Photo Stream

sharedPhotoStream.m

// In your view controller
// Make sure you have a class that stores image metadata
// For example, you could have your MyMetadata class with
// the following iVars:
// name -- The name of the image
// size -- The expected size of the image
// date -- The time the picture was taken
// location -- The place the image was taken
// peopleInPhoto -- An array of the 'id' attribute from KCSUsers
//                  in the picture
//
// When your imagePickerController:didFinishPickingMediaWithInfo: delegate
// gets called you should update the items in your metadata object.


// To save the current photo
- (void)sharePhoto: (UIImage *)image
      withMetadata: (MyMetadata *)metadata
{
    [KCSResourceService saveData:UIImagePNGRepresentation(image)
                      toResource:metadata.name
                    withDelegate:self];
}


// In your resource delegate
// This makes 
- (void)resourceServiceDidCompleteWithResult:(KCSResourceResponse *)result
{
    KCSCollection *metadataCollection = [[KCSClient sharedClient] collectionFromString:@"metadata" 
                                                                             withClass:[MyMetadata class]];
    for (MyMetadata *metadata in self.imageMetadata){
        if ([metadata.name isEqualToString:result.resourceId]){
            [metadata saveToCollection:metadataCollection withDelegate:self];
        } 
    }
}


// Later... when you want to actually display these images...
// perform a query against your metadata collection
// maybe to find a user or images within a certain Geo Area
// (see: http://docs.kinvey.com/ios-developers-guide.html#querying_data or
// http://docs.kinvey.com/ios-developers-guide.html#geoqueries for details)
// and in your delegate:

- (void)collection:(KCSCollection *)collection didCompleteWithResult:(NSArray *)result
{
    // Get a path to the image cache
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *dataPath = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"imageCache"];

    // Loop through the returned metadata
    for (MyMetadata *metadata in result){
        // Download each photo to a local copy, your delegate method should
        // handle the display logic
        [KCSResourceService downloadResource:metadata.name
	                              toFile:[dataPath stringByAppendingPathComponent: metadata.name]
	                withResourceDelegate:self];
    }
}