Using HTML and Local Images Within Uiwebview

Load local images in a local HTML file within a UIWebView

The problem is,

Your app can't figure out the where your resources are, and where your html is.

Why? Because your html and resources are added in bundle, which is scattered. You need to put all in single folder, so that your resources are accessible. According to your code

<img src="../media/sjolyst.jpg" alt="Sjølyst"/>

You are trying to fetch the image relatively, but in actual folder structure there is no ../media.

Solution simple.

1. Delete all your html thing, I guess the folder.
2. Re-add the HTML folder, see image
   

3. You should see a folder like image below

   

You are now good to go.

By adding a folder mentioned in 2. creates a folder in bundle path, and put all the resource with correct folder structure inside it.

Hope this helps.

Cheers.

Using HTML and Local Images Within UIWebView

Using relative paths or file: paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the view with the correct baseURL:

NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webView loadHTMLString:htmlString baseURL:baseURL];

You can then refer to your images like this:

<img src="myimage.png">

(from uiwebview revisited)

Loading external image in local HTML inside UIWebView

I don't really understand what you are trying to do, but if you want to show an image from a URL you can do that easily with a UIImageView like this:

imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:
[NSURL URLWithString:@"http://www.stackoverflow.com/image.jpg"]]];

Or if you want a UIWebView you could do a separate HTML file and load it like this:

NSString *path = [[NSBundle mainBundle] pathForResource:@"myFile" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
[webView setScalesPageToFit:YES];

Or you can test to add tags like html, body etc.

I'm open for more info about your problem.

iOS WebView remote html with local image files

Ok here is an example how to subclass NSURLProtocol and deliver an image (image1.png) which is already in the bundle. Below is the subclasses' header, the implementation as well as an example how to use it in a viewController(incomplete code) and a local html file(which can be easily exchanged with a remote one). I've called the custom protocol: myapp:// as you can see in the html file at the bottom.

And thanks for the question! I was asking this myself for quite a long time, the time it took to figure this out was worth every second.

EDIT:
If someone has difficulties making my code run under the current iOS version, please have a look at the answer from sjs. When I answered the question it was working though. He's pointing out some helpful additions and corrected some issues, so give props to him as well.

This is how it looks in my simulator:

MyCustomURLProtocol.h

@interface MyCustomURLProtocol : NSURLProtocol
{
    NSURLRequest *request;
}

@property (nonatomic, retain) NSURLRequest *request;

@end

MyCustomURLProtocol.m

#import "MyCustomURLProtocol.h"

@implementation MyCustomURLProtocol

@synthesize request;

+ (BOOL)canInitWithRequest:(NSURLRequest*)theRequest
{
    if ([theRequest.URL.scheme caseInsensitiveCompare:@"myapp"] == NSOrderedSame) {
        return YES;
    }
    return NO;
}

+ (NSURLRequest*)canonicalRequestForRequest:(NSURLRequest*)theRequest
{
    return theRequest;
}

- (void)startLoading
{
    NSLog(@"%@", request.URL);
    NSURLResponse *response = [[NSURLResponse alloc] initWithURL:[request URL] 
                                                        MIMEType:@"image/png" 
                                           expectedContentLength:-1 
                                                textEncodingName:nil];

    NSString *imagePath = [[NSBundle mainBundle] pathForResource:@"image1" ofType:@"png"];  
    NSData *data = [NSData dataWithContentsOfFile:imagePath];

    [[self client] URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
    [[self client] URLProtocol:self didLoadData:data];
    [[self client] URLProtocolDidFinishLoading:self];
    [response release];
}

- (void)stopLoading
{
    NSLog(@"something went wrong!");
}

@end

MyCustomProtocolViewController.h

@interface MyCustomProtocolViewController : UIViewController {
    UIWebView *webView;
}

@property (nonatomic, retain) UIWebView *webView;

@end

MyCustomProtocolViewController.m

...

@implementation MyCustomProtocolViewController

@synthesize webView;

- (void)awakeFromNib
{
    self.webView = [[[UIWebView alloc] initWithFrame:CGRectMake(20, 20, 280, 420)] autorelease];
    [self.view addSubview:webView];
}

- (void)viewDidLoad
{   
    // ----> IMPORTANT!!! :) <----
    [NSURLProtocol registerClass:[MyCustomURLProtocol class]];

    NSString * localHtmlFilePath = [[NSBundle mainBundle] pathForResource:@"file" ofType:@"html"];

    NSString * localHtmlFileURL = [NSString stringWithFormat:@"file://%@", localHtmlFilePath];

    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:localHtmlFileURL]]];

    NSString *html = [NSString stringWithContentsOfFile:localHtmlFilePath encoding:NSUTF8StringEncoding error:nil]; 

    [webView loadHTMLString:html baseURL:nil];
}

file.html

<html>
<body>
    <h1>we are loading a custom protocol</h1>
    <b>image?</b><br/>
    <img src="myapp://image1.png" />
<body>
</html>

Load image in local HTML file -- UIWebView

Instead of loading with an NSURLRequest, read the html file into an NSString and create an NSURL to the directory with image files.

Then use UIWebView's - (void)loadHTMLString:(NSString *)string baseURL:(NSURL *)baseURL method.

So, you'd have something like...

NSURL *url = [[NSBundle mainBundle] URLForResource:@"index" withExtension:@"html"];
NSString *html = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

[webView loadHTMLString:html baseURL:[url URLByDeletingLastPathComponent]];

How to load images with HTML file in UIWebView

HTML File:

<HTML>
<HEAD>
<TITLE>My Web Page</TITLE>
</HEAD>
<BODY>
<img alt="Sample Image" src="1.jpg" style="width: 100px; height: 100px;"/>
<P>This is where you will enter all the text and images you want displayed in a browser window.</P>
</BODY>
</HTML>

webView code:

 NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"desk" ofType:@"html"];
 NSURL *url=[NSURL fileURLWithPath:htmlFile];
 NSURLRequest *request=[NSURLRequest requestWithURL:url];
 [_webView loadRequest:request];

screenshot:

UIWebView with local HTML file not showing image

Have you checked the URL? It might be a relative one (e.g. '/img/foo.jpg').

You can add a base URL to your webview in that case:

NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webView loadHTMLString:htmlString baseURL:baseURL];

Loading a local image directly into a UIWebView without HTML?

UIWebView has a loadData:MIMEType:textEncodingName:baseURL: method. Rather than writing HTML with the image in it, you could do something simpler like this

NSData *imageData = [NSData dataWithContentsOfURL:fileURL];
[self.webView loadData:imageData MIMEType:@"image/..." textEncodingName:@"utf-8" baseURL:nil];

the MIMEType argument should be changed to whatever MIME type the image is. (e.g. jpeg is image/jpeg)

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