iOS download and save HTML file

Question

I am trying to download a webpage (html) then display the local html that has been download in a UIWebView.

This is what I have tried -

NSString *stringURL = @"url to file"; NSURL *url = [NSURL URLWithString:stringURL]; NSData *urlData = [NSData dataWithContentsOfURL:url]; if ( urlData ) { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,@"index.html"]; [urlData writeToFile:filePath atomically:YES]; } //Load the request in the UIWebView. [web loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"]isDirectory:NO]]]; // Do any additional setup after loading the view from its nib.

But this gives a 'SIGABRT' error.

Not too sure what I have done wrong?

Any help would be appreciated. Thanks!

Look at the debugger output. There's probably a message.

zneak
– zneak

2011-04-09 18:19:29 +00:00
Commented Apr 9, 2011 at 18:19 — zneak
– zneak, Commented Apr 9, 2011 at 18:19

Anne · Accepted Answer · 2011-04-09 19:07:48Z

The path passed to the UIWebView is incorrect, like Freerunnering mentioned, try this instead:

// Determile cache file path NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *filePath = [NSString stringWithFormat:@"%@/%@", [paths objectAtIndex:0],@"index.html"]; // Download and write to file NSURL *url = [NSURL URLWithString:@"http://www.google.nl"]; NSData *urlData = [NSData dataWithContentsOfURL:url]; [urlData writeToFile:filePath atomically:YES]; // Load file in UIWebView [web loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:filePath]]];

Note: Correct error-handling needs to be added.

in your case, it's impossible to download included resources like images

Keab42 · Accepted Answer · 2012-03-22 11:24:12Z

NSDocumentDirectory will be backed up to iCloud. You might be better off using NSCachesDirectory https://developer.apple.com/library/ios/#qa/qa1719/_index.html

Kyle Howells · Accepted Answer · 2011-04-09 18:53:01Z

Your app is a folder with a .app extension on the end. On the iPhone once it is installed you can't change this folder, hence why you save it to the documents directory.

In your example code you save the file to Documents/index.html and ask it to load appname.app/index.html.

[NSBundle mainBundle] doesn't give you the documents directory it gives you (i think) the .app folder (though it might be the folder that contains the app, documents, and other folders).

To give you'll want to change this line.

[web loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"]isDirectory:NO]]];

To (providing this is the same method as the rest of the code, else recreate the object 'filePath')

[web loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:filePath isDirectory:NO]]];

code4latte · Accepted Answer · 2016-06-27 16:43:48Z

Here is the Swift 2.x version:

 var paths: [AnyObject] = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) var filePath: String = "\(paths[0])/\("index.html")" // Download and write to file var url: NSURL = NSURL(string: "http://www.google.nl")! var urlData: NSData = NSData.dataWithContentsOfURL(url) urlData.writeToFile(filePath, atomically: true) // Load file in UIWebView web.loadRequest(NSURLRequest(URL: NSURL.fileURLWithPath(filePath)))

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