Objective-C, inheritance between functions - ios

Question

What I want is to inherit trueCount and falseCount values from func1 to func2 as you can see in the code below.
Any help on how to do that ?
- (void)func1 {
int trueCount = 0;
int falseCount = 0;
if (test3) {
trueCount++;
} else {
falseCount++;
}
if (trueCount >= falseCount) {
NSLog(#"TRUE WINS !!";
} else if (trueCount < falseCount) {
NSLog(#"False WINS !!");
}
}
- (void)func2 {
///HOW to make trueCount AND falseCount work here too, so that they inherit the same value in func1 ??
if (trueCount >= falseCount) {
NSLog(#"Show 1 !!";
} else if (trueCount < falseCount) {
NSLog(#"Show 2");
}
}

Answer 1

Your example does not show functions, it shows methods. Neither methods nor functions can be inherited - only classes can inherit other classes. However, nothing stops you from calling one method from inside another method to share the results produced by it. You could also move the shared functionality into a "helper" method, and use it in both places, like this:
// Define the shared method. Note the use of pointers.
-(void)countTrue:(int*)trueCount andFalse:(int*)falseCount {
*trueCount = 0;
*falseCount = 0;
if (test3) {
*trueCount++;
} else {
*falseCount++;
}
}
- (void)func1 {
int trueCount;
int falseCount;
// Invoke the shared functionality from the first place in your code
[self countTrue:&trueCount andFalse:&falseCount];
if (trueCount >= falseCount) {
NSLog(#"TRUE WINS !!";
} else if (trueCount < falseCount) {
NSLog(#"False WINS !!");
}
}
- (void)func2 {
int trueCount;
int falseCount;
// Invoke the shared functionality from a second place in your code
[self countTrue:&trueCount andFalse:&falseCount];
if (trueCount >= falseCount) {
NSLog(#"Show 1 !!";
} else if (trueCount < falseCount) {
NSLog(#"Show 2");
}
}
Now the logic of counting is placed in a single place, so you do not need to repeat it.

Answer 2

You'll want to do something like this in your header:
#inteface GameCounter
#property (nonatomic) NSInteger trueCount;
#property (nonatomic) NSInteger falseCount;
#end
and then use self.trueCount and self.falseCount

Answer 3

This question really has nothing to do with iOS or Objective-C. It is an Object Oriented question.
You have methods in a class. Those methods operate on some state, configuring, modifying and querying that state. Your methods (they aren't functions) are called without parameters, so no state is being added. Your class should have state of its own.
#interface MyClass ()
#property (nonatomic) NSInteger trueCount;
#property (nonatomic) NSInteger falseCount;
#property (nonatomic) BOOL test3;
#end
#implementation MyClass
- (void)method1 {
if (self.test3) {
self.trueCount++;
} else {
self.falseCount++;
}
if (self.trueCount >= self.falseCount) {
NSLog(#"TRUE WINS !!";
} else if (self.trueCount < self.falseCount) {
NSLog(#"False WINS !!");
}
}
- (void)method2 {
if (self.trueCount >= self.falseCount) {
NSLog(#"Show 1 !!";
} else {
NSLog(#"Show 2");
}
}
#end