CODEWITHSUNDEEP
iosuitextfield
user3032304
user3032304

Reputation: 11

Allowing pasting of numbers only from an alphanumeric in a textfield

I want the textfield to allow the user to paste only numbers from the alphanumeric text and the same should be displayed.I have already dealt with the keypad part.I have tried the delegate method but it restricts the text altogether ,if it contains any alphabet ,which is not my requirement. I have gone through the discussions but couldn't find what i was looking for.Suggestions please!!

Upvotes: 1

Views: 259

Answers (3)

Praveen Matanam
Praveen Matanam

Reputation: 2803

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

NSCharacterSet *characterSet = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789"] invertedSet];

NSString *filtered = [[string componentsSeparatedByCharactersInSet:characterSet] componentsJoinedByString:@""];

textField.text = filtered;

return NO;

}

Upvotes: 0

Kalpesh
Kalpesh

Reputation: 5334

Try this

Make a macro

#define ACCEPTABLE_CHARECTERS @"0123456789."

And use it

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

if (textField==textFieldAmount)
{
    NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:ACCEPTABLE_CHARECTERS] invertedSet];

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

    return [string isEqualToString:filtered];
}
return YES;
}

Upvotes: 1

Pradhyuman sinh
Pradhyuman sinh

Reputation: 3928

Check Your textfield containing only numbers or not by using below code : 

 BOOL valid;
 NSCharacterSet *alphaNums = [NSCharacterSet decimalDigitCharacterSet];
 NSCharacterSet *inStringSet = [NSCharacterSet characterSetWithCharactersInString:myInputField.text];
 valid = [yourTextFieldText isSupersetOfSet:inStringSet];    
 if (!valid)
 {
       // Not numeric
 }
 else
 {
      //valid number
 }

Upvotes: 0

Related Questions