不带tab键的控件之间的“tab”

对于非文本控件,您应该能够在响应器链的某个位置(例如,NSWindowController)使用类似的内容:

- (void)keyDown:(NSEvent *)event {
    NSWindow *window = [self window];

    switch ([[event characters] objectAtIndex:0]) {
        case NSUpArrowFunctionKey:
            [window makeFirstResponder:[[window firstResponder] previousValidKeyView]];
            break;
        case NSDownArrowFunctionKey:
            [window makeFirstResponder:[[window firstResponder] nextValidKeyView]];
             break;
       default:
            [super keyDown:event];
            break;
    }
}

在文本字段中,代表:

- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)command {
    NSWindow *window = [control window];

    if (command == @selector(moveUp:)) {
        [window makeFirstResponder:[[window firstResponder] previousValidKeyView]];
        return YES;
    } else if (command == @selector(moveDown:)) {
        [window makeFirstResponder:[[window firstResponder] nextValidKeyView]];
        return YES;
    }

    return NO;        
}

(文本视图委托也有类似的方法。)

告诉窗口使当前视图的下一个/上一个键视图成为第一个响应者。