On Aug 2, 2015, at 7:29 PM, Graham Cox <[email protected]> wrote:
> I have a series of NSTextFields and I want to automatically move the keyboard
> focus to the ‘next’ field when the one preceding it has a certain number of
> characters entered. My code is:
>
> - (void) controlTextDidChange:(NSNotification*) obj
> {
> NSTextField* control = [obj object];
>
> NSString* text = [control stringValue];
>
> if([text length] >= 4 )
> {
> NSString* shortStr = [[text substringToIndex:4]
> uppercaseString];
> [control setStringValue:shortStr];
>
> NSResponder* nextField = [control nextKeyView];
>
> NSLog(@"got 4 characters: '%@', moving to field: %@", shortStr,
> nextField );
>
> [[self window] makeFirstResponder:nextField];
> }
> }
You can try [[self window] selectKeyViewFollowingView:control] instead.
If that doesn't work, you can try [control.currentEditor
tryToPerform:@selector(insertTab:) with:self].
> … the code does what it should, detecting the string length and calling
> -makeFirstResponder when it gets a length of 4 or more …
>
> The current field does lose focus, but the next field never gains it, so the
> flow of text entry from field to field doesn’t occur as it should. Also, even
> though the first field is set as the window’s initialFirstResponder, and does
> get the keyboard focus ring, the actual field editor isn’t ready and typing
> just produces a beep - the user has to click in the field to make it accept
> text. These probems may well be related.
Are you certain the window is key? Does your app do anything unusual with
activationPolicy or activation, generally?
Regards,
Ken
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