我正在和朋友一起写一个网站，我需要创建一个javascript循环，用于从数据库中提取图像并在网格上的xy位置填充它们。
我们使用的数据库是用python和django构建的，但是现在我正试图让它使用一个循环和一个测试图像。
这是有问题的循环：
function createImages(){
var picture = document.createElement('img');{
for (var pic=0; pic < 100; pic++) {
pic.pk = 1;
pic.model = 'image';
pic.fields.title = 'Image Test';
pic.fields.timestamp = '2013-01-01T00:00:00.000Z';
pic.fields.image = 'http://i240.photobucket.com/albums/ff301/quyenhiepkhach/CAT.jpg';
pic.fields.height = 30 + 'px';
pic.fields.width = 30 + 'px';
pic.fields.link = '#ImageLink';
pic.fields.board = 1;
pic.fields.posx = 100 + 'px';
pic.fields.posy = 50 + 'px';
pic.fields.owner = 1;
pic.fields.region = 1;
picture.className = 'image-tooltip';
picture.src = pic.fields.image;
picture.style.marginTop = pic.fields.posy;
picture.style.marginLeft = pic.fields.posx;
picture.style.height = pic.fields.height;
picture.style.width = pic.fields.width;
document.body.appendChild(picture);
}
}
};
createimages();
到目前为止我的工作：
到目前为止，我打破了什么：
我已将以下所有内容都包含在内以制作网页，还包含 jsFiddle
HTML HEAD：
<!-- Le random script for mouseover -->
<script type="text/javascript" src="http://code.jquery.com/jquery-git.js"></script>
<!--MOUSEOVER SCRIPT FOR GRID COORDINATES-->
<script>
$(window).load(function(){
var tooltip = $( '<div id="tooltip">' ).appendTo( 'body' )[0];
$( '.coords' ).
each(function () {
var pos = $( this ).offset(),
top = pos.top,
left = pos.left,
width = $( this ).width(),
height = $( this ).height();
$( this ).
mousemove(function ( e ) {
var x = ( (e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft) - left ) .toFixed( 0 ),
y = ( ( (e.clientY + document.body.scrollTop + document.documentElement.scrollTop) - top ) ) .toFixed( 0 );
if ( x > 20 && x < 481 && y > 20 && y < 321) {
$( tooltip ).text( 'prime | ' + x + ', ' + y ).css({
left: e.clientX + 20,
top: e.clientY + 10
}).show();
}
else {
$( tooltip ).text( 'standard | ' + x + ', ' + y ).css({
left: e.clientX + 20,
top: e.clientY + 10
}).show();
}
}).
mouseleave(function () {
$( tooltip ).hide();
});
});
});
</script>
<!--MOUSEOVER SCRIPT FOR IMAGES-->
<script>
$(window).load(function(){
var imagetooltip = $( '<div id="imagetooltip">' ).appendTo( 'body' )[0];
$( '.image-tooltip' ).
each(function () {
$( imagetooltip ).text( pic.fields.title + ' , ' + pic.fields.link ).css({
left: e.clientX + 20,
top: e.clientY + 10
}).show();
mouseleave(function () {
$( tooltip ).hide();
});
});
});
</script>
CSS：
/* Style for standard section on grid */
.grid {
margin: 0px auto auto;
border: 1px solid #000;
border-width: 0 1px 1px 0;
background-color: #28ACF9;
}
/* Style for grid div */
.grid div {
border: 1px solid #000;
border-width: 1px 0 0 1px;
float: left;
}
/* Style for prime section on grid */
.gridprime {
margin-top: 50px ;
margin-left: 50px;
border: 1px solid #000;
background-color: #FFFF33;
float: left;
}
/* Style for grid coords tooltip */
#tooltip {
text-align:center;
background:black;
color:white;
padding:3px 0;
width:150px;
position:fixed;
display:none;
white-space:nowrap;
z-index:3;
}
/* Style for image tooltip */
#imagetooltip {
text-align:left;
background:#CCC;
color:white;
padding:3px 0;
width:200px;
position:fixed;
display:none;
white-space:nowrap;
z-index:4;
}
HTML BODY：
<!--SCRIPT TO CREATE THE GRID (WORKING)-->
<script type="text/javascript">
function creategrid(size){
var primeW = Math.floor((460) / size),
primeH = Math.floor((300) / size),
standardW = Math.floor((500) / size),
standardH = Math.floor((500) / size);
var standard = document.createElement('div');
standard.className = 'grid coords';
standard.style.width = (standardW * size) + 'px';
standard.style.height = (standardH * size) + 'px';
standard.board = '1';
var prime = document.createElement('div');
prime.className = 'gridprime';
prime.style.width = (primeW * size) + 'px';
prime.style.height = (primeH * size)+ 'px';
prime.style.position = 'absolute'
prime.style.zIndex= '1';
standard.appendChild(prime);
for (var i = 0; i < standardH; i++) {
for (var p = 0; p < standardW; p++) {
var cell = document.createElement('div');
cell.style.height = (size - 1) + 'px';
cell.style.width = (size - 1) + 'px';
cell.style.position = 'relative'
cell.style.zIndex= '2';
standard.appendChild(cell);
}
}
document.body.appendChild(standard);
}
creategrid(10);
</script>
<!--SCRIPT TO LOOP IMAGES OUT OF DATABASE (USING 1 TO TEST FOR NOW)-->
<script type="text/javascript">
function createImages(){
var picture = document.createElement('img');{
for (var pic=0; pic < 100; pic++) {
pic.pk = 1;
pic.model = 'image';
pic.fields.title = 'Image Test';
pic.fields.timestamp = '2013-01-01T00:00:00.000Z';
pic.fields.image = 'http://i240.photobucket.com/albums/ff301/quyenhiepkhach/CAT.jpg';
pic.fields.height = 30 + 'px';
pic.fields.width = 30 + 'px';
pic.fields.link = '#ImageLink';
pic.fields.board = 1;
pic.fields.posx = 100 + 'px';
pic.fields.posy = 50 + 'px';
pic.fields.owner = 1;
pic.fields.region = 1;
picture.className = 'image-tooltip';
picture.src = pic.fields.image;
picture.style.marginTop = pic.fields.posy;
picture.style.marginLeft = pic.fields.posx;
picture.style.height = pic.fields.height;
picture.style.width = pic.fields.width;
if (pic.fields.board = document.body.id);{
document.body.appendChild(picture);
}
}
}
};
createimages();
</script>
答案 0 :(得分：1)
您的代码中存在各种错误
此处pic是一个数字，但您似乎在设置属性，因为它是一个对象文字
for (var pic=0; pic < 100; pic++) {
pic.pk = 1;
此行也将失败，因为您需要先创建pic.fields对象
pic.fields = {}; // <-- add this line
pic.fields.title = 'Image Test';
您的功能称为createImages，但您尝试拨打createimages（区分大小写）
我建议您查看浏览器控制台（通常是F12）以检查错误
答案 1 :(得分：1)
您的代码充满了语法错误和逻辑问题。 使用浏览器控制台查看错误并进行相应修复。
另请注意，javascript区分大小写，因此如果您创建函数createImages()，则需要使用相同的大小写来调用函数。您正在调用不存在的createimages()
您无法使用pic作为变量在for循环中创建对象，其中pic是计数器。
还需要在循环内创建新图像，而不是在它之外。
工作代码：
//SCRIPT TO LOOP IMAGES OUT OF DATABASE (USING 1 TO TEST FOR NOW)//
function createImages() {
for (var pic = 0; pic < 100; pic++) {
/* new image for each pass of loop*/
var picture = document.createElement('img');
var data = {
pk: 1,
model: 'image',
fields: {
title: 'Image Test',
timestamp: '2013-01-01T00:00:00.000Z',
image: 'http://i240.photobucket.com/albums/ff301/quyenhiepkhach/CAT.jpg',
height: 30 + 'px',
width: 30 + 'px',
link: '#ImageLink',
board: 1,
posx: 100 + 'px',
posy: 50 + 'px',
owner: 1,
region: 1
}
};
picture.className = 'image-tooltip';
picture.src = data.fields.image;
picture.style.marginTop = data.fields.posy;
picture.style.marginLeft = data.fields.posx;
picture.style.height = data.fields.height;
picture.style.width = data.fields.width;
/* comment out "if" since isn't true*/
// if (data.fields.board ==document.body.id) {
document.body.appendChild(picture);
// }
}
}
createImages();