UIColor的CGColor访问器是属性还是方法？

Question

I found a curious bit of code near the bottom of UIColor.h (lines 69-71 in my SDK):

// Access the underlying CGColor or CIColor.
@property(nonatomic,readonly) CGColorRef CGColor;
- (CGColorRef)CGColor NS_RETURNS_INNER_POINTER CF_RETURNS_NOT_RETAINED;

Why is CGColor defined as both a property and a method? Is it truly a property but just defined as a method so they use the two annotations?

Answer 1

该方法是属性的综合getter方法，需要声明该方法才能分配返回注释