Question

I have three Classes A,B,C. In Class A the code is like this,

B* test=[[C alloc]init];
test.empID= RollNo; //(for eg value is 10)
test.empName=Name; // (for eg name is Cyril)

I can print the values in the Class B, but now i want to inherit that value to the class C, where the Class C is like this,

in header file
@interface C: UITableViewCell

I know that , objective C doesn’t support multiple inheritance, When I import the B class in class C and tried to print it, it showing as null. All i need is to print the values from Class B in Class C. help me

Answer 1

Objective c does not support class variables. but you can use static variable for you requirement.

// A.h
@interface A : NSObject {
}
+ (B*)test;
+ (void)setTest:(B*)object;
@end

// A.m
#import "MyClass.h"

static B* test;

@implementation MyClass

+ (B*)test {
    return test;
}

+ (void)setStr:(B*)object {
    if (test != object) {
        [test release];
        test = [object copy];
    }
}
@end

Declare/Define an static variable within the classA.m so it will be
only accessible for the classA methods (and everything you put inside
classA.m).

Take a look at this post