导航栏按钮未在 swift 3 中显示 [英] navigation bar button not showing in swift 3

问题描述

我们使用的是 xcode 8.0.我们面临自定义导航栏按钮项目的问题.自定义栏按钮未显示在导航中.

We are using xcode 8.0 . We are facing problem for custom navigation bar button item. Custom bar button not showing in navigation .

let button = UIButton.init(type: .custom)
        button.titleLabel?.text = "dsfjksdf"
        button.titleLabel?.textColor = UIColor.black;
        button.addTarget(self, action:#selector(GigDatesViewController.btnNext), for: UIControlEvents.touchUpInside)
        button.frame = CGRect.init(x: 0, y: 0, width: 30, height: 30)
        let barButton = UIBarButtonItem.init(customView: button)

        navigationItem.leftBarButtonItem = barButton

推荐答案

我确实尝试了您的代码，但我得到 barButton.title 为 nil 或空，因此您可以为按钮设置图像，例如:

I did try your code and I get barButton.title is nil or empty, so you can set image for button like:

button.setImage(UIImage(named: "image_name"), for: .normal)

现在您可以在 leftBarButtonItem 处看到图像.

Now you can see the image at the leftBarButtonItem.

如果您想在 leftBarButtonItem 中使用自定义文本，您可以使用:

If you want to use your custom text in the leftBarButtonItem you can use:

let barButton = UIBarButtonItem(title: "dsfjksdf", style: .plain, target: self, action: #selector(GigDatesViewController.btnNext))
navigationItem.leftBarButtonItem = barButton

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