問題描述
我正在使用 XCode 4 和故事板我正在創(chuàng)建的應(yīng)用程序，但是我無法直觀地修改 UIToolbar.
I'm using XCode 4 and storyboarding an application I'm creating, however I cannot visually modify the UIToolbar.
我正在嘗試修改 UITableViewController 內(nèi)部的 UIToolbar - 但是我必須將 UIToolbar 放置在正確的層次結(jié)構(gòu)之外，以便能夠在視覺上對其進行修改.我試過把它放在視圖控制器區(qū)域，但這并沒有讓它顯示出來.
I'm attempting to modify a UIToolbar that is inside of a UITableViewController - however I have to place the UIToolbar out of the correct hierarchy in order to be able to modify it visually. I've tried placing it onto the view controller area but that does not make it show up.
在某一時刻，我能夠讓它出現(xiàn)在下面，因為它是自己的對象，但是我無法重新創(chuàng)建它.
At one point I was able to make it appear below, as it's own object however I was not able to recreate that.
一旦我能夠讓它看起來像這樣
Once I was able to get it to look like this
推薦答案
你的 UITableViewController 在一個 UINavigationController 里面，它已經(jīng)有自己的 UIToolbar——你不需要將一個新的拖入你的視圖層次結(jié)構(gòu)中.Interface Builder 可以在 Inspector 面板的Simulated Metrics"下為您模擬工具欄.
Your UITableViewController is inside a UINavigationController, which already has its own UIToolbar—you don't need to drag a new one into your view hierarchy. Interface Builder can simulate the toolbar for you under "Simulated Metrics" in the inspector panel.
一旦模擬工具欄可見，只需將 UIBarButtonItem 拖入其中.如果您需要比按鈕或間隔更復(fù)雜的東西，請使用帶有自定義視圖的自定義項.
Once the simulated toolbar is visible, simply drag UIBarButtonItems into it. Use a custom item with a custom view if you need anything more complicated than a button or spacer.
如果您需要您的工具欄項目需要是動態(tài)的，您可以通過 IBOutlet 維護一個引用，而不必將它們放在您的視圖中.然后設(shè)置 UITableViewController 的 toolbarItems 屬性或在運行時調(diào)用 -setToolbarItems:animated: 以顯示相應(yīng)的項目.
If you need your toolbar items need to be dynamic, you can maintain a reference via IBOutlets without necessarily having them in your view. Then set your UITableViewController's toolbarItems property or call -setToolbarItems:animated: at runtime to display the appropriate items.
參見 Apple 的 UINavigationController 類參考:顯示工具欄.
See Apple's UINavigationController Class Reference: Displaying a Toolbar.
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