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UIScrollView not scrolling although contentSize is smaller than UIImageView

Image
By User



So I have a UIImageView as a subview of UIScrollView, I've set the contentSize to be smaller than the UIImageView width and height, however it doesn't allow me to scroll.. why is this? Here's some code:







UIImage * image = [UIImage imageWithData:data];

                UIImageView * imgView = [[UIImageView alloc] initWithImage:image];

                [imgView setUserInteractionEnabled:YES];

                //[imgView setContentMode:UIViewContentModeScaleAspectFill];

                [imgView setBackgroundColor:[UIColor clearColor]];

                [imgView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

                [imgView setFrame:CGRectMake(0, 0, imgView.frame.size.width, imgView.frame.size.height)];



                CGRect imgFrame;

                imgFrame.size.width = originalImageSize.width;

                imgFrame.size.height = originalImageSize.height;

                imgFrame.origin.x = imageOriginPoint.x;

                imgFrame.origin.y = imageOriginPoint.y;



                UIScrollView * imgScrollView = [[UIScrollView alloc] initWithFrame:imgFrame];

                [imgScrollView setScrollEnabled:YES];

                [imgScrollView setClipsToBounds:YES];

                [imgScrollView addSubview:imgView];

                [imgScrollView setBackgroundColor:[UIColor clearColor]];





  [imgScrollView setFrame:imgFrame];

                [imgScrollView setContentSize:CGSizeMake(200, 200)];



SCROLL VIEW CONTENT SIZE WIDTH IS 200.000000 AND HEIGHT CONTENT SIZE IS 200.000000

UIIMAGE VIEW WIDTH IS 2240.225830 AND HEIGHT IS 2240.225830

SCROLL VIEW FRAME WIDTH IS 768.000000 AND SCROLL VIEW FRAME HEIGHT IS 768.000061







Any idea?


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Comments

  1. Tips For AllJanuary 18, 2012 at 2:35 AM

    That's because that your size of bounds of scroll view is larger than your content size.
    The content size need to be the actual size of image view, and the visible size is set by frame / bounds. I guess you want to scroll a image in a {200, 200} sized rect?
    Try this:

    UIScrollView * imgScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)]; // this is your visible rect
    [imgScrollView setScrollEnabled:YES];
    [imgScrollView setClipsToBounds:YES];
    [imgScrollView addSubview:imgView];
    [imgScrollView setBackgroundColor:[UIColor yellowColor]];

    [imgScrollView setContentSize:imgFrame.size]; // this is your image view size

    ReplyDelete
  2. Tips For AllJanuary 18, 2012 at 2:35 AM

    scroll view content size should be more than scrollView frame width and height
    do this -

    scrollView.contentSize = CGSizeMake(originalImageSize.width,originalImageSize.height);


    I think it will help.

    ReplyDelete

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