How to fetch photos from Picasa album? - xcode

Question

I am developing an application which need to display photos from Picasa web album.
I have search about it. I got following links.
https://code.google.com/p/gdata-objectivec-client/
I have downloaded GData and also included all required folder into xcode.
The code which i have written is here.
- (void) loadPhotoGallery{
username = #"xyz";
password = #"abc";
GDataServiceGooglePhotos *photosService;
photosService = [self photoService];
NSURL *url = [GDataServiceGooglePhotos photoFeedURLForUserID:#"user" albumID:#"ablumID" albumName:nil photoID:nil kind:nil access:nil];
GDataQueryGooglePhotos *introspectQuery;
introspectQuery = [GDataQueryGooglePhotos photoQueryWithFeedURL:url];
[introspectQuery setResultFormat:kGDataQueryResultServiceDocument];
GDataServiceTicket *ticket;
ticket = [photosService fetchFeedWithQuery:introspectQuery delegate:self didFinishSelector:#selector(introspectTicket:finishedWithServiceDocument:error:)];
}
- (void)introspectTicket:(GDataServiceTicket *)ticket
finishedWithServiceDocument:(GDataAtomServiceDocument *)serviceDoc
error:(NSError *)error {
if (error == nil) {
GDataAtomCollection *collection = [[serviceDoc primaryWorkspace] primaryCollection];
NSArray *theMIMETypes = [collection serviceAcceptStrings];
}
}
-(GDataServiceGooglePhotos *)photoService{
static GDataServiceGooglePhotos *service = nil;
username = #"xyz";
password = #"abc";
if (!service) {
service = [[GDataServiceGooglePhotos alloc] init];
[service setShouldCacheDatedData:YES];
[service setServiceShouldFollowNextLinks:YES];
[service setIsServiceRetryEnabled:YES];
}
if ([username length] > 0 && [password length] > 0) {
[service setUserCredentialsWithUsername:username
password:password];
} else {
// fetch unauthenticated
[service setUserCredentialsWithUsername:nil
password:nil];
}
return service;
}
But i am very confused with this code.
Can anyone help. how to start code for fetching photos?
Thanks in advance.

Answer 1

I have resolve this. I have make two changes.
1. Edit loadPhotoGallery method
2. Create new method for fetching photos and displayed into grid.
My code for loadPhotoGallery is following.
- (void) loadPhotoGallery{
NSLog(#"fetchAllPhotos");
GDataServiceGooglePhotos *service = [self photoService];
GDataServiceTicket *ticket;
NSURL *feedURL = [GDataServiceGooglePhotos photoFeedURLForUserID:#"xyz#gmail.com" albumID:#"12345" albumName:nil photoID:nil kind:nil access:nil];
ticket = [service fetchFeedWithURL:feedURL delegate:self didFinishSelector:#selector(photosListTicket:finishedWithFeed:error:)];
feedURL = nil;
}
And code for displaying Photos into Grid is following.
-(void)displayGrid{
int x =0 ,y =0, counter =1;
for (int i=0; i<[self.photos count]; i++) {
GDataEntryPhoto *photoAlbum = [self.photos objectAtIndex:i];
GDataTextConstruct *textConstruct = [photoAlbum title];
NSString *stringTitle = [textConstruct stringValue];
NSLog(#"%#",stringTitle);
GDataMediaGroup *mediaGroup = [photoAlbum mediaGroup];
NSArray *arrMediaThumbs = [mediaGroup mediaThumbnails];
GDataMediaThumbnail *mediaThumbnail =[arrMediaThumbs objectAtIndex:2];
NSLog(#"%#", [mediaThumbnail URLString]);
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[mediaThumbnail URLString]]];
UIImage *img = [UIImage imageWithData:data];
UIImageView *imgView = [[UIImageView alloc] initWithImage:img];
imgView.frame = CGRectMake(x, y, 106, 106);
[scrPhoto addSubview:imgView];
UIButton *btn= [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = imgView.frame;
btn.tag = counter;
[btn addTarget:self action:#selector(btnPhotoClicked:) forControlEvents:UIControlEventTouchUpInside];
[scrPhoto addSubview:btn];
if(counter %3 == 0 ){
y = y +106;
x = 0;
} else{
x =x + 106;
}
counter++;
}
[scrPhoto setContentSize:CGSizeMake(320, y)];
}