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如何在iOS中的导航栏中添加标准信息按钮?

[英]How to add a standard info button to a navigation bar in iOS?

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。 但我发现UIBarButtonSystemItem不提供这种类型的按钮。 另一方面,我尝试使用UIButton类型的UIButtonType.infoLight ,但我不允许将它分配给navigationItem.rightBarButtonItems

有没有办法做到这一点?

这可以使用.infoLight类型的UIButton对象来实现

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并使用下面的代码创建barButtonItem

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

您可以使用自定义视图初始化UIBarButtonItem

let button = UIButton(type: .infoLight)
let barButton = UIBarButtonItem(customView: button)

Swift 5.0

override func viewDidLoad() {
    super.viewDidLoad()

    let infoButton = UIButton(type: .infoLight)
    infoButton.addTarget(self, action: #selector(infoButtonTapped), for: .touchUpInside)
    navigationItem.rightBarButtonItem = UIBarButtonItem(customView: infoButton)
}

@objc func infoButtonTapped() {}

我找到了一种使用Interface Builder将信息图标添加到导航栏的更简单方法。

  1. 不要将栏按钮项添加到导航栏
  2. 向UIView添加一个按钮
  3. 将按钮类型更改为Info Light
  4. 将按钮拖放到导航栏的右上角。 这是全部。 条形按钮项目将自动出现,添加的信息按钮将位于条形按钮项目下(然后,像往常一样对按钮执行操作)

将infoButton图像添加到资源中,并通过提供名称将其设置为barButton。

UIBarButtonItem *item = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"infoImage.png"] style:UIBarButtonItemStyleDone target:self action:@selector(barButtonAction)];

    self.navigationItem.rightBarButtonItem = item;

在斯威夫特

  let item = UIBarButtonItem(image: UIImage(named: "infoImage.png"), style: .Plain, target: self, action: #selector(barButtonAction))

        self.navigationItem.rightBarButtonItem = item
UIButton *doneBtn = [[UIButton alloc] initWithFrame...];
[doneBtn setTitle:@"Submit" forState:UIControlStateNormal];
doneBtn.titleLabel.font = [UIFont systemFontOfSize: 14.0];
[doneBtn addTarget:self action:@selector(doSubmit:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithCustomView:doneBtn];
self.navigationItem.rightBarButtonItem = rightButton;

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