Question

Maybe this is obvious, but I don’t know how to declare class properties in Objective-C.

I need to cache per-class a dictionary and wonder how put it in the class.

Answer 1

properties have a specific meaning in Objective-C, but I think you mean something that’s equivalent to a static variable? E.g. only one instance for all types of Foo?

To declare class functions in Objective-C you use the + prefix instead of – so your implementation would look something like:

// Foo.h @interface Foo { }  + (NSDictionary *)dictionary;  // Foo.m + (NSDictionary *)dictionary {   static NSDictionary *fooDict = nil;   if (fooDict == nil) {     // create dict   }   return fooDict; }