How do I list all fields of an object in Objective-C?

Question

If I have a class, how can I list all its instance variable names?

eg:

@interface MyClass : NSObject {
    int myInt;
    NSString* myString;
    NSM         


        

Answer 1

As mentioned, you can use the Objective-C runtime API to retrieve the instance variable names:

unsigned int varCount;

Ivar *vars = class_copyIvarList([MyClass class], &varCount);

for (int i = 0; i < varCount; i++) {
    Ivar var = vars[i];

    const char* name = ivar_getName(var);
    const char* typeEncoding = ivar_getTypeEncoding(var);

    // do what you wish with the name and type here
}

free(vars);