How can I limit the number of decimal points in a UITextField?

Question

I have a UITextField that when clicked brings up a number pad with a decimal point in the bottom left. I am trying to limit the field so that a user can only place 1 decimal

Answer 1

Short told, the number format is as follows [NSString stringWithFormat:@"%9.5f", x]; Where 5 is the decimal after ",".

Answer 2

For Swift 2.3 to prevent user for enter decimal number after two places -

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
    let decimalPlacesLimit = 2
    let rangeDot = txtPrice.text!.rangeOfString(".", options: .CaseInsensitiveSearch)

    if rangeDot?.count > 0
    {
        if (string == ".")
        {
            print("textField already contains a separator")
            return false
        }
        else {

            var explodedString = txtPrice.text!.componentsSeparatedByString(".")
            let decimalPart = explodedString[1]
            if decimalPart.characters.count >= decimalPlacesLimit && !(string == "")
            {
                print("textField already contains \(decimalPlacesLimit) decimal places")
                return false
            }
        }
    }
}

Answer 3

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{
    if(textField == min_textfield )
    {
        if([textField.text rangeOfString:@"."].location == NSNotFound)
        {
            if([string isEqualToString:@"."] )
            {
                flag_for_text = 1;
            }
            else 
            {
                textField.text = [NSMutableString stringWithFormat:@"%@",textField.text];
            }
        }
        else 
        {
            if([string isEqualToString:@"."])
            {
                return NO;
            }
            else 
            {
                textField.text = [NSMutableString stringWithFormat:@"%@",textField.text];
            }
        }
    }
}