Change TextField focus after x # characters entered:

[Jack Fair_Weather]

Suppose I have 2 TextFields (TF1 and TF2). I want to automatically change the focus from TF1 to TF2 after the user has entered 3 characters into TF1.

This can be accomplished by responding to the shouldChangeCharactersInRange: message sent to the TextField's delegate.
//-------------------------------------------------------------------------
- (BOOL)textFieldUITextField *)textField shouldChangeCharactersInRange:
(NSRange)range replacementStringNSString *)string
{
if (range.location == 2)
{
TF1.text = [TF1.text stringByAppendingString:string];
[textField resignFirstResponder];
[TF2 becomeFirstResponder];
}
}
---------------------------------------------------------------------------
Say, for example, that the last character entered in FT1 is a "6".
The "6" is sent to this method in the string parameter and the fact that it is the 3rd character is recognized by range.location == 2. At this point I append the "6" to the first 2 characters. This works fine except for the fact that that 3rd character ("6") is loaded into TF2 along with the focus. I've worked through all of the TextField "Shoulds and Dids", but haven't been able prevent the last character being loaded into TF2. Nor have I been able to automatically delete it:

????? Thanks. Jack

[Jack Fair_Weather]

Originally Posted by Jack Fair_Weather

Suppose I have 2 TextFields (TF1 and TF2). I want to automatically change the focus from TF1 to TF2 after the user has entered 3 characters into TF1.

This can be accomplished by responding to the shouldChangeCharactersInRange: message sent to the TextField's delegate.
//-------------------------------------------------------------------------
- (BOOL)textFieldUITextField *)textField shouldChangeCharactersInRange:
(NSRange)range replacementStringNSString *)string
{
if (range.location == 2)
{
TF1.text = [TF1.text stringByAppendingString:string];
[textField resignFirstResponder];
[TF2 becomeFirstResponder];

return NO;
}
}
---------------------------------------------------------------------------
Say, for example, that the last character entered in FT1 is a "6".
The "6" is sent to this method in the string parameter and the fact that it is the 3rd character is recognized by range.location == 2. At this point I append the "6" to the first 2 characters. This works fine except for the fact that that 3rd character ("6") is loaded into TF2 along with the focus. I've worked through all of the TextField "Shoulds and Dids", but haven't been able prevent the last character being loaded into TF2. Nor have I been able to automatically delete it:

????? Thanks. Jack

OOOOPs....Easy to do. Just return NO

[djdeens]

	
	
 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{        
    NSString *strPassword = [textField.text stringByReplacingCharactersInRange:range withString:string];
    if( [strPassword length] > 0 ){ 
        textField.text = string;        
        UIResponder* nextResponder = [textField.superview viewWithTag:(textField.tag + 1)];
        if (nextResponder) {
            [nextResponder becomeFirstResponder];
        }        
        return NO;
    }    
    return YES;
}

Regards,
Danish Kharadi
Wizsoft Technologies
http://wwww.wizsoft.com.pk