问题
Earlier I was on XCode 4.2 for a long time on Snow Leopard for a long time. I have made a straight jump to Mountain Lion with XCode 4.5 on with iOS 6 SDK and ARC.
A lot has changed for me. Just wanted to know, whether the naming style of default variables has changed ?
because in older XCode if I wont declare an ivar myself, it would take the same name as the property.
In 4.5, I declared a property (no synthesize required anymore!).
In the overidden setter, I am trying to use the variable as the same name as the property, say abc.
but XCode is not recognizing it and giving me suggestions of _abc !
Does the auto-generated ivar starts with _ now ?
回答1:
The automatically generated @synthesize statement uses instance variables prepended with an underscore:
@synthesize abc = _abc;
But an explicit @synthesize statement without instance variable
@synthesize abc;
is still equivalent to
@synthesize abc = abc;
for compatibility with older Xcode versions.
来源：https://stackoverflow.com/questions/14556232/what-name-does-the-auto-generated-ivar-take-when-i-just-declare-a-property-in-xc