-size:100%;
       -moz-animation: swim 2s linear 0s infinite;
       -webkit-animation: swim 2s linear 0s infinite;
        animation: swim 2s linear 0s infinite;
}


@-moz-keyframes swim {
    from { background-position: 200% 0, 0 0; }
    to  { background-position: -100% 0, 0 0; }
}
@-webkit-keyframes swim {
    from { background-position: 200% 0, 0 0; }
    to  { background-position: -100% 0, 0 0; }
}
@keyframes swim {
    from { background-position: 200% 0, 0 0; }
    to  { background-position: -100% 0, 0 0; }
}

来源：https://stackoverflow.com/questions/30388118/trying-to-make-multiple-background-images-cycle-through-a-slideshow-with-css-and