我试图通过JavaScript循环对象,并将该对象的所有子对象添加到HTML5画布。JavaScript循环/范围问题与Image.onload()
画布位正在工作,没有问题,但由于某种原因,我的所有图像最终都是相同的大小 - 最后一个子对象'背景'的大小。我假设它与我的循环和'this'的范围有关,但我真的不知道要改变什么;
var stage;
var items = {
head: {image: null, path: "images/avatar-elements/head01.png", w:200, h:200},
hair: {image: null, path: "images/avatar-elements/hair01.png", w:200, h:200},
nose: {image: null, path: "images/avatar-elements/nose01.png", w:200, h:200},
eyes: {image: null, path: "images/avatar-elements/eyes01.png", w:200, h:200},
eyebrows: {image: null, path: "images/avatar-elements/eyebrows01.png", w:200, h:200},
ears: {image: null, path: "images/avatar-elements/ears01.png", w:200, h:200},
background: {image: null, path: "images/avatar-elements/background01.png", w:500, h:370}
};
function initCanvas() {
stage = new Kinetic.Stage("canvas", 500, 370);
makeBasis();
}
function makeBasis() {
for(i in items) {
var img = new Image();
img.onload = function() {
items[i].image = makeCanvasImage(this, items[i].w, items[i].h);
}
img.src = items[i].path;
}
}
function makeCanvasImage(tar, w, h) {
var theImage = new Kinetic.Image({
imageObj: tar,
x: 250 - (w/2),
y: 185 - (h/2),
width: w,
height: h
});
stage.add(theImage);
return theImage;
}
initCanvas();
的可能重复[关闭的Javascript内循环 - 简单实用的例子(http://stackoverflow.com/questions/750486/javascript-closure-inside-loops-simple-practical-example ) – 2012-01-05 10:37:33