// Get weak reference object.

#define WeakObject(object) __weak __typeof(object) weakObject = object;

// Get weak reference object.

#define Weak(caller, object) __weak __typeof(object) caller = object;

// Get strong reference object.

#define StrongObject(object) __strong __typedef(object) strongObject = object;

都是范德萨范德萨发斯蒂芬