can not run your code

[AllanChen]

can not run your code

[ErwannRobin]

@AllanChen > add : @synthesize window, viewController;
after @implementation DMAppDelegate
in DMAppDelegate.m

I think it may be caused by a different xcode version.

[AllanChen]

I think that is not xcode project problem.. my xcode version is 4.3.1 .. and i try to find that issue, final i replace your viewController and run ,the problem was gone.. i really dont know why. any idea for this ?

[ErwannRobin]

I can confirm you that it was due to xcode version.
I just updated to xcode 4.5 and the code compiles vanilla, without modifications.

I think some @Synthetize statements became not compulsory with latest xcode version

[malcommac]

fixed. thanks!