iPhone：是否可以隐藏和取消隐藏 UIACtionSheet 按钮？

Question

我在我的应用程序中使用 FBConnect。登录操作表按钮的标题是“登录 Facebook”和“注销 Facebook”，但我想显示“登录 Facebook”和“发布到 Facebook”。目前，它看起来像这样...

alt text http://freezpic.com/pics/6944f45f17ba4bbb8220637d5a00a1c6.jpg

...但我希望它看起来像这样...

替代文本 http: //www.freezpic.com/pics/93f28f4f9103f0842c849d7daa644f81.jpg

...可能在这些方法中设置：

- (void)session:(FBSession*)session didLogin:(FBUID)uid {

    //Show button log out

}

- (void)sessionDidLogout:(FBSession*)session {

    //show button log in
}

Edit01-来自答案注释的警报表代码：

 -(IBAction)mySheet:(id)sender { 
    UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"FaceBook" 
                                                      delegate:self 
                                             cancelButtonTitle:@"Cancel" 
                                        destructiveButtonTitle:nil 
                                             otherButtonTitles:@"Share On the Facebook" , 
                                                                @"Log in Facebook" ,
                                                                @"LogOut Facebook" ,nil]; 
    [menu showInView:self.view]; 
    [menu release]; 
}

Answer 1

当然，只需根据 Facebook 连接的状态显示仅包含这两个按钮的不同 UIActionSheet。

怎么样：

-(IBAction)mySheet:(id)sender
{
    if (alreadyLoggedInToFacebook) {
        UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"FaceBook"
            delegate:self  cancelButtonTitle:@"Cancel"
                destructiveButtonTitle:nil
                    otherButtonTitles: @"Share On the Facebook" ,  @"Log in Facebook" ,
                      @"LogOut Facebook" ,nil]; 
    } else {
        UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"FaceBook"
            delegate:self  cancelButtonTitle:@"Cancel"
                destructiveButtonTitle:nil
                    otherButtonTitles:  @"LogOut Facebook" ,nil]; 
    }
    [menu showInView:self.view]; 
    [menu release]; 
}

Answer 2

最后我实现了！ (alreadyLoggedInToFacebook) 必须是 (season.isConnect) 。每件事都很好！但还是有问题。登录后 - 注销并分享显示很棒，但效果不佳！这意味着如果用户点击注销按钮，登录窗口会再次出现！为什么 ？我认为，这是因为 FBLoginButton ，当删除此方法时，我的 UIActionSheet 不显示

！这是我的代码：

-(IBAction)mySheet:(id)sender
{
    if (session.isConnected) {
        UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"FaceBook"
                                                          delegate:self  cancelButtonTitle:@"Cancel"
                                            destructiveButtonTitle:nil
                                                 otherButtonTitles: @"Share On the Facebook" , @"Log out Facebook" ,nil]; 
        [menu showInView:self.view]; 
        [menu release]; 


    } else {



        UIActionSheet *menu2 = [[UIActionSheet alloc] initWithTitle:@"FaceBook"
                                                           delegate:self  cancelButtonTitle:@"Cancel"
                                             destructiveButtonTitle:nil
                                                  otherButtonTitles:  @"Log in Facebook" ,
                                nil]; 

        [menu2 showInView:self.view]; 
        [menu2 release]; 
    }
}


- (void)actionSheet:(UIActionSheet *)menu2 didDismissWithButtonIndex:(NSInteger)buttonIndex {

if (buttonIndex != [menu2 cancelButtonIndex]) 
    {

        FBLoginDialog* login = [[FBLoginDialog alloc] initWithSession:session];
        [login show];
        [login release];
    }

}

- (void)actionSheet:(UIActionSheet *)menu didDismissWithButtonIndex2:(NSInteger)buttonIndex {



    if (buttonIndex != [menu cancelButtonIndex]) 
    {
        [session logout];
    }

}