Question

I have an IPad application in which i am adding a calc type keypad,with 9 numerics and one back button .With all numerics i am upending the value of the text field like this [number setText:[number.text stringByAppendingString:@"number"]];.Now in the backtrace action i need to remove the last added value. I have tried this [number.text substringToIndex:[number.text length]-2]; But with no luck.Can anybody help me to achieve that?

Answer 1

Here is the answer:

if ( [number.text length] > 0)
        number.text = [number.text substringToIndex:[number.text length] - 1];