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iOS Displaying API Data with Collection Views in Objective-C Show Me the Data - API’s, OAuth, and NSURLSession Queues and User Interface

Posted by Jacob Carroll
Jacob Carroll
5,957 Points

Code Challenge: Queues and User Interface. HELP!

Can someone help me with how to set up this code?

AwesomeViewController.m 
#import AwesomeViewController

@implementation AwesomeViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURL *url = [NSURL URLWithString:@"http://blog.teamtreehouse.com/wp-content/themes/treehouse/images/logo-blog2x.png"];

    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
    NSURLSession *session = [NSURLSession sharedSession];

    NSURLSessionDownloadTask *task = [session downloadTaskWithRequest:request 
                                                    completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
        NSData *data = [[NSData alloc] initWithContentsOfURL:location];
        UIImage *image = [[UIImage alloc] initWithData:data];

        dispatch_async(dispatch_get_main_queue(), ^{
        self.imageView.image = image;
    }];

    [task resume];
}

@end

1 Answer

Max Ramirez
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Max Ramirez
iOS Development Techdegree Graduate 17,361 Points
Max Ramirez
.a{fill-rule:evenodd;}techdegree seal-36
Max Ramirez
iOS Development Techdegree Graduate 17,361 Points

Hey Jacob I actually just figured this one out myself, You were only missing one small detail.

dispatch_async(dispatch_get_main_queue(), ^{ self.imageView.image = image; });

just the ending parenthesis after the curly bracket :) You had a square bracket instead by the looks of it.