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POiphone - performSelectorInBackground image loading
 

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  1. POiphone - performSelectorInBackground image loading
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    <p>i'm loading images into a UIView inside a UIscrollview using performSelectorInBackground to fetch the images from the URL. Images are getting downloaded correctly into an array but when I assign to the UIImageView these images all the images are assigned to the last page of Scroll view.</p> <pre><code>@implementation DetailViewController - (id)initWithDataSource:(id&lt;TabBarElementProtocol,UITableViewDataSource&gt;)theDataSource { if ([self init]) { // Scroll View scrollView = [[UIScrollView alloc]init]; //a page is the width of the scroll view scrollView.delegate = self; scrollView.pagingEnabled = YES; scrollView.frame = CGRectMake(0, 0, 320, 300); scrollView.contentSize = CGSizeMake(320*10, 300); scrollView.backgroundColor = [UIColor clearColor]; scrollView.showsHorizontalScrollIndicator = NO; scrollView.showsVerticalScrollIndicator = NO; scrollView.scrollsToTop = NO; scrollView.bounces = NO; scrollView.showsHorizontalScrollIndicator = NO; scrollView.pagingEnabled = YES; [self.view addSubview:scrollView]; scrollView.contentOffset = CGPointMake(10*320, 0); [self displayView]; } return self; } -(void) displayView{ DouglasAppDelegate *delegate = (DouglasAppDelegate *)[[UIApplication sharedApplication] delegate]; for (int i=0; i &lt; 10; i++) { myview = [[UIView alloc] init]; myview.frame = CGRectMake(320*i , 0, 320, 300); [myview setBackgroundColor: [UIColor whiteColor]]; pictureImageView = [[UIImageView alloc] initWithFrame:CGRectMake(179, 11, 100, 100)]; pictureImageView.tag = i; [myview addSubview: pictureImageView]; [pictureImageView release]; // Picture URL is accessed dynamically and loading correctly. [dataArray insertObject:[NSMutableArray arrayWithObjects:picUrl,[NSString stringWithFormat:@"%d", i],nil] atIndex:i]; [scrollView addSubview:myview]; } [self performSelectorInBackground:@selector(loadImageInBackground:) withObject:dataArray]; //Pager control tpageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 300 , 320, 17)]; tpageControl.backgroundColor = [UIColor clearColor]; tpageControl.numberOfPages = [delegate.NeuEntries count]; tpageControl.currentPage = delegate.neuDetailIndex; zumPage = delegate.neuDetailIndex ; [tpageControl addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged]; [self.view addSubview: tpageControl]; } - (void) loadImageInBackground:(NSMutableArray *)urlAndTagReference { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSData *imgData; UIImage *img; NSMutableArray *arr1 = [[NSMutableArray alloc] initWithCapacity: [urlAndTagReference count]]; for(int i=0; i&lt;[urlAndTagReference count] ;i++) { NSString *url = [[urlAndTagReference objectAtIndex:i] objectAtIndex:0]; NSURL *imgURL = [NSURL URLWithString:url]; imgData = [NSData dataWithContentsOfURL:imgURL]; img = [[UIImage alloc] initWithData:imgData]; [arr1 insertObject:[NSMutableArray arrayWithObjects:img,[[urlAndTagReference objectAtIndex:i]objectAtIndex:1],nil] atIndex:i]; } [self performSelectorOnMainThread:@selector(assignImageToImageView:) withObject:arr1 waitUntilDone:YES]; } - (void) assignImageToImageView:(NSArray *)imgAndTagReference { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; for(int i=0; i&lt;[imgAndTagReference count] ;i++){ UIImage *img = [[UIImage alloc] init]; img = [[imgAndTagReference objectAtIndex:i] objectAtIndex:0]; NSLog(@"img %@",img); // SAME IMAGES OVERLAPPING ON LAST PAGE OF SCROLL VIEW???????????????? [pictureImageView setImage:img]; } } - (void) pageTurn:(UIPageControl*) aPageController{ int whichPage = aPageController.currentPage; scrollView.contentOffset = CGPointMake(320.0f * whichPage, 0.0f); } - (void)scrollViewDidScroll:(UIScrollView *)sender { CGPoint offset = sender.contentOffset; tpageControl.currentPage = offset.x / 320.0f; } </code></pre>
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    1. This table or related slice is empty.
    1. PTQuestion
    1. USJoe
    1. USpallavi
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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