How to create buttons that add integers to a Mutable Array? - objective-c

Question

I am quite new to iOS programming. Can anyone help me on how to create two buttons (button 1 and button 2) that add integers (integer 1 and integer 2) to a Mutable array when each button is clicked?
Means that when Button 1 is clicked, integer 1 is added to the mutable array, and when integer 2 is clicked, integer 2 will be added to the mutable array. I understand we need to create an instance of the mutable array before we can use the array, but I'm not sure where is the best place to do that?
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSMutableArray *inputArray = [[NSMutableArray alloc] init];
}
- (IBAction)Button1:(id)sender {
int _userinput = 1;
NSNumber *userinput = [NSNumber numberWithInteger:_userinput];
[self.inputArray addObject:userinput];
NSLog(#"%#", self.inputArray[0]);
}

Answer 1

You can create instance variable of NSMutableArray and two buttons with setting tag value and on clicking the same you can add it to array.like that below:-
- (void)viewDidLoad
{
[super viewDidLoad];
self.mutArr=[NSMutableArray array];
NSUInteger j=0;
for(NSUInteger i=0; i<2; i++)
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(buttonClicked:)
forControlEvents:UIControlEventTouchUpInside];
[button setTitle:[NSString stringWithFormat:#"%# %ld",#"Button",i+1] forState:UIControlStateNormal];
button.frame = CGRectMake(80.0+j, 210.0, 160.0, 40.0);
[self.view addSubview:button];
button.tag=i+1;
j=100;
}
}
-(void)buttonClicked:(id)sender
{
[self.mutArr addObject:#([sender tag])];
NSLog(#"%#",self.mutArr);
}