我找到了一个可以随机定位 div / 图像的脚本。然而,它并没有完全按照我想要/需要的方式工作。
每个图像都加载在一个 div 中(我猜这并不理想)。我有大约 30 张图片。
但它们加载得不好并且var posy = (Math.random() * ($(document).height() - 0)).toFixed();
也不太好用。图像主要加载在顶部(我认为博客中的图像不算数,因此它会获得没有图像的高度?)
所以我想要的是:更好地加载它们 随机化它们,以便它们也到达页面底部
var circlePosition = document.getElementsByClassName('circle');
console.log(circlePosition);
function position() {
for (var i = 0; i < circlePosition.length; i++ ) {
//give circle a random position
var posx = (Math.random() * ($(document).width() - 0)).toFixed();
var posy = (Math.random() * ($(document).height() - 0)).toFixed();
//apply position to circle
$(circlePosition[i]).css({
'position':'absolute',
'left':posx+'px',
'top':posy+'px',
})
}
} //end function position
var circleTotal = circlePosition.length;
$('.circle').click(function() {
$(this).fadeOut();
circleTotal = circleTotal - 1;
console.log(circleTotal);
if(circleTotal == 0) {
position()
$('.circle').fadeIn();
}
});
position();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img src="//placehold.it/1x5000"> <!-- Placeholder image to show issue -->
<div class="circle">
<img src="http://static.tumblr.com/tensqk8/k8anq0438/01.png">
</div>
<div class="circle">
<img src="http://static.tumblr.com/tensqk8/k8anq0438/01.png">
</div>
一个干净、可读且不依赖 jQuery 的解决方案可能是这样的。它通过定位图像本身来避免不必要地将图像包装在 div 中。它包含一个隐藏元素,作为一种“穷人的”影子 DOM http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/.
http://jsfiddle.net/sean9999/yv9otwr7/9/ http://jsfiddle.net/sean9999/yv9otwr7/9/
;(function(window,document,undefined){
"use strict";
var init = function(){
var canvas = document.querySelector('#x');
var icon_template = document.querySelector('#template');
var icon_width = 40;
var icon_height = 30;
var the_images = [
'http://static.tumblr.com/tensqk8/k8anq0438/01.png',
'http://static.tumblr.com/tensqk8/rYanq05el/04.png',
'http://static.tumblr.com/tensqk8/SYknq05py/05.png',
'http://static.tumblr.com/tensqk8/s7inq057d/03.png'
];
var pickRandomImage = function(){
var i = Math.floor( Math.random() * the_images.length );
return the_images[i];
};
var total_number_of_images = 10;
var max_height = canvas.offsetHeight - icon_height;
var max_width = canvas.offsetWidth - icon_width;
var randomCoordinate = function(){
var r = [];
var x = Math.floor( Math.random() * max_width );
var y = Math.floor( Math.random() * max_height );
r = [x,y];
return r;
};
var createImage = function(){
var node = icon_template.cloneNode(true);
var xy = randomCoordinate();
node.removeAttribute('id');
node.removeAttribute('hidden');
node.style.top = xy[1] + 'px';
node.style.left = xy[0] + 'px';
node.setAttribute('src',pickRandomImage());
canvas.appendChild(node);
};
for (var i=0;i<total_number_of_images;i++){
createImage();
};
};
window.addEventListener('load',init);
})(window,document);
body {
background-color: #fed;
}
#x {
border: 3px solid gray;
background-color: white;
height: 400px;
position: relative;
}
#x .icon {
position: absolute;
z-index: 2;
}
<h1>Randomly distributed images</h1>
<div id="x"></div>
<img src="#" class="icon" hidden="hidden" id="template" />
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