Re: NSSharingService with Animated GIFs?

[Charles Carver]

Ken,

Thanks for the response. NSImage never ended up working, but your suggestion of 
attaching the local URL worked:

NSString *fileUrl = @"http://i.imgur.com/V8w9fKt.gif";;
NSString *fileName = [fileUrl lastPathComponent];
NSURL *saveUrl = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@", 
NSTemporaryDirectory()]];
saveUrl = [saveUrl URLByAppendingPathComponent:fileName];
// Write image to temporary directory
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileUrl]];
[data writeToURL:saveUrl atomically:YES];
        
// Attach the raw NSURL pointing to the local file
NSArray *shareItems = [NSArray arrayWithObjects:saveUrl, @"Text", nil];

// Open share prompt
NSSharingService *service = [NSSharingService 
sharingServiceNamed:NSSharingServiceNameComposeMessage];
service.delegate = self;
[service performWithItems:shareItems];
        
I then implemented didShareItems and didFailToShareItems so that I could remove 
the file after sharing was complete:

- (void)sharingService:(NSSharingService *)sharingService 
didShareItems:(NSArray *)items{
        NSString *path = items[0];
        [self removeFile:path];
}

...

- (void)removeFile:(NSString *)path{
        [[NSFileManager defaultManager] removeItemAtPath:path error:NULL];
}

And for those struggling, I found the following method was required for 
everything to work properly:

- (NSWindow *)sharingService:(NSSharingService *)sharingService 
sourceWindowForShareItems:(NSArray *)items 
sharingContentScope:(NSSharingContentScope *)sharingContentScope{
    return self.window;
}

I’m not sure if this is the best/most elegant way to accomplish this, so any 
further suggestions would be appreciated.

Thank you for your help once again,

Charles Carver

On May 16, 2014, at 9:51 PM, Ken Thomases wrote:

> On May 16, 2014, at 10:26 AM, Charles Carver wrote:
> 
>>> I'm pretty new to Objective-C, but have been mostly understanding 
>>> everything so far. I am stuck, however, on trying to share an animated GIF 
>>> through NSSharingService.
>>> 
>>> I am attaching the image like so, where “image" is a string containing the 
>>> URL of an animated GIF (http://i.imgur.com/V8w9fKt.gif, for example):
>>> 
>>> NSImage *imageData = [[NSImage alloc] initWithContentsOfURL:[NSURL 
>>> URLWithString:image]];
>>> NSArray *shareItems = [NSArray arrayWithObjects:imageData, @“Text", nil];
>>> NSSharingService *service = [NSSharingService 
>>> sharingServiceNamed:NSSharingServiceNameComposeMessage];
>>> service.delegate = self;
>>> [service performWithItems:shareItems];
>>> 
>>> When the code is run and the message is sent, however, the image gets sent 
>>> as a PNG file instead of a GIF.
> 
> Instead of putting an NSImage into the list, try creating an NSPasteboardItem 
> and setting its data to be the image data and its type to kUTTypeGIF:
> 
>    NSData* data = [NSData dataWithContentsOfURL:[NSURL URLWithString:image]];
>    NSPasteboardItem* item = [[NSPasteboardItem alloc] init];
>    [item setData:data forType:(__bridge NSString*)kUTTypeGIF];
>    NSArray *shareItems = [NSArray arrayWithObjects:item, @“Text", nil];
>    …
> 
> It may still end up as a PNG because the pasteboard server will translate 
> from any known image type to the most common interchange formats, and the 
> receiving end gets to pick its preferred type.
> 
> If that still doesn't work, you can try putting either the original URL into 
> the shareItems array or the file URL from a locally-saved file.
> 
> Regards,
> Ken
> 

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