How can I make the Tab key move focus out of a NSTextView?

问题

I'm using an NSTextView to allow multi-line input. However, due to the nature of my app, users will be more comfortable moving to the next input element when they press TAB.

How can I make TAB exit the NSTextView, while keeping the newline behaviour of the Enter key?

回答1:

You could implement -textView:doCommandBySelector: in your text view's delegate:

- (BOOL)textView:(NSTextView *)aTextView doCommandBySelector:(SEL)aSelector {
    if (aSelector == @selector(insertTab:)) {
        [[aTextView window] selectNextKeyView:nil];
        return YES;
    }

    return NO;
}

See http://developer.apple.com/documentation/Cocoa/Reference/NSTextViewDelegate_Protocol

回答2:

You'll need to implement this in a subclass.

I wrote such a subclass for Translate Text. You're welcome to use it under its BSD license. Here's the header and the implementation file.

… while keeping the newline behaviour of the Enter key?

My main purpose was to send an action to a target when the user presses Enter, and I also have it drop focus from the view. However, both are explicit statements in the code; you can simply comment that code out or delete it.

来源：https://stackoverflow.com/questions/2484072/how-can-i-make-the-tab-key-move-focus-out-of-a-nstextview