How do I check if a CGPoint has been initialised?

Question

I would like to initially set a CGPoint property to a particular point (middle of screen). Other methods may subsequently wish to change this property. My thoughts were to initi

Answer 1

An easier way would be to initialize _graphOrigin to CGRectZero and change your if statement for this:

if (!CGPointEqualToPoint(_graphOrigin, CGPointZero)) {  

}