在UINavigationbar中显示计数器等通知徽章 [英] Displaying notification badge like counter in UINavigationbar

问题描述

我要求在iPhone导航栏中显示待处理通知的数量。外观应该与通知徽章的外观相似 - 但这些不是APNS通知。它们是从具有类似目的的私人服务器发送的。

I have a requirement to display number of pending notifications in iPhone navigation bar. The appearance should be like that of notification badge - but these are not APNS notifications. They are the ones sent from private server with similar purpose.

我尝试添加右/左按钮（ UIBarButtonItem ）在我的 UINavigationbar 中，但它看起来非常严格。我无法设置其宽度，字体等。请参阅我的代码：

I tried adding a right/left button (UIBarButtonItem) in my UINavigationbar but it seems like it is very rigid in appearance. I can't set its width, fonts etc. See my code:

  self.notifButton = [[UIBarButtonItem alloc] initWithTitle:@"0" style:
                    UIBarButtonItemStyleBordered target:self action:@selector(TouchNotif)];

 NSMutableArray *items = [[NSMutableArray alloc] init];

 [items addObject:self.notifButton];
 self.navigationItem.rightBarButtonItems = items;

由于项目数组中还添加了其他2项，因此导航栏会混乱。他们的字体，宽度等我不能玩，或者我不知道应该怎么创建它们。

Because of other 2 items also added to items array, navbar is cluttered. Their fonts, width etc I cannot play with, or maybe I don't know how should I create them.

我的问题：

1）在导航栏右侧区域内容纳至少3个项目的正确方法是什么？我问这个是因为我找不到一种方法来玩我使用的 UIButtons 的宽度和字体。

1) What is proper way to accommodate at least 3 items in navbar right area? I am asking this because I don't find a way to play with width and font of the UIButtons I use.

2）如果我想为我的通知按钮设置自定义外观（就像通知徽章一样） - 是否有任何指示我如何制作它？要使用哪个控件，如何设置其框架和字体将在 UINavigationBar 中设置？

2) If I want to have custom appearance for my notification button (just like notification badge) - are there any pointers how do I make it? Which control to use, how to set its frame and font which will be allowed within UINavigationBar?

请帮忙。

推荐答案

您需要创建一个包含自定义视图的 UIBarButtonItem initWithCustomView 。
自定义视图可以是自定义UIButton，其中数字徽章为子视图。使用此自定义视图，您还可以控制按钮的宽度。

You need to create a UIBarButtonItem that contains a custom view using initWithCustomView. The custom view could be a custom UIButton with a number badge as subview. With this custom view you can also control the width of the buttons.

没有公共API可以直接创建通知徽章。如果是标签栏项目，您可以使用属性 badgeValue 设置徽章，但不能使用 UIBarButtonItem 。
在这里，你需要使用这个开源控件： MKNumberBadgeView 。

There is no public API to create a notification badge directly. In case of a tab bar item you could set a badge using the property badgeValue - but not with UIBarButtonItem. Here you need to use this open source control: MKNumberBadgeView.

请注意，自iOS 5起，属性 rightBarButtonItems 可用。
如果您只需要一个项目集改为 rightBarButtonItem 。

Note that the property rightBarButtonItems is available since iOS 5. If you only need one item set the rightBarButtonItem instead.

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