Lazy property

README.md

Usage

@interface Foo : NSObject

@property (nonatomic, strong) NSString *foo;

@end

@implementation Foo

LAZY(foo, ^{
    return @"foo";
});

@end

lazy.h

#define VARNAME(_name) _ ## _name
#define LAZY(_name, _init...) -(id)_name {\
if (!VARNAME(_name)) {\
VARNAME(_name) = _init();\
}\
return VARNAME(_name);\
}