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copied!<p>you never download imageData. you assign it the request object . thats why you get the warning too. a NSURLConnection object is not a NSData object: <code>NSData *imgData = [[NSURLConnection alloc] initWithRequest:imageRequest delegate:self]; //"Incompatible pointer types initializing ..." warning here</code></p> <p>I would today rewrite it using the startAsyncConnection method. sec</p> <p>-- there you go, untested and written in text edit but it should get you started (I reused most of your code but cut it down a lot too)</p> <pre><code>#import "RootViewController.h" @interface RootViewController () @property(assign) IBOutlet UIScrollView *mainScroll; @end @implementation RootViewController - (void)viewDidLoad { [super viewDidLoad]; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [self getJSONAndImageData]; } - (void)getJSONAndImageData { NSURL *url = [NSURL URLWithString:@"http://My server goes here/json.php"]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse*r, NSData*d, NSError*e) { [self parseJSONAndGetImages:d]; }]; } - (void)parseJSONAndGetImages:(NSData*)data { NSMutableArray *urlArray = [[NSMutableArray alloc] init]; //This is where all the JSON Parsing is being done. //Turn off the data indicator, because the download is complete. [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; NSArray *jsonArray = (NSArray*)[NSJSONSerialization JSONObjectWithData:data options:nil error:nil]; //"Incompatible pointer types initializing ..." warning here => likely not an array then assert([jsonArray isKindOfClass:[NSArray class]]); //could be made in one liner with KVC //get the URL strings out of the jsonArray for (int x = 0; x < jsonArray.count; x++) { NSString *urlString = [[jsonArray objectAtIndex:x] objectForKey:@"image_URL"]; NSLog(@"String is %@ ", urlString); [urlArray addObject:urlString]; } [self loadImageArray:urlArray handler:^(NSArray* imageArray) { [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; for (int x = 0; x < imageArray.count; x++) { CGRect frame; frame.origin.x = self.mainScroll.frame.size.width * x; frame.origin.y = 0; frame.size = self.mainScroll.frame.size; UIImageView *nextIV = [[UIImageView alloc] initWithFrame:frame]; [nextIV setImage:imageArray[x]]; [self.mainScroll addSubview:nextIV]; //NSLog(@"Pass %d", x); } self.mainScroll.contentSize = CGSizeMake(self.mainScroll.frame.size.width * imageArray.count,1.0); }]; } //for SIMPLICITY I do synchronous networking here! - (void)loadImageArray:(NSArray *)urlArray handler:(void(^)())handler { dispatch_async(dispatch_get_global_queue(0, 0), ^{ NSMutableArray *imageArray = [NSMutableArray array]; for (int y = 0; y < urlArray.count; y++) { NSString *urlString = [urlArray objectAtIndex:y]; NSLog(@"Array String is: %@ ", urlString); NSURL *arrayURL = [NSURL URLWithString:urlString]; NSURLRequest *imageRequest = [NSURLRequest requestWithURL:arrayURL]; NSData *imgData = [NSURLConnection sendSynchronousRequest:imageRequest returningResponse:nil error:nil]; UIImage *image = [UIImage imageWithData:imgData]; [imageArray addObject:image]; } dispatch_async(dispatch_get_main_queue(),^ { handler(imageArray); }); }); } @end </code></pre>

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