iOS应用程序下载flickr照片

Question

我正在开发一个学校的应用程序。他们将照片保存在flickr上。他们希望在他们的应用中添加照片库页面，以便从他们的flickr页面中提取照片。我想知道从flickr下载照片的最简单方法是什么： 1.我不想上传任何照片。 2.我不希望用户必须登录。 3.我无法提供个别照片的URL，因为学校可能会更新他们的flickr的频率比我更新应用程序的频率更高。我只是想让应用将他们的相册中的所有照片都拉出来。

非常感谢， 卢克

Answer 1

下载ObjectiveFlickr，有一个样品 “RandomPublicPhoto” 在examples文件夹

Answer 2

试试这个代码

-(void)getUserID{ 

    NSString *methodName = @"flickr.people.findByUsername"; 

    NSString *userName = @"<Your_Username>"; 

    NSString *urlString = [NSString stringWithFormat:@"%@?method=%@&api_key=%@",kFlickrAPIURL,methodName,kFlickrAPIKey]; 
urlString = [NSString stringWithFormat:@"%@&username=%@&format=%@&nojsoncallback=1", urlString,userName,kFlickrResponseFormat]; 

    NSURL *url = [NSURL URLWithString:urlString]; 

    userIDRequest = [[NSURLRequest alloc] initWithURL: url]; 
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:userIDRequest delegate:self]; 
    [connection release]; 
} 

-(void)getUserPhotos:(NSString *)userID{ 

    NSString *methodName = @"flickr.people.getPhotos"; 

    NSString *urlString = [NSString stringWithFormat:@"%@?method=%@&key=%@",kFlickrAPIURL,methodName,kFlickrAPIKey];  

    urlString = [NSString stringWithFormat:@"%@&user_id=%@&format=%@&nojsoncallback=1",urlString,userID,kFlickrResponseFormat]; 

    NSURL *url = [NSURL URLWithString:urlString]; 

    imagesRequest = [[NSURLRequest alloc] initWithURL: url]; 
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:imagesRequest delegate:self]; 
    [connection release]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 
    NSError *error = nil; 

    NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&error]; 
    if (userIDRequest == connection.originalRequest) 
    { 
     NSString *userId = [[jsonDic objectForKey:@"user"] objectForKey:@"id"]; 
     if (userId != nil) 
      [self getUserPhotos:userId]; 
    } else if (imagesRequest == connection.originalRequest) { 

     NSArray *photos = [[jsonDic objectForKey:@"photos"] objectForKey:@"photo"]; 

     for (NSDictionary *photo in photos) 
     { 
      // Get title of the image 
      NSString *title = [photo objectForKey:@"title"]; 

      // Build the URL to where the image is stored (see the Flickr API) 
      // In the format http://farmX.static.flickr.com/server/id/secret 
      // Notice the "_s" which requests a "small" image 75 x 75 pixels 
      NSString *photoURLString = [NSString stringWithFormat:@"http://farm%@.static.flickr.com", [photo objectForKey:@"farm"]]; 
      photoURLString = [NSString stringWithFormat:@"%@/%@/%@_%@_s.jpg", photoURLString, [photo objectForKey:@"server"], [photo objectForKey:@"id"], [photo objectForKey:@"secret"]]; 

     } 
    } 

    }