UIScrollView contentSize Issue

Question

Within my view I create a scrollview with a width of 320 and a height of 70.

Responding to the user touching a button, I expand the scrollview, so it is 380(h) x 320(w) in size.

The code for this is shown below:

CGRect scrollviewFrame = CGRectMake(0, 30, 320, 380);
[scrollView setFrame:scrollviewFrame];
[self layoutScrollImages:YES];
CGSize srect =  CGSizeMake([scrollView bounds].size.width, (kNumImages * kScrollObjHeight));
[scrollView setContentSize:srect];

As I debug this project, I can see that srect is 320 (w) x 8000 (h) in size; however my issue is the scrollable area (where the user can actually touch to scroll the scrollview) remains the same as when it was it's original size.

I'm obviously missing something, does anyone know what it is?

Edit: I have created a sample project to illustrate the issue I am having, it is available here: http://dl.dropbox.com/u/9930498/ScrollViewTest.zip

Answer 1

I think , you have issue with your below line of code.

CGSize srect =  CGSizeMake([scrollView bounds].size.width, (kNumImages * kScrollObjHeight));
   [scrollView setContentSize:srect];

debug your program and see the content of srect , Also let us know the value of below two constant

kNumImages,kScrollObjHeight .