问题描述
基本上,我正在尝试将图像保存到 localStorage
中,然后在下一页上加载相同的图像。
So basically, I am trying to save an image into localStorage
, and then load that same image on the next page.
我遇到了这个很好的例子:
I came across this great example: http://jsfiddle.net/8V9w6/
虽然,我完全不知道这是如何工作的,因为我只使用localStorage作为极小字符串。
Although, I have absolutely no idea how this works since I have only ever used localStorage for extremely small strings.
我有一个图像通过jQuery处理的文件上传来改变
I have an image that gets changed via a file upload handled by jQuery
<img id="bannerImg" src="images/image-placeholder.jpg" alt="Banner Image" style="display:none;" width="100%" height="200px" />
我在上面添加的 jsfiddle
链接允许多个文件上传,这绝对是我不想要的。
The jsfiddle
link I added above allows multiple file upload, and that is definitely something I would not like to have.
我需要知道的是我应该在第一页上放置什么来保存图像,我应该在第二页上加载图像?
What I need to know is what should I be placing on the first page to save the image, and what should I be placing on the second page to load the image?
我有保存
按钮处理所有事情。
I have a save
button that will be processing everything.
推荐答案
这样的事情?
var img = new Image();
img.src = 'mypicture.png';
img.load = function() {
var canvas = document.createElement('canvas');
document.body.appendChild(canvas);
var context = canvas.getContext('2d');
context.drawImage(img, 0, 0);
var data = context.getImageData(x, y, img.width, img.height).data;
localStorage.setItem('image', data); // save image data
};
获取第二页上的localStorage;尝试这样的事情:
Get the localStorage on the second page; try something like this:
window.onload = function() {
var picture = localStorage.getItem('image');
var image = document.createElement('img');
image.src = picture;
document.body.appendChild(image);
};
这篇关于保存并从localStorage加载图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!