Chapter 3 Page Control & Image Views

programmer2010 · July 7th, 2010, 05:04 PM

When the Page Control & Image view program is run it should load the first image specified in ViewDidLoad, correct?

If so, I cannot get the initial image to load into the view. I have rechecked the code and it compiles ok with no errors.

TraceEv · July 14th, 2010, 01:33 AM

You are correct, the first image should load automatically.

Does the first image load if you swipe to the second page, and then back to the first page again? If so, you may have spelled the file name of the image incorrectly in the viewDidLoad method. The program will compile even if the file name is incorrect.

If none of the images load, then you may want to make sure you added the images to the Resources folder.

programmer2010 · July 14th, 2010, 02:15 AM

When it runs in the simulator I have to tap on the third dot for an image to show up initially. After I do that it highlights the second dot and shows the second image. Then I can tap the first dot to view the first image. For whatever reason it will not swipe.

nauticalmac · August 24th, 2010, 07:10 AM

Did you resolve this? I have the same issue, the viewDidLoad code is not displaying an image.

thepianoguy · August 24th, 2010, 12:35 PM

The project should work as intended. Be careful about the spelling of the image names since the ones in the book do not all match the supplied files, (missing caps on "iMac" in the image files) so code copied directly from the book will not work.
If you haven't resolved your problem yet, email the project folder to
[email protected]
and I will try to see what you did wrong. Seeing if I can find bugs is a good way for me to learn.

thepianoguy · August 25th, 2010, 09:10 AM

I would check how you set the outlets. A fellow traveller with a similar result sent me their project files, and they had inadvertently set both outlets to the same imageView.
so after the

Code:

[imageView2 setHidden:YES];

call, there was nothing to see.
A quick check would be to comment out this call and rerun the program.
(or just recheck the outlets in Interface Builder.)

drlucas · September 18th, 2010, 08:09 PM

i had a similar issue...my imageView1 was imageview1 (note the caps on the V)...that cost me about 30 minutes of grief, then finally my tag attribute...i had the wrong images set at value 1 and 0...once I swapped them, i was good to go... but that took me a good 60minutes of grief....at least i'm learning. slowly but surely.

djg58 · January 11th, 2011, 11:50 PM

Hi. I've tried coding the page control and image view app several times. Each time the simulator only shows a gray rectangle. Anyone have an idea what I'm doing wrong?
Thanks,
Dov

thepianoguy · January 12th, 2011, 12:21 AM

The first thing to check would be to make sure that after making all of your connections in Interface Builder, that you saved your work. Xcode doesn't know about IB edits until they have been saved, just as Interface Builder doesn't know of outlets and actions declared in Xcode until they have been saved. This step is missing in the instructions.(Should have been the end of step 9)
If that doesn't help let me know.
Bob

djg58 · January 12th, 2011, 07:03 AM

I recreated the project from scratch, saving each time I modified a file. It worked!!

Thanks!!!
Dov