CGPoint,CGSize,CGRect转NSString以及CGRect的一些便捷实用方法

UIKIT_EXTERN NSString *NSStringFromCGPoint(CGPoint point);
UIKIT_EXTERN NSString *NSStringFromCGVector(CGVector vector);
UIKIT_EXTERN NSString *NSStringFromCGSize(CGSize size);
UIKIT_EXTERN NSString *NSStringFromCGRect(CGRect rect);
UIKIT_EXTERN NSString *NSStringFromCGAffineTransform(CGAffineTransform transform);
UIKIT_EXTERN NSString *NSStringFromUIEdgeInsets(UIEdgeInsets insets);
UIKIT_EXTERN NSString *NSStringFromDirectionalEdgeInsets(NSDirectionalEdgeInsets insets) API_AVAILABLE(ios(11.0),tvos(11.0),watchos(4.0));
UIKIT_EXTERN NSString *NSStringFromUIOffset(UIOffset offset);
UIKIT_EXTERN NSString *NSStringFr