When a custom button is pressed UILabel won't update (Objective-C) - ios

Question

(I'm currently learning iOS Development so I apologize in advanced of my limited knowledge.)
What I am trying to accomplish is that whenever you press either the addition or subtraction button the label will increment by one and will display the result by the label. I am having difficulty with displaying the result in the label.
This is my ViewController.h file:
#import <UIKit/UIKit.h>
#import "StepperView.h"
#interface ViewController : UIViewController{
UILabel *valueLabel;
}
#end
This is my ViewController.m file:
#import "ViewController.h"
#import "StepperView.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
int w;
w = 0;
[super viewDidLoad];
StepperView *stepperView = [[StepperView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
stepperView.center = self.view.center;
[self.view addSubview:stepperView];
// AddButton
UIButton *additionButton = [[UIButton alloc] initWithFrame:CGRectMake(195, 318, 100, 100)];
additionButton.frame = CGRectMake(stepperView.frame.size.width/2 + 50, stepperView.frame.size.height/2 - 25, 100, 50);
[self.view addSubview:additionButton];
// Subtraction button
UIButton *subtractionButton = [[UIButton alloc] initWithFrame:CGRectMake(195, 318, 100, 100)];
subtractionButton.frame = CGRectMake(stepperView.frame.size.width/2 - 150, stepperView.frame.size.height/2 - 25, 100, 50);
[self.view addSubview:subtractionButton];
// Label
valueLabel = [[UILabel alloc] initWithFrame:CGRectMake(195, 318, 100, 100)];
[valueLabel setTextColor:[UIColor redColor]];
[self.view addSubview:valueLabel];
}
#end
This is my Delegate and Protocol:
StepperView.h
#import <UIKit/UIKit.h>
#protocol SwitchViewDelegate
- (void)switchViewValueChanged:(int)number;
#end
#interface StepperView : UIView
{
}
#property (nonatomic,weak) id<SwitchViewDelegate> delegate;
#end
This is my StepperView.m file
#import "StepperView.h"
#implementation StepperView
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
[self setup];
return self;
}
- (void)setup {
UIView *stepperView = [[UIView alloc] init];
stepperView.frame = CGRectMake(0, 0, 300, 40);
stepperView.backgroundColor = [UIColor colorWithRed:21/255.0 green:101/255.0 blue:192/255.0 alpha:1.0];
[self addSubview:stepperView];
// Add Button
UIButton *rightView = [[UIButton alloc] init];
rightView.frame = CGRectMake(stepperView.frame.size.width/2 + 50, stepperView.frame.size.height/2 - 20, 100, 40);
rightView.backgroundColor = [UIColor colorWithRed:33/255.0 green:150/255.0 blue:243/255.0 alpha:1.0];
[rightView setTitle:#"+" forState:UIControlStateNormal];
[rightView addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:rightView];
// Subtract Button
UIButton *leftView = [[UIButton alloc] init];
leftView.frame = CGRectMake(stepperView.frame.size.width/2 - 150, stepperView.frame.size.height/2 - 20, 100, 40);
leftView.backgroundColor = [UIColor colorWithRed:33/255.0 green:150/255.0 blue:243/255.0 alpha:1.0];
[leftView setTitle:#"-" forState:UIControlStateNormal];
[leftView addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:leftView];
// Label
UILabel *valueLabel = [[UILabel alloc] initWithFrame:CGRectMake(stepperView.frame.size.width/2, stepperView.frame.size.height/2, 100, 100)];
[valueLabel setText:#"10"];
[valueLabel setTextColor:[UIColor redColor]];
[self addSubview:valueLabel];
}
- (void)buttonPressed:(id)sender{
UIButton *button = (UIButton *) sender;
NSString *title = button.titleLabel.text;
if([title isEqualToString:#"-"]) {
NSLog(#"MINUS");
} else {
NSLog(#"PLUS");
}
// NSLog(#"%#",title);
}
#end

Answer 1

I am not sure if i understand clear what you want to do, but why don't you try to use the UIStepper button provided by iOS?
You can add an IBAction to your viewController and change the label with the value from the UIStepper.
Using swift:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var valueLabel: UILabel!
var currentValue = 0
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func touchStepper(sender: UIStepper) {
self.valueLabel.text = "\(sender.value)"
}
}

Answer 2

It's not very clear what you're trying you obtain as UI, i'm posting a possible solution which is using
The delegate to pass the information from StepperView to the ViewController
UILabel to present the result which is subview of ViewController's view, instead to be subview of StepperView
ViewController.h:
#import <UIKit/UIKit.h>
#import "StepperView.h"
#interface ViewController : UIViewController
#property (nonatomic, strong) UILabel *valueLabel;
#end
ViewController.m
#import "ViewController.h"
#import "StepperView.h"
#interface ViewController () <StepperViewDelegate>
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
StepperView *stepperView = [[StepperView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
stepperView.center = self.view.center;
[self.view addSubview:stepperView];
stepperView.delegate = self;
// Label
self.valueLabel = [[UILabel alloc] initWithFrame:CGRectMake(195, 318, 100, 100)];
[self.valueLabel setTextColor:[UIColor redColor]];
[self.view addSubview:self.
valueLabel];
}
#pragma mark - StepperViewDelegate
- (void)stepperView:(StepperView *)stepperView valueChanged:(NSInteger)value {
self.valueLabel.text = [NSString stringWithFormat:#"%d", value];
}
#end
StepperView.h
#import <UIKit/UIKit.h>
#class StepperView
#protocol StepperViewDelegate
- (void)stepperView:(StepperView *)stepperView valueChanged:(NSInteger)value
#end
#interface StepperView : UIView
#property (nonatomic, weak) id<StepperViewDelegate> delegate;
#property (nonatomic, assign) NSInteger stepperValue;
#end
StepperView.m
#import "StepperView.h"
#implementation StepperView
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
[self setup];
return self;
}
- (void)setup {
UIView *stepperView = [[UIView alloc] init];
stepperView.frame = CGRectMake(0, 0, 300, 40);
stepperView.backgroundColor = [UIColor colorWithRed:21/255.0 green:101/255.0 blue:192/255.0 alpha:1.0];
[self addSubview:stepperView];
// Add Button
UIButton *rightView = [[UIButton alloc] init];
rightView.frame = CGRectMake(stepperView.frame.size.width/2 + 50, stepperView.frame.size.height/2 - 20, 100, 40);
rightView.backgroundColor = [UIColor colorWithRed:33/255.0 green:150/255.0 blue:243/255.0 alpha:1.0];
[rightView setTitle:#"+" forState:UIControlStateNormal];
[rightView addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:rightView];
// Subtract Button
UIButton *leftView = [[UIButton alloc] init];
leftView.frame = CGRectMake(stepperView.frame.size.width/2 - 150, stepperView.frame.size.height/2 - 20, 100, 40);
leftView.backgroundColor = [UIColor colorWithRed:33/255.0 green:150/255.0 blue:243/255.0 alpha:1.0];
[leftView setTitle:#"-" forState:UIControlStateNormal];
[leftView addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)buttonPressed:(id)sender{
UIButton *button = (UIButton *) sender;
NSString *title = button.titleLabel.text;
if([title isEqualToString:#"-"]) {
self.stepperValue--;
} else {
self.stepperValue++;
}
[self.delegate stepperView:self valueChanged:self.stepperValue];
// NSLog(#"%#",title);
}
#end
This should give you more clear vision how different components should corespondent with each other.