How to restrict user for only IntegerValue in UITextfield for iPad/iPhone?


There are some situations where we required that User should input only numeric value like 0to9.In that kind of situation we have to use this tricks with UITextField’s delegate method.

– (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string  {

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];

[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];

NSNumber* candidateNumber;

NSString* candidateString = [textField.text stringByReplacingCharactersInRange:range withString:string];

range = NSMakeRange(0, [candidateString length]);

[numberFormatter getObjectValue:&candidateNumber forString:candidateString range:&range error:nil];

if (([candidateString length] > 0) && (candidateNumber == nil || range.length < [candidateString length]))


return NO;




return YES;



Day-12 for iOS development

Click here for Lecture 12 which Includes  UITextField , UITextView and  UIView Animation.