iOS 复杂构造类型与字符串互相转换

复杂构造类型转字符串方法：

NSString *NSStringFromCGPoint(CGPoint point);
NSString *NSStringFromCGSize(CGSize size);
NSString *NSStringFromCGRect(CGRect rect);
NSString *NSStringFromUIOffset(UIOffset offset);
NSString *NSStringFromUIEdgeInsets(UIEdgeInsets insets);
NSString *NSStringFromCGVector(CGVector vector);
NSString *NSStringFromCGAffineTransform(CGAffineTransform transform);

字符串转复杂构造类型方法：

CGPoint CGPointFromString(NSString *string);
CGSize CGSizeFromString(NSString *string);
CGRect CGRectFromString(NSString *string);//我们在监听高度变化时需要用这个,获取键盘的frame值,就是从一个string类型中取出CGRect!
UIOffset UIOffsetFromString(NSString *string); 
UIEdgeInsets UIEdgeInsetsFromString(NSString *string);//距离边界的距离,上左下右的顺序!
CGVector CGVectorFromString(NSString *string);
CGAffineTransform CGAffineTransformFromString(NSString *string);