Does objective-c methods support "pass by value"? Or perhaps to be more specific:
thanks
Objective-C does not support references, at least not in the C++ sense of the term.
All Objective-C objects are allocated on the heap, and therefore all "object variables" must in fact be pointer types. Whether a pointer can be considered to be effectively the equivalent of a reference is open to debate. When talking C++ for example, there are clear semantic differences (otherwise, what's the point...)
So to answer your questions:
No. It's pass-by-value by default, like in C. Except for the fact that for the Objective C class instance references, the value is a reference. So Objective C class instances are passed effectively by reference.
N/A
See 1.
Not really. You can serialize, pass the string, and recreate inside. Or you can have the object store its ivars as a structure and pass that structure by value. Some objects support cloning.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.