how to add objects to existing array in objective c - objective-c

Question

I am new to objective c and having some problem with nsmutableArray.I have button and two textfields on my gui and i want that when i click on button the strings from textfields should be added to my existing array. But the problem is that when i click on button it always create new array.Help anybody.
my button code in myfile.m is as follows:
NSMutableArray* myArray = [NSMutableArray array];
NSString *strr=[textf stringValue];
NSString *strr1=[textf1 stringValue];
// [myArray addObject:strr]; // same with float values
// [myArray addObject:strr1];
[myArray addObject:strr];
[myArray addObject:strr1];
int i,j=0;
int count;
for (i = 0, count = [myArray count]; i < count; ){
NSString *element = [myArray objectAtIndex:i];
NSLog(#"The element at index %d in the array is: %#", i, element);
}

Answer 1

Because you always create new array in this line:
NSMutableArray* myArray = [NSMutableArray array];
Make your array as property of your class object. Example:
#interface MyClass ()
#property (nonatomic, strong) NSMutableArray * array;
#end
#implementation MyClass
- (id)init {
self = [super init];
if ( self ) {
_array = [NSMutableArray array];
}
return self;
}
- (IBAction)onButtonClick {
NSString *strr = [textf stringValue];
NSString *strr1 = [textf1 stringValue];
[self.array addObject:strr];
[self.array addObject:strr1];
for ( int i = 0; i < [myArray count]; i++ ) {
NSString * element = [myArray objectAtIndex:i];
NSLog(#"The element at index %d in the array is: %#", i, element);
}
}
#end