Question

I am just starting off with Objective-C and iphone app dev, i’m trying to design a calculator app, the logic i have used is this :
when the user clicks any button i take the title of the button by
[sender titleForState:UIControlStateNormal] method and then go on appending it onto a string(NSString *result).
say the user enters 123+456 , then in my string i will have “123+456”, now i want two strings “123” and “456” so that i can add them by [result intValue] method.

So my question is, how do i get these two separate strings (“123” & “456”)?

An example code with suitable methods would be very helpful.

Answer 1

NSString * mystring = @"123+456";
NSArray * array = [mystring componentsSeparatedByString:@"+"];
NSString * str1 = [array objectAtIndex:0]; //123
NSString * str2 = [array objectAtIndex:1]; //456