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There are missing files in folder National Park Service Images of PagedImageScrollView (2 edition - C07 - 6). Looks like they was not copied to a project folder.

I'm getting a compiler error on the Constraints.h file when I try to call the MATCH_HEIGHT(FROMVIEW, TOVIEW) macro. It's coming from the _INSTALL_CONSTRAINTS(PRIORITY, NAME, ...) macro. It doesn't recognize NSArray. I even tried importing Foundation at the top of the header, but that didn't work.

Any ideas on what I'm doing wrong here?

I'm curious about your choice to call [super updateConstaints] at the beginning of the implementation. In Apple's docs (https://developer.apple.com/library/ios/documentation/uikit/reference/uiview_class/uiview/uiview.html#//apple_ref/occ/instm/UIView/updateConstraints) it is recommended to call it at the end of the implementation. For what it is worth, I've tried both, and didn't notice any differences.

Hi Ericka,

I have a question regarding this code:

I thought you should not change directly layer properties unless you are doing it in updateLayer method. But perhaps I'm missing something. Can you please clarify it to me?

Thank you in advance :)

Patryk

chapter 3,exercise 8 answer
8. Describe the results the constraint @"H:|-(-20)-[view1(==50)]" produces.
The view’s height is constrained to 50 points. It’s placed 20 points above the top of the
view. Only the bottom 30 points of the view extend within its superview.

This statement maybe incorrect,"It’s placed 20 points above the top of the
view"。Because the placement of the view is unknown until it has been constrainted already.

chapter 7 p213 the first paragraph below the title,"Table Cells"。
“You see an example of the playback indicator on the fourth row of the table.”
it seems the correct statement is,"You see an example of the playback indicator on the second row of the table."

I can not download the files from here it starts it downloads like 299.1mb den it stops there i have tried many times but still the same problem

second edition
Chapter 3, Page 72
in the table of IB Element description,the second last row,last paragraph,it says"The Container variation of each command (found at the bottom of the resolution menu) generates constraints for the entire scene, not just the selected view." However,I just can not find where the Container variation is.I just guess it should be View Controller or its view instead.Any help will be appreciated.