iOS 5 Twitter Integration

[stephenmetts]

Hello all,

I have what is most likely a fairly newb question, but have searched and can't seem to find/learn the answer.

I'm tinkering with the iOS Twitter framework, and attempting to create a very simple app that will return the most recent tweet from a specific user account. I'm currently triggering this off a button tap.

The problem I have is the UILabel I'm displaying the text takes forever to load! I don't think it's twitter as I've logged the request and it's pretty fast. I can't seem to figure out what I'm doing wrong here. Could this have anything to do with the autorelease? Below is the relevant code. Any help would be much appreciated!!

- (IBAction)displayTweet:(id)sender {
    [activityIndicator startAnimating];
    [currentTweet setHidden:YES];
    [activityIndicator setHidden:NO];
    [processingLabel setHidden:NO];
    //  First, we create a dictionary to hold our request parameters
    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
    [params setObject:@"donslamm" forKey:@"screen_name"];
    [params setObject:@"1" forKey:@"count"];
    [params setObject:@"1" forKey:@"include_entities"];
    //[params setObject:@"1" forKey:@"include_rts"];
    
    //  Next, we create an URL that points to the target endpoint
    NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/user_timeline.json"];
    
    //  Now, we can create our request.  Note that we are performing a GET request
    TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:params requestMethod:TWRequestMethodGET];
    
    //  Finally, we perform our request
    [request performRequestWithHandler:
     ^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
         
         if (responseData != nil) {
             //  Here we leverage the NSJSONSerialization class to parse the returned JSON
             NSError *jsonError;
             NSArray *timeline = [NSJSONSerialization JSONObjectWithData:responseData 
                                                                 options:NSJSONReadingMutableLeaves 
                                                                   error:&jsonError];
             if (jsonError == nil) {
                 // We now have an object that we can parse
                 NSDictionary *dict = [timeline objectAtIndex:0];
                 NSString *string = [[NSString alloc] initWithString:[dict objectForKey:@"text"]];
                 self.currentTweet.text = [[NSString alloc] initWithString:string];
                 
             } else { 
                 // Inspect the contents of jsonError
                 NSLog(@"%@", jsonError);
             }
         }
         [activityIndicator stopAnimating];
         [activityIndicator setHidden:YES];
         [processingLabel setHidden:YES];
         [currentTweet setHidden:NO];
     }];
}

[mer10]

Could you be more specific with the time it takes?

[stephenmetts]

Roughly 30-45 seconds on average. I did a little more digging in the Apple iOS forums and it appears the Twitter framework has some serious memory leaks. I'm kind of at a loss on how to make this thing run faster though.

[MarkC]

Delete your self.currentTweet.text =... line, and create a new method:

-(void)doNewMethod:(NSString *)theString {
self.currentTweet.text = theString
}

Then, where your line was, insert:

[self performSelectorOnMainThread:@selector(doNewMethod) withObject:string waitUntilDone:NO];

Should work

[stephenmetts]

@MarcC

Thanks for the tip, and so fast! Unfortunately it didn't solve the time it takes to load the UILabel or map.... Below is what I implemented based on your suggestion (ignore the map stuff, again just tinkering around). Interestingly enough, I put the same code in viewDidLoad and it comes up lightning fast. It seems localized to the IBAction somehow. Any thoughts, suggestions?

-(void)setTweet:(NSString *)theTweet {
    self.currentTweet.text = theTweet;
}

-(IBAction)displayTweet:(id)sender {
    [activityIndicator startAnimating];
    [currentTweet setHidden:YES];
    [mapView setHidden:YES];
    [activityIndicator setHidden:NO];
    [processingLabel setHidden:NO];
    //  First, we create a dictionary to hold our request parameters
    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
    [params setObject:@"donslamm" forKey:@"screen_name"];
    [params setObject:@"1" forKey:@"count"];
    [params setObject:@"1" forKey:@"include_entities"];
    //[params setObject:@"1" forKey:@"include_rts"];
    
    //  Next, we create an URL that points to the target endpoint
    NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/user_timeline.json"];
    
    //  Now, we can create our request.  Note that we are performing a GET request
    TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:params requestMethod:TWRequestMethodGET];
    
    //  Finally, we perform our request
    [request performRequestWithHandler:
     ^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
         
         if (responseData != nil) {
             //  Here we leverage the NSJSONSerialization class to parse the returned JSON
             NSError *jsonError;
             NSArray *timeline = [NSJSONSerialization JSONObjectWithData:responseData 
                                                                 options:NSJSONReadingMutableLeaves 
                                                                   error:&jsonError];
             if (jsonError == nil) {
                 // We now have an object that we can parse
                 NSDictionary *dict = [timeline objectAtIndex:0];
                 NSString *string = [[NSString alloc] initWithString:[dict objectForKey:@"text"]];
                 [self performSelectorOnMainThread:@selector(setTweet:) withObject:string waitUntilDone:NO];
                 
                 NSArray *hashArray = [[NSArray alloc] initWithObjects:[dict objectForKey:@"entities"], nil];
                 NSDictionary *hashDict = [hashArray objectAtIndex:0];
                 NSArray *hashArray2 = [[NSArray alloc] initWithObjects:[hashDict objectForKey:@"hashtags"], nil];
                 NSArray *hashArray3 = [[NSArray alloc] initWithArray:[hashArray2 objectAtIndex:0]];
                 NSDictionary *hashDict2 = [hashArray3 objectAtIndex:0];
                 
                 if ([[hashDict2 objectForKey:@"text"] isEqualToString:@"ATX"]) {
                     NSArray *keys = [NSArray arrayWithObjects: @"lat", @"lng", nil];
                     NSArray *objects = [NSArray arrayWithObjects:@"30.2669444", @"-97.7427778", nil];
                     
                     NSDictionary *location = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
                     
                     CLLocationCoordinate2D coord = {.latitude =  [[location objectForKey:@"lat"] doubleValue], .longitude =  [[location objectForKey:@"lng"] doubleValue]};
                     MKCoordinateSpan span = {.latitudeDelta =  0.2, .longitudeDelta =  0.2};
                     MKCoordinateRegion region = {coord, span};
                     
                     [mapView setRegion:region];
                     
                     CLLocationCoordinate2D annotationCoord;
                     
                     annotationCoord.latitude = [[location objectForKey:@"lat"] doubleValue];
                     annotationCoord.longitude = [[location objectForKey:@"lng"] doubleValue];
                     
                     MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
                     annotationPoint.coordinate = annotationCoord;
                     annotationPoint.title = @"Austin";
                     annotationPoint.subtitle = @"Austin Texas";
                     [mapView addAnnotation:annotationPoint];
                 }
                 
             } else { 
                 // Inspect the contents of jsonError
                 NSLog(@"%@", jsonError);
             }
         }
         [activityIndicator stopAnimating];
         [activityIndicator setHidden:YES];
         [processingLabel setHidden:YES];
         [currentTweet setHidden:NO];
         [mapView setHidden:NO];
     }];

}