我在循环中创建了几个动态图像并将它们保存在一个数组中。现在我想为每个图像创建一个 onclick 函数，将其删除。 代码如下:
var arr = [];
for (var i = 0; i < 30; i++) {
var osix = new Kinetic.Image({
image: images.Osi1,
x: Math.floor(Math.random()*900+0),
y: Math.floor(Math.random()*600+0)
});
arr.push(osix); //works fine
}
for (image in arr) {
arr[image].on('click', function() {
writeMessage(score_counter); //also works fine
arr[image].remove(); //no error, but the removal is not appearing
layer.draw();
score_counter += 1;
if (score_counter >= 20) {finishing_fun();}
});
}
如果我这样做，它就会起作用:
var osi1 = new Kinetic.Image({
image: images.Osi1,
x: Math.floor(Math.random()*900+0),
y: Math.floor(Math.random()*600+0)
});
osi1.on('click', function() {
writeMessage('50!!');
osi1.remove();
layer.draw();
score_counter += 1;
if (score_counter >= 20) {finishing_fun();};
}
最佳答案
当您的点击函数被调用时，索引(图像)不再可用。
因此，在您的点击函数中使用 this 来引用图像对象本身。
重构代码和演示:http://jsfiddle.net/m1erickson/LLbFM/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Prototype</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.7.2.min.js"></script>
<style>
body{padding:20px;}
#container{
border:solid 1px #ccc;
margin-top: 10px;
width:350px;
height:350px;
}
</style>
<script>
$(function(){
var stage = new Kinetic.Stage({
container: 'container',
width: 350,
height: 350
});
var layer = new Kinetic.Layer();
stage.add(layer);
var img=new Image();img.onload=start;img.src="house16x16.png";
var arr = [];
var score_counter=0;
function start(){
for (var i = 0; i < 3; i++) {
var osix = new Kinetic.Image({
image: img,
x: i*20,
y: 30
});
layer.add(osix);
arr.push(osix); //works fine
}
layer.draw();
for(i in arr){
arr[i].on('click', function(){
this.remove();
layer.draw();
score_counter += 1;
if (score_counter >= 20) {finishing_fun();}
});
}
}
}); // end $(function(){});
</script>
</head>
<body>
<h4>Click image to remove it</h4>
<div id="container"></div>
</body>
</html>
关于javascript - 删除循环中的动态图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22054431/