次のコードを実行すると、xcode 4.5 と SDK 6.0 で別の厄介なバグが見つかりました。
UIColor *newcolor = [UIColor colorWithCIColor:[CIColor colorWithString:@"1 1 1 1"]];
[button setTitleColor:newcolor forState:UIControlStateNormal];
UILabel *lbl = selectedbutton.titleLabel;
常にエラーで失敗します:
-[UICIColor colorSpaceName]: unrecognized selector sent to instance 0xa9864f0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UICIColor colorSpaceName]: unrecognized selector sent to instance 0xa9864f0'
*** First throw call stack: [...]
libc++abi.dylib: terminate called throwing an exception