Iphone 是否以编程方式将UIBarButtonim添加到UIToolbar？

这是我需要的

我的应用程序有免费版和付费版。加载付费版本时，我需要在UIToolBar上设置3个UIBarButton。当免费版本加载时，我需要4个UIBarButtons。在最右边的按钮上，我需要蓝色，而其余的默认为黑色。我假设它们之间有灵活的空间来平衡它们。我试着通过IB来实现这一点，但我似乎无法让它以正确的间距工作。如您所见，带有3个按钮的底部工具栏与工具栏的间距不均匀。（我希望以编程方式执行此操作）

---

首先在工具栏上添加购买按钮。结合并合成

if(AppPaid) { 
    NSMutableArray *items = [YourToolBar.items mutableCopy];
    [items removeObject:yourBuyButton];
    YourToolBar.items = items;
    [items release];
  }

像这样创建4个项目。。。提供指向您的xib的链接，以便我们可以在您需要时隐藏所需的

tabbarItem

。。。我希望这会有所帮助

UIToolbar* toolbar = [[UIToolbar alloc]
                  initWithFrame:CGRectMake(0, 0, 320, 45)];
[toolbar setBarStyle: UIBarStyleBlackOpaque];

// create an array for the buttons
NSMutableArray* BarbuttonsArray = [[NSMutableArray alloc] initWithCapacity:5];

// create a clearAll button
UIBarButtonItem * clearAllButton = [[UIBarButtonItem alloc] initWithTitle:@"Clear All" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(clearAllAction:)];

clearAllButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:clearAllButton];
[clearAllButton release];


 // create a calculate button
 UIBarButtonItem *calculateButton = [[UIBarButtonItem alloc]initWithTitle:@"Calculate" 
                             style:UIBarButtonItemStylePlain
                           target:self
                           action:@selector(calculateButton:)];
calculateButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:calculateButton];
[calculateButton release];


// create a settingButton
UIBarButtonItem *settingButton = [[UIBarButtonItem alloc]initWithTitle:@"Setting" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(settingButton:)];
settingButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:settingButton];
[settingButton release];


 // create a buyNowButton

UIBarButtonItem *buyNowButton = [[UIBarButtonItem alloc]initWithTitle:@"Buy Now" 
                             style:UIBarButtonItemStylePlain
                          target:self
                          action:@selector(buyNowButton:)];
buyNowButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:buyNowButton];
[buyNowButton release];


 // put the BarbuttonsArray in the toolbar and release them
[toolbar setItems:BarbuttonsArray  animated:NO];
[BarbuttonsArray  release];

// place the toolbar into the navigation bar
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:toolbar];
[toolbar release];


//before using these lines of code you have to alloc and make the property of   UINavigationController in your appDelegate

---

尝试使用此选项可能会帮助您在默认情况下将“购买”按钮添加到工具栏，并使用一些唯一的值（例如-1）对其进行标记，然后在运行时可以将其从工具栏中删除，如下所示：

#ifdef LITE_VERSION
    //Dont need to do anything, view is set up as lite version by default
#else

    NSArray *elements = toolBar.items;
    NSMutableArray *newElements = [[NSMutableArray alloc] initWithCapacity:[elements count]];

   for ( UIBarItem *item in elements )
   {
        if ( item.tag != -1 )
        {
            //Item is not the buy button, add it back to the array
            [newElements addObject:item];
        }
    }

    [toolBar setItems:newElements];

#endif

---

这是我在我的一个应用程序中已经使用的一些代码，在运行时用一个特定的按钮替换IB中标记为

-1

的项目，具体取决于显示的视图

我可以用一些代码来提高清晰度吗按钮看起来很漂亮是的，我尝试了这些代码。我无法使“YourToolBar”没有错误。我还是个新手。我在上面添加了我的代码，所有东西都是通过IB实现的，所以IBOutlet是唯一的选择。你可以看到我有多少按钮。我想如果你能解释一下我如何“连接”你代码中的“你的工具栏”部分，我想这就是我的问题所在。好的，我能够让它显示出来，但是这会将我的视图向下推，并将工具栏放在顶部，我需要它放在视图的顶部和底部。好的，我通过更改您的一些代码，在底部显示了UIToolBar。但是按钮之间应该有一些灵活的空格，所以当我移除一个按钮时，按钮甚至在工具栏上。没有灵活的空格吗？我建议一件事，只是在每个按钮之间放置FlexibleSpace按钮项。如果BUYNow按钮的LITE_版本不应添加到BarButtonItems数组中，则为其设置条件。

UIToolbar* toolbar = [[UIToolbar alloc]
                  initWithFrame:CGRectMake(0, 0, 320, 45)];
[toolbar setBarStyle: UIBarStyleBlackOpaque];

// create an array for the buttons
NSMutableArray* BarbuttonsArray = [[NSMutableArray alloc] initWithCapacity:5];

// create a clearAll button
UIBarButtonItem * clearAllButton = [[UIBarButtonItem alloc] initWithTitle:@"Clear All" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(clearAllAction:)];

clearAllButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:clearAllButton];
[clearAllButton release];


 // create a calculate button
 UIBarButtonItem *calculateButton = [[UIBarButtonItem alloc]initWithTitle:@"Calculate" 
                             style:UIBarButtonItemStylePlain
                           target:self
                           action:@selector(calculateButton:)];
calculateButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:calculateButton];
[calculateButton release];


// create a settingButton
UIBarButtonItem *settingButton = [[UIBarButtonItem alloc]initWithTitle:@"Setting" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(settingButton:)];
settingButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:settingButton];
[settingButton release];


 // create a buyNowButton

UIBarButtonItem *buyNowButton = [[UIBarButtonItem alloc]initWithTitle:@"Buy Now" 
                             style:UIBarButtonItemStylePlain
                          target:self
                          action:@selector(buyNowButton:)];
buyNowButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:buyNowButton];
[buyNowButton release];


 // put the BarbuttonsArray in the toolbar and release them
[toolbar setItems:BarbuttonsArray  animated:NO];
[BarbuttonsArray  release];

// place the toolbar into the navigation bar
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:toolbar];
[toolbar release];


//before using these lines of code you have to alloc and make the property of   UINavigationController in your appDelegate

#ifdef LITE_VERSION
    //Dont need to do anything, view is set up as lite version by default
#else

    NSArray *elements = toolBar.items;
    NSMutableArray *newElements = [[NSMutableArray alloc] initWithCapacity:[elements count]];

   for ( UIBarItem *item in elements )
   {
        if ( item.tag != -1 )
        {
            //Item is not the buy button, add it back to the array
            [newElements addObject:item];
        }
    }

    [toolBar setItems:newElements];

#endif