以编程方式在导航栏中嵌入分段控件答案

【问题标题】：programmatically embedding segmented control inside navigation bar以编程方式在导航栏中嵌入分段控件
【发布时间】：2017-09-08 23:03:22
【问题描述】：

我正在尝试以编程方式在导航栏中插入分段控件，但在导航栏中加载分段控制器时遇到了一些问题。我相信这很简单，但请参阅下面的代码。提前致谢！

var segmentedController: UISegmentedControl!

override func viewDidLoad() {
    super.viewDidLoad()

    navigationItem.titleView = segmentedController
    let items = ["Label A", "Label B"]
    segmentedController = UISegmentedControl(items: items)

    navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(handleSignOut))
    navigationItem.leftBarButtonItem?.tintColor = UIColor.black

}

【问题讨论】：

标签： swift xcode uisegmentedcontrol programmatically-created

【解决方案1】：

你应该在初始化后将segmentedController添加到导航栏！

var segmentedController: UISegmentedControl!

override func viewDidLoad() {
    super.viewDidLoad()

    let items = ["Label A", "Label B"]
    segmentedController = UISegmentedControl(items: items)
    navigationItem.titleView = segmentedController

    navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(handleSignOut))
    navigationItem.leftBarButtonItem?.tintColor = UIColor.black
}

【讨论】：