Question

I have three UITextFields. Two of them represent a certain number value. The third represents the percentage of the two. How do I setup the 3rd UITextField to do this simple math?

Answer 1

You can simply get the intValue or the floatValue or the doubleValue of the text that you have received from the first two text fields. Eg:

float firstFloat = [self.firstTextField.text floatValue];
float secondFloat = [self.secondTextField.text floatValue];
float answer = firstFloat / secondFloat; //or whatever math you need to do

self.thirdTextField.text = [NSString stringWithFormat:@"%.2f",answer];

Hope this helps.