Add object to an array does not work, when I iterate through the array I see no objects
===

What I want:

On the iPhone user enters few values and tap on save button.
App should store the values in an instance of `VehicleClass` and add it to an `NSMutableArray`.

Hope you can help.

ViewController.h

    #import <UIKit/UIKit.h>
    #import "VehicleClass.h"
    
    @interface ViewController : UIViewController
     
    @property (weak, nonatomic) IBOutlet UITextField *producerTextField;
    @property (weak, nonatomic) IBOutlet UITextField *modelTextField;
    @property (weak, nonatomic) IBOutlet UITextField *pYearTextField;
    @property (weak, nonatomic) IBOutlet UITextField *priceTextField;
    
    @property (weak, nonatomic) NSMutableArray *carArray;
    @property (weak, nonatomic) IBOutlet UILabel *statusLabel;
    
    
    - (IBAction)addCar:(id)sender;
    - (IBAction)showCars:(id)sender;
    
    @end

ViewController.m

    @synthesize producerTextField, modelTextField, pYearTextField, priceTextField, carArray;
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        
        carArray = [NSMutableArray array];
    }
    
    - (IBAction)addCar:(id)sender
    {
        VehicleClass *newVehic = [[VehicleClass alloc]initWithProducer:producerTextField.text 
                                                              andModel:modelTextField.text
                                                              andPYear:producerTextField.text
                                                              andPrice:priceTextField.text];
        
        [carArray addObject:newVehic];
        if (carArray != nil) {
            statusLabel.text = @"Car saved to array.";
        }
        else {
            statusLabel.text = @"Error, check your code.";
        }
    }

VehicleClass.h

    #import <Foundation/Foundation.h>
    
    @interface VehicleClass : NSObject
    
    @property (weak, nonatomic) NSString *producer;
    @property (weak, nonatomic) NSString *model;
    @property (weak, nonatomic) NSString *pYear;
    @property (weak, nonatomic) NSString *price;
    
    
    -(id)initWithProducer:(NSString *)varProducer 
                 andModel:(NSString *)varModel 
                 andPYear:(NSString *)varPYear 
                 andPrice:(NSString *)varPrice; 
    
    @end

VehicleClass.m

    #import "VehicleClass.h"
    
    @implementation VehicleClass
    
    @synthesize model, price,pYear,producer;
    
    
    -(id)initWithProducer:(NSString *)varProducer 
                 andModel:(NSString *)varModel 
                 andPYear:(NSString *)varPYear 
                 andPrice:(NSString *)varPrice
    {
        self = [super init];
        if (self != nil) 
        {
            producer = varProducer;
            model = varModel;
            pYear = varPYear;
            price = varPYear;
        }
        return self;
    }
    
    @end

Maybe the problem has something to do with my init method?