如何在 iOS 的导航栏中添加标准信息按钮?

问题描述

我想在导航栏中添加一个带有系统信息图标的右侧栏按钮.但是我看到 UIBarButtonSystemItem 没有提供这种类型的按钮.另一方面，所以我尝试使用 UIButtonType.infoLight 类型的 UIButton，但我不允许将它分配给 navigationItem.rightBarButtonItems.

I'd like to add a right bar button with the system's info icon to a navigation bar. But I see that UIBarButtonSystemItem does not provide such type of button. On the other hand, so I tried with a UIButton of type UIButtonType.infoLight, but I am not allowed to assign it to navigationItem.rightBarButtonItems.

有没有办法做到这一点?

Is there any way to do this?

推荐答案

这可以使用 .infoLight

let infoButton = UIButton(type: .infoLight)
infoButton.addTarget(self, action: #selector(infoButtonTapped), forControlEvents: .TouchUpInside)
let barButton = UIBarButtonItem(customView: infoButton)
self.navigationItem.rightBarButtonItem = barButton

或者:

通过将 infoImage 添加到您的 Asset catalog 并使用以下代码创建 barButtonItem

by adding infoImage to your Asset catalog and create barButtonItem using below code

let infoButton = UIBarButtonItem(image: UIImage(named: "infoImage"), style: .Plain, target: self, action: #selector(ViewController.infoButtonTapped))
self.navigationItem.rightBarButtonItem = infoButton

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