[textfield.text floatValue] returns incorrect float value

[Whitehk]

Whenever the textfield contains 9 or more numbers, [textfield.text floatValue] will return a number with the first 7 numbers correct, but the last 2 wrong. For example, say I type 987654321 into the textfield. It will show in the actual textfield that I type 987654321. However, [textfield.text floatValue] will return something to the effect of 987654336. Why is this? Here is some code:

-(IBAction)numberOneKeyPressed {
//If the textfield isn't empty
        if([textField.text length] != 0) {
//And if the textfield has less than 9 numbers
            if([textField.text length] < 9) {
//Add a 1 to the end of the previous textfield value
                    textField.text = [NSString stringWithFormat:@"%.0f1",textFieldFloatValue];
//And assign the textfield floatvalue to the float variable
                    textFieldFloatValue = [[textField text] floatValue];
            }
        }
//if the textfield was empty to begin with
 else {
//just make the textfield say 1
            textField.text = [NSString stringWithFormat:@"1"];
//and assign the floatvalue to the float variable
            textFieldFloatValue = [[textField text] floatValue];
        }
//The NSLog here returns the incorrect value therefore showing me that the float variable is incorrect as well
    NSLog(@"%.0f",[[textField text] floatValue]);
}

As you can see, I have created a custom keyboard dealing with numbers. The method I provided you with is what is called when the user press the 1 button on the custom keyboard. Of course, I have the methods for the other numbers as well, but they are pretty much duplicates of this method, but substituting the correct numbers depending on which key is pressed. It works completely fine until the 9th number. Any ideas as to what's going on? Thanks in advance.

[JasonR]

Try replacing floatValue with doubleValue to see if that helps.

[Whitehk]

Originally Posted by JasonR

Try replacing floatValue with doubleValue to see if that helps.

Thank you! This was part the problem. What I ended up doing was converting everything that had to do with floats to doubles, and instead of saying [[textfield text] doubleValue] I needed to change it to say [textfield.text doubleValue]. I wasn't sure why that was a problem too, but it was fixed once I did both of those things. Again, thanks.

[baja_yu]

Hmm... I'm not sure what difference that could have made. textfield.text and [textfield text] are the same thing. The dot notation was introduce in ObjC v2 as a convenience to those more familiar with it but it translates to the same thing.