自訂圖片的UIBarButtonItem

//img: UIBarButtonItem 的圖片

//action: UIControlEventTouchUpInside selector

-(UIBarButtonItem *)customBarButtonItemWithImage:(UIImage *)img touchUpInsideSelector:(SEL)action

{

    UIBarButtonItem *result;

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 24, 24)];

    [button setBackgroundImage:img forState:UIControlStateNormal];

    //點擊時會跟 SystemButtonItem 發光

    [button setShowsTouchWhenHighlighted:YES];

    [button addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];

    result = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

    [button release];

    

    return result;

}

如何取得Keyboard Rect

註冊 keyboard 通知 

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];  

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];