javascript - 更改div的背景图片url

Question

我有一个 div，我想通过更改 css 背景图像来在背景中显示多个图像作为淡入淡出，但我无法找到最佳方法。

JSFiddle

我的 HTML:

<div id="background"></div>

Jquery

var bgArr = ["http://malsup.github.io/images/p1.jpg", "http://malsup.github.io/images/p1.jpg", "images/TopImage-03.jpg"];
var i = 0;

// Start the slide show
var interval = self.setInterval("swapBkgnd()", 5000)

function swapBkgnd() {
  if (i > (bgArr.length - 1)) {
    i = 0
    $("#background").css("background-image", "url(" + bgArr[i] + ")");
  } else {
    $("#background").css("background-image", "url(" + bgArr[i] + ")");
  }
  i++;
};

CSS:

#background {
  position: absolute;
  min-height: 100%;
  width: 100%;
  height: auto;
  top: 0;
  left: 0;
  background: url(http://2.bp.blogspot.com/-ayEwJpMGTPQ/USqliwPWo1I/AAAAAAAAHtI/ab6NHVy0Q48/s1600/tree.jpg) no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

Answer 1

用途:

Jsfiddle:http://jsfiddle.net/ook3ah4p/

var interval = self.setInterval(swapBkgnd, 5000) // true syntax

而不是:

var interval = self.setInterval("swapBkgnd()", 5000) // wrong syntax

对于动画:

$('#background')
    .animate({opacity: 0}, 'slow', function() {
        $(this)
            .css({'background-image': "url(" + bgArr[i] + ")"})
            .animate({opacity: 1});
    });