如何将两个 UIBarButtonItem 添加到 UINavigationItem？

发布于 2024-09-04 13:16:37 字数 62 浏览 3 评论 0原文

我想要 UINavigationBar 上有两个 rightBarButtonItem。我怎样才能做到这一点？

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当梦初醒 2024-09-11 13:16:37

您可以将 UISegmentedControl 与两个按钮并将其配置为 momentary 属性设置为 YES。

这是邮件应用程序中用于转到下一条/上一条消息的内容。

更新

为了分配 UISegmentedControl]1 作为右键，您必须将其包装在 UIBarButtonItem 内（示例代码取自导航栏示例应用程序）：

- (void)viewDidLoad
{
    // "Segmented" control to the right
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:
                                                [NSArray arrayWithObjects:
                                                    [UIImage imageNamed:@"up.png"],
                                                    [UIImage imageNamed:@"down.png"],
                                                 nil]];
    [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    segmentedControl.frame = CGRectMake(0, 0, 90, kCustomButtonHeight);
    segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
    segmentedControl.momentary = YES;

    UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];
    [segmentedControl release];

    self.navigationItem.rightBarButtonItem = segmentBarItem;
    [segmentBarItem release];
}

You can use a UISegmentedControl with two buttons and configure it with the momentary property set to YES.

This is what is used in the Mail application to go to next/previous message.

Update

In order to assign the UISegmentedControl]1 as a right button, you have to wrap it inside a UIBarButtonItem (sample code taken from the NavBar sample application):

- (void)viewDidLoad
{
    // "Segmented" control to the right
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:
                                                [NSArray arrayWithObjects:
                                                    [UIImage imageNamed:@"up.png"],
                                                    [UIImage imageNamed:@"down.png"],
                                                 nil]];
    [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    segmentedControl.frame = CGRectMake(0, 0, 90, kCustomButtonHeight);
    segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
    segmentedControl.momentary = YES;

    UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];
    [segmentedControl release];

    self.navigationItem.rightBarButtonItem = segmentBarItem;
    [segmentBarItem release];
}

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