簡單來說
id is a pointer to an objective C object.
void * is a pointer to anything.
Symbol | Value |
---|---|
NULL | (void *)0 |
nil | (id)0 |
Nil | (Class)0 |
NSNull | [NSNull null] |
簡單來說
id is a pointer to an objective C object.
void * is a pointer to anything.
Symbol | Value |
---|---|
NULL | (void *)0 |
nil | (id)0 |
Nil | (Class)0 |
NSNull | [NSNull null] |