Re: Using an anchor in NSURL file url

[diederik]

Would it be possible to parse the anchor out from the url and then once
the page is completely loaded in the webview use javascript's
window.location to jump to the anchor's location within the page. I know
that can work for UIWebView, not 100% sure for WKWebView.




> On Jan 21, 2016, at 7:17 PM, Jeff Evans  wrote:
>>
>> Colleagues,
>>
>>  In OSX I'm using an NSURLRequest to load a file url in WKWebView. Works
>> fine unless I try to add an anchor to the path, for example,
>>
>> [path]/filename.html#anchorname
>
> The most correct way would be to use NSURLComponents to append the
> fragment:
>
> NSURL* fileURL = [NSURL fileURLWithPath:somePathString]; // or, even
> better, an API that gives file URLs directly, skipping the path string
> NSURLComponents* components = [NSURLComponents componentsWithURL:fileURL
> resolvingAgainstBaseURL:YES];
> components.fragment = @"anchorname";
> NSURL* urlWithFragment = components.URL;
>
>
> If you can't use NSURLComponents because you're targeting releases of OS X
> before 10.9, you should just use string operations:
>
> NSURL* fileURL = // … as above …
> NSString* urlString = fileURL.absoluteString;
> urlString = [urlString stringByAppending:@"#anchorname"];
> NSURL* urlWithFragment = [NSURL URLWithString:urlString];
>
> Regards,
> Ken
>
>
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Re: Using an anchor in NSURL file url

[Jens Alfke]

> On Jan 21, 2016, at 6:23 PM, Jeff Evans  wrote:
> 
>   //The full url appears to have the anchor prepended, plus a couple of 
> dashes:

> 
>   #page3-- [pathtobook is here]/book/chapter1.html

The .description property of a URL assembled with -relativeToURL is weird 
looking like that, but it’s not the actual URL. To see the actual URL, use the 
.absoluteString property instead. Or convert the URL to an absolute URL by 
getting its .absoluteURL property.

—Jens
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Re: Using an anchor in NSURL file url

[Jeff Evans]

Thanks - 
Here's what I'm doing: Assume a directory called book and a file called 
chapter1, and an anchor called #page3

NSString *filePath = [[NSBundle mainBundle] pathForResource: chapter1 
ofType: @"html" inDirectory: book];

//That file path gets converted to a base url:

NSURL *baseURL =  [NSURL fileURLWithPath:filePath];

//I then create a combined url that includes the anchor, following a 
suggestion I saw elsewhere:

NSURL *fullURL  = [NSURL URLWithString: #page3 relativeToURL:baseURL];

//Then I create a url request with that:

NSURLRequest *nsrequest = [NSURLRequest requestWithURL: fullURL];

//And pass it to the WKWebView:

[webView loadRequest:nsrequest];

//Which loads the chapter file very nicely, but ignoring the anchor.

//The full url appears to have the anchor prepended, plus a couple of 
dashes:

#page3-- [pathtobook is here]/book/chapter1.html

//Instead of what I'd expect,

[pathtobook is here]/book/chapter1.html#page3

So I don't quite understand that format. I expect I'm missing something 
basic here. The chapter does contain the anchor  page 3> 

Yours, Jeff

On Jan 21, 2016, at 5:32 PM, Quincey Morris wrote:

On Jan 21, 2016, at 17:17 , Jeff Evans  wrote:
> 
>   In OSX I'm using an NSURLRequest to load a file url in WKWebView. Works 
> fine unless I try to add an anchor to the path, for example,
> 
> [path]/filename.html#anchorname
> 
> The problem appears to be that the # gets escaped to %23. 

Can you show what APIs you’re using for this? Are you appending the anchor to 
an existing string or URL? Are you explicitly creating a file URL, or a generic 
URL? 

Looking at NSURL documentation, it looks like NSURL recognizes the anchor as a 
piece called “fragment”.

> I tried [NSURL URLWithString: anchorname relativeToURL: baseURL] but this 
> produces a url with the form 

This doesn’t seem likely to work. In this API, the first parameter is assumed 
to *be* a URL, albeit in relative form, not a URL piece, which is what you have.


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Re: Using an anchor in NSURL file url

[Ken Thomases]

On Jan 21, 2016, at 7:17 PM, Jeff Evans  wrote:
> 
> Colleagues,
> 
>   In OSX I'm using an NSURLRequest to load a file url in WKWebView. Works 
> fine unless I try to add an anchor to the path, for example,
> 
> [path]/filename.html#anchorname

The most correct way would be to use NSURLComponents to append the fragment:

NSURL* fileURL = [NSURL fileURLWithPath:somePathString]; // or, even better, an 
API that gives file URLs directly, skipping the path string
NSURLComponents* components = [NSURLComponents componentsWithURL:fileURL 
resolvingAgainstBaseURL:YES];
components.fragment = @"anchorname";
NSURL* urlWithFragment = components.URL;


If you can't use NSURLComponents because you're targeting releases of OS X 
before 10.9, you should just use string operations:

NSURL* fileURL = // … as above …
NSString* urlString = fileURL.absoluteString;
urlString = [urlString stringByAppending:@"#anchorname"];
NSURL* urlWithFragment = [NSURL URLWithString:urlString];

Regards,
Ken


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Using an anchor in NSURL file url

[Jeff Evans]

Colleagues,

In OSX I'm using an NSURLRequest to load a file url in WKWebView. Works 
fine unless I try to add an anchor to the path, for example,

[path]/filename.html#anchorname

The problem appears to be that the # gets escaped to %23. 

I tried [NSURL URLWithString: anchorname relativeToURL: baseURL] but this 
produces a url with the form 

#anchorname--[path]/filename.html

and that doesn't work (opens the file, but ignores the anchor).

Is there any way to use an anchor in a file url for WKWebView?

Thanks, Jeff



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Re: Using an anchor in NSURL file url

[Quincey Morris]

On Jan 21, 2016, at 17:17 , Jeff Evans  wrote:
> 
>   In OSX I'm using an NSURLRequest to load a file url in WKWebView. Works 
> fine unless I try to add an anchor to the path, for example,
> 
> [path]/filename.html#anchorname
> 
> The problem appears to be that the # gets escaped to %23. 

Can you show what APIs you’re using for this? Are you appending the anchor to 
an existing string or URL? Are you explicitly creating a file URL, or a generic 
URL? 

Looking at NSURL documentation, it looks like NSURL recognizes the anchor as a 
piece called “fragment”.

> I tried [NSURL URLWithString: anchorname relativeToURL: baseURL] but this 
> produces a url with the form 

This doesn’t seem likely to work. In this API, the first parameter is assumed 
to *be* a URL, albeit in relative form, not a URL piece, which is what you have.

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