Conditionally disable access to private UITouch ivars (fix broken build with iOS 6 SDK)

[kemenaran]

UITouch ivars have been removed of the iOS 6 SDK headers: private API access in UIViewAdditions breaks the build on iOS 6.

The flag to activate the UITouch extensions is now more strict, so that it is not enabled by default in debug builds, and require an explicit setting.

[diederich]

Clean and straightforward. Thanks!

[arthurva]

Just add the following code to support ios6 sdk:

#ifdef __IPHONE_6_0
@interface UITouch () {
NSTimeInterval _timestamp;
UITouchPhase _phase;
UITouchPhase _savedPhase;
NSUInteger _tapCount;

UIWindow *_window;
UIView *_view;
UIView *_gestureView;
UIView *_warpedIntoView;
NSMutableArray *_gestureRecognizers;
NSMutableArray *_forwardingRecord;

CGPoint _locationInWindow;
CGPoint _previousLocationInWindow;
UInt8 _pathIndex;
UInt8 _pathIdentity;
float _pathMajorRadius;
struct {
    unsigned int _firstTouchForView:1;
    unsigned int _isTap:1;
    unsigned int _isDelayed:1;
    unsigned int _sentTouchesEnded:1;
    unsigned int _abandonForwardingRecord:1;
} _touchFlags;

}
@EnD
#endif

[fredstyles]

Thanks arthurva.