Question

i am new to the iPhone development, i am developing an app were i have tableview with custom-cell,my custom-cell contains label and textfiled. this is my registration screen,How to save the data of my textfields and,how to do validations for the text. In the textfield endediting we can save the data. but if the user on the first filed enter name and then he click done button it will show please enter first name, because i am saving data in didendediting. i want to save the data when ever user is on the textfield.

Answer 1

you can use this method to trace your current textfield text, with the help of the model class objects to store your text.

- (BOOL)textField:(UITextField *)theTextField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    NSString *characterSet = nil; 
    switch (theTextField.tag) 
    {
        case 1:
            characterSet = @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ";
            [sharedInstance.registrationDetails setFirstName:theTextField.text];


            default:
            characterSet = @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789?/!@#$&*.,-:; _";
            break;
    }
    NSCharacterSet *myCharSet = [NSCharacterSet characterSetWithCharactersInString:characterSet];
    for (int i = 0; i < [string length]; i++)
    {
        unichar c = [string characterAtIndex:i];
        if (![myCharSet characterIsMember:c]) 
        {
            return NO;
        }
    }
    return YES;
}