.h

@interface StaticClazz: NSObject
+ (StaticPropertyClazz*)staticProperty;
@end

.m

static StaticPropertyClazz* _staticProperty = nil;

@implementation StaticClazz()

+ (StaticPropertyClazz*) staticProperty {
return _staticProperty;
}

+ (void)setStaticProperty(StaticPropertyClazz*)staticProperty {
_staticProperty = staticProperty;
}