Re: NSSharingService with Animated GIFs?
Re: NSSharingService with Animated GIFs?
- Subject: Re: NSSharingService with Animated GIFs?
- From: Ken Thomases <email@hidden>
- Date: Sat, 17 May 2014 01:03:20 -0500
On May 17, 2014, at 12:41 AM, Charles Carver wrote:
> Thanks for the response. NSImage never ended up working, but your suggestion of attaching the local URL worked:
I'm glad you got something working, but…
> NSString *fileUrl = @"http://i.imgur.com/V8w9fKt.gif";;
Probably best to not name things which aren't NSURLs as "url". At least, call it a "URL string", perhaps "fileURLString" or, since it's the source of an image, "imageURLString".
> NSString *fileName = [fileUrl lastPathComponent];
It is not legal to use -[NSString lastPathComponent] on a string which is not a file path. The docs even call this out:
"Note that this method only works with file paths (not, for example, string representations of URLs)."
> NSURL *saveUrl = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@", NSTemporaryDirectory()]];
It's not correct to try to construct a file URL by prepending "file://" to a path string. Paths can have characters which are not valid in URLs. The following is correct and simpler as well:
NSURL * saveUrl = [NSURL fileURLWithPath:NSTemporaryDirectory()];
> saveUrl = [saveUrl URLByAppendingPathComponent:fileName];
> // Write image to temporary directory
> NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileUrl]];
You should consider what happens if the server is slow to respond. The above call will block until the image download is complete. Better to use the asynchronous URL loading mechanisms in the frameworks (e.g. NSURLSession).
Regards,
Ken
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