Databases
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PO
 

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    <p>To give a more detailed example:</p> <p>in your .h file do</p> <pre><code>@interface YourClass : YourSuperclass&lt;NSURLConnectionDataDelegate&gt; </code></pre> <p>in your .m file do</p> <pre><code>@property (nonatomic) NSMutableData *imageData; @property (nonatomic) NSUInteger totalBytes; @property (nonatomic) NSUInteger receivedBytes; </code></pre> <p>And somewhere call</p> <pre><code>NSURL *url = [NSURL URLWithString:@"http://i0.kym-cdn.com/entries/icons/original/000/005/545/OpoQQ.jpg?1302279173"]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES]; </code></pre> <p>And also implement the delegate methods</p> <pre><code>- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) urlResponse; NSDictionary *dict = httpResponse.allHeaderFields; NSString *lengthString = [dict valueForKey:@"Content-Length"]; NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; NSNumber *length = [formatter numberFromString:lengthString]; self.totalBytes = length.unsignedIntegerValue; self.imageData = [[NSMutableData alloc] initWithCapacity:self.totalBytes]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [self.imageData appendData:data]; self.receivedBytes += data.length; // Actual progress is self.receivedBytes / self.totalBytes } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { imageView.image = [UIImage imageWithData:self.imageData]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { //handle error } </code></pre>
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    1. POSet progress bar for downloading NSData
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    1. COYou're not using the correct method here. You should be using the NSURLConnectionDownloadDelegate to report progress. That is what it's for. See my Gist.
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    2. COI extracted this from working code.. I guess these are the correct methods.
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    3. COI suppose you could use that method. The "correct" way is to use the download delegate.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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