CODEWITHSUNDEEP
iosobjective-ciphoneswiftinit
vikas prajapati
vikas prajapati

Reputation: 1946

Not able to call method in diffrent class without write init method

I am not able to call handleRegister method on tap from another class.

I created a class named A which has handleRegister method:

class A {
   static var a:A?
   init(){
      A.a = self
   }

   @objc func handleRegister(){
      print("Hello method1")
   }
}

ViewController class from where i am calling handleRegister method:

class ViewController: UIViewController {
  
    @IBOutlet weak private var btnFirst :UIButton?
  
    override func viewDidLoad() {
       super.viewDidLoad()
       // Do any additional setup after loading the view, typically from a nib.
       let obj = A()
       btnFirst?.addTarget(obj, action: #selector(obj.handleRegister), for: UIControlEvents.touchUpInside)
    }
  
    override func didReceiveMemoryWarning() {
       super.didReceiveMemoryWarning()
       // Dispose of any resources that can be recreated.
    }
}

In my ViewController class i have btnFirst now i am trying to add target for btnFirst and try to calling handleRegister method which is form class A which is working fine.

But my question is when i comment init method in class A then i m not able to call method handleRegister.

can anyone tell me why init method important to add button target of another class

Upvotes: 1

Views: 110

Answers (1)

Sahil
Sahil

Reputation: 9226

You are creating A class object in viewDidLoad which will get deallocated immediately after the viewDidLoad. in A class initializer you are creating strong reference of A by writing this A.a = self (that's why your button action is called). Simply create A class object outside viewDidLoad and it will work fine.

Upvotes: 2

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