如何在iPad弹出框内向工具栏添加按钮? [英] How do I add buttons to a toolbar within an iPad popover?

问题描述

希望这里的某人征服了这个，因为它使我发疯.我的应用程序包含一个用于输入和编辑信息的弹出窗口.我今天了解到，可以在弹出窗口的底部显示一个工具栏，这很棒-只是我一生都无法在该工具栏上显示任何按钮.我们从这里开始:

Hoping someone here has conquered this one 'cuz it's driving me crazy. My app includes a popover that is used to enter and edit information. I learned today that it's possible to show a toolbar at the bottom of the popover and that's great -- except that I cannot for the life of me get any buttons to show on said toolbar. Here's where we start:

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController: editorViewer];
//*** This makes the toolbar visible
[navigationController setToolbarHidden:NO animated:NO];
//*** Create a 'trash' button
UIBarButtonItem *trashButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target: nil action: @selector(deleteItem)]; 
//*** Create an array of buttons
NSArray *buttons = [NSArray arrayWithObjects: trashButton, nil];

我尝试了以下每个操作来添加按钮，但没有成功:

I've tried each of the following to add the button, with no success:

navigationController.toolbar.items = buttons;

和

[navigationController setToolbarItems: buttons]

和

[navigationController.toolbar setItems: buttons animated: NO];

我有一个很小的工具栏，没有按钮.

I get a pretty little toolbar, no buttons.

有什么想法我做错了吗?

Any idea of what I'm doing wrong?

推荐答案

虽然您确实在导航控制器上设置了工具栏的隐藏状态，但工具栏项却取自导航控制器的顶视图控制器的工具栏项目属性.

While you do set the toolbar hidden state on the navigation controller, the tool bar items are taken from the navigation controller's top view controller's toolbarItems property.

以您的情况

editorView.toolbarItems = buttons;

或

[editorView setToolbarItems:buttons];

同时

[navigationController setToolbarHidden:NO animated:NO];

保持不变.

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