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] |
