How to refer a local image file from UIWebView's HTML on iPhone?

问题

I would like to use <img src="temp.jpg" /> in my UIWebView's HTML.
How can I refer to a local file named temp.jpg to save precious loading time?

Of course the obvious choice would be <img src=".\temp.jpg" /> but I have no idea where my root is...

回答1:

NSURL *url=[[NSBundle mainBundle] bundleURL];
[webView loadHTMLString:string baseURL:url];

This let's the root be the app's main bundle.

回答2:

This will create a URL object that contains the location of your file on disk. You can then use this to output a valid file:// URL string that can be used within img tags.

NSURL* fileURL = [[NSBundle mainBundle] URLForResource:@"temp" withExtension:@"jpg"];

NSLog(@"<img src=\"%@\" />", fileURL.absoluteString);

回答3:

i was searching alot as olution and i find this solution working for me in my case i have an local html string and a local image i convert the image into base 64 you may use this website to convert image to base64 encoding

http://www.dailycoding.com/Utils/Converter/ImageToBase64.aspx

and rewrite the html string to have the base64 image in the image tag like the following

    <img src="data:image/png;base64,
iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGP
C/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IA
AAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1J
REFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jq
ch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0
vr4MkhoXe0rZigAAAABJRU5ErkJggg==" alt="Red dot" >

hope is will help for other or maybe get a better solution, best of luck

回答4:

I have no idea where my root is...

UIWebView looks up files relative to the HTML file you loaded in it. So perhaps it will be your app bundle.

来源：https://stackoverflow.com/questions/14739179/how-to-refer-a-local-image-file-from-uiwebviews-html-on-iphone

标签

ios

uiwebview