Build a Calculator App with Swift 4 And AutoLayout

A calculator app is a great to start learing and developing a simple iOS application.A calculator app can go from simple to complex very quickly.

key steps fllow to develop Calculator App:

1. Use AutoLayout to design screen and also use stackView to design layout.
2. Design are support all device from iphone 5 to iphone 7 .
3. Make seperate class for all math operation.

class Calculator {

    func Add(firstNumber:Double ,secondNumber:Double) -> Double {
        return firstNumber+secondNumber;
    }
    
    func subtract(firstNumber:Double ,secondNumber:Double  ) -> Double {
        return firstNumber-secondNumber;
    }
    
    func Multiple(firstNumber:Double ,secondNumber:Double  ) -> Double {
        return firstNumber*secondNumber;
    }
    
    func Division(firstNumber:Double ,secondNumber:Double  ) -> Double {
        return firstNumber/secondNumber;
    }
    
}

4. Use Tag to define UIButton Action.

inputTextField.text = inputTextField.text! + String(sender.tag);

Calculator App Screen Shot

iPhone 5 Screen shot

iPhone 5 Screen shot

iPhone 7 Screen shot

iPhone 7 Screen shot

Develop By: Md Abdul Gafur.