Question

I am developing a calculator which has a Clear button . I can clear the whole label containing the number easily but I want that it should clear digit by digit on the button click . Is this possible . How can i implement it ?

-(IBAction)cancelOperation
{
currentNumber = 0;

calculatorScreen.text = @”0.00″;

currentOperation = 0;
}

Answer 1

    -(IBAction)cancelOperation
    {
    currentNumber = 0;
    NSString* str = calculatorScreen.text;
    calculatorScreen.text = [str substringToIndex:[string length]-1];;

    currentOperation = 0;
    }