UIKeyCommand自定义键盘

有时候给自己的程序添加一些自定义的快捷键也是有必要的，在需要添加快捷键的viewController里面添加

-(BOOL)canBecomeFirstResponder{

    return YES;

}

-(NSArray *)keyCommands{

//组合键

    return@[[UIKeyCommandkeyCommandWithInput:UIKeyInputEscapemodifierFlags:UIKeyModifierShiftaction:@selector(escapeShiftKeyPressed:)]];

}

-(void)escapeShiftKeyPressed:(UIKeyCommand *)keyCommand{

    UIAlertView *alertView = [[UIAlertViewalloc] initWithTitle:@"UIKeyCommand Demo"message:[NSStringstringWithFormat:@"%@ pressed", keyCommand.input]delegate:nilcancelButtonTitle:@"Ok"otherButtonTitles:nil];

    [alertViewshow];

}