Ios 在ScrollView中加载自定义UIView

我尝试添加在Interface Builder的HomeViewcontroller中链接的自定义视图。下面是故事板的一个屏幕截图：

所有插座都链接到转盘视图

IBOutlets

这里是UIView文件（Interface Builder屏幕截图中的转盘视图）：

CarouselScrollView.swift

import UIKit

class CarouselView: UIView {
@IBOutlet weak var assignmentStatusLabel: UILabel!
@IBOutlet weak var assignmentCustomerLabel: UILabel!
@IBOutlet weak var assignmentAgencyLabel: UILabel!
@IBOutlet weak var assignmentPeriodLabel: UILabel!
@IBOutlet weak var nextAssignmentButton: UIButton!
@IBOutlet weak var previousAssignmentButton: UIButton!

init(frame: CGRect, _ status: String, _ customer: String, _ agency: String, _ period: String) {
    super.init(frame: frame)
    self.setupView("status", "customer", "agency", "period")
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

func setupView(_ status: String, _ customer: String, _ agency: String, _ period: String) {
    //        self.assignmentStatusLabel.text = status
    //        self.assignmentCustomerLabel.text = customer
    //        self.assignmentAgencyLabel.text = agency
    //        self.assignmentPeriodLabel.text = period
}}

这里是我的ViewController，我用3个旋转视图填充滚动视图：

import UIKit
class HomeViewController: BaseViewController, HomeView {

@IBOutlet weak var carouselScrollView: UIScrollView!
@IBOutlet weak var carouselView: CarouselView!

var presenter: HomePresenter?
var currentAssignmentView: Int = 0
// create array of assignments for test
let arrayOfAssignments = [["status":"Mission en cours", "customer":"customer1", "agency":"bourg", "startDate":"09-05-2016", "endDate":"10-05-2016"],
                          ["status":"Mission à venir", "customer":"customer2", "agency":"agency paris", "startDate":"09-01-2017", "endDate":"03-04-2017"],
                          ["status":"Mission passée", "customer":"customer3", "agency":"agency lyon", "startDate":"09-09-2017", "endDate":"29-05-2018"]
]

override func initPresenter() -> BasePresenter {
    let presenter = HomePresenter(self, Navigator(self))
    self.presenter = presenter
    return presenter
}

override func setup() {
    self.navBarTitleImageSetup()
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
        self.scrollViewSetup()
}

func scrollViewSetup() {
    let carouselScrollViewWidth:CGFloat = self.carouselScrollView.frame.width
    let carouselScrollViewHeight:CGFloat = self.carouselScrollView.frame.height
    let numberOfAssignments = self.arrayOfAssignments.count

    self.carouselScrollView.contentSize = CGSize(width: carouselScrollViewWidth * CGFloat(numberOfAssignments), height: carouselScrollViewHeight)
    for i in 0...numberOfAssignments - 1 {
        let carouselView = CarouselView(frame: CGRect(x: carouselScrollViewWidth * CGFloat(i), y: CGFloat(0), width: carouselScrollViewWidth, height: carouselScrollViewHeight), "iuhiuh", "oiojoij", "iuhiuh", "iuhiuhiuh")
        switch i {
        case 0:
            carouselView.backgroundColor = UIColor.blue
        case 1:
            carouselView.backgroundColor = UIColor.yellow
        case 2:
            carouselView.backgroundColor = UIColor.gray
        default:
            break
        }
        self.carouselScrollView.addSubview(carouselView)
    }
    self.carouselScrollView.delegate = self
}

func navBarTitleImageSetup() {
    let image: UIImage = #imageLiteral(resourceName: "NavLogo")
    let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 97, height: 24))
    imageView.contentMode = .scaleAspectFit
    imageView.image = image
    self.navigationItem.titleView = imageView
}}

extension HomeViewController: UIScrollViewDelegate {
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
    let viewWidth: CGFloat = self.carouselScrollView.frame.width
    let currentAssignmentNumber: CGFloat = floor((self.carouselScrollView.contentOffset.x - viewWidth/2)/viewWidth)+1
    self.currentAssignmentView = Int(currentAssignmentNumber)
}}

当我像那样构建和运行时，我可以滚动我的滚动视图（添加了3个视图），但没有标签（正常，因为已注释）：

但当我在CarouselScrollView.swift文件中取消注释其中一行时：

    //        self.assignmentStatusLabel.text = status
    //        self.assignmentCustomerLabel.text = customer
    //        self.assignmentAgencyLabel.text = agency
    //        self.assignmentPeriodLabel.text = period

我在控制台中遇到此错误：

致命错误：在展开可选值时意外发现nil

---

我不明白为什么我的标签是

nil

。一切似乎都很好。有人有解决方案或想法？。提前感谢您的时间和帮助。

如果在

旋转视图添加为子视图后调用
setupView
，问题将得到解决，因为只有在添加为子视图后，标签才会初始化。
如前所述，我必须在单独的Nib（.xib）文件中创建自定义视图。我希望有另一种解决方案，以便能够将customView保留在我的故事板中（使其刚好位于我的HomeController之上），但这成功了

在CarouselView中，我添加了以下内容：

class func instanceFromNib() -> UIView { return UINib(nibName: "CarouselView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! UIView }

现在，CarouselView文件如下所示：

class CarouselView: UIView {
@IBOutlet weak var assignmentStatusLabel: UILabel!
@IBOutlet weak var assignmentCustomerLabel: UILabel!
@IBOutlet weak var assignmentAgencyLabel: UILabel!
@IBOutlet weak var assignmentPeriodLabel: UILabel!
@IBOutlet weak var nextAssignmentButton: UIButton!
@IBOutlet weak var previousAssignmentButton: UIButton!

class func instanceFromNib() -> UIView {
    return UINib(nibName: "CarouselView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! UIView
}

override init(frame: CGRect) {
    super.init(frame: frame)
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}}

在HomeViewController中，我实例化了3个自定义视图，就像func scrollViewSetup中的循环中那样：

func scrollViewSetup() {
    let carouselScrollViewWidth:CGFloat = self.carouselScrollView.frame.width
    let carouselScrollViewHeight:CGFloat = self.carouselScrollView.frame.height
    let numberOfAssignments = self.arrayOfAssignments.count

    self.carouselScrollView.contentSize = CGSize(width: carouselScrollViewWidth * CGFloat(numberOfAssignments), height: carouselScrollViewHeight)
    for i in 0...numberOfAssignments - 1 {
        let carouselView = CarouselView.instanceFromNib() as! CarouselView
        carouselView.frame = CGRect(x: carouselScrollViewWidth * CGFloat(i), y: CGFloat(0), width: carouselScrollViewWidth, height: carouselScrollViewHeight)
        carouselView.assignmentStatusLabel.text = self.arrayOfAssignments[i]["status"]
        carouselView.assignmentCustomerLabel.text = self.arrayOfAssignments[i]["customer"]?.uppercased()
        carouselView.assignmentAgencyLabel.text = self.arrayOfAssignments[i]["agency"]?.uppercased()
        carouselView.assignmentPeriodLabel.text = "\(self.arrayOfAssignments[i]["startDate"]!)  -  \(self.arrayOfAssignments[i]["endDate"]!)"
        self.carouselScrollView.addSubview(carouselView)
    }
    self.carouselScrollView.delegate = self
}

现在一切都正常了

感谢所有人，
检查标签是否正确连接到Interface Builder中的插座。谢谢，但已经做了几次，问题并不是这样。可能您在调用
awakeFromNib
之前使用了标签。而不是在情节提要中创建自定义视图，尝试在单独的Nib文件中创建它们。Paramasivan Samuttiram我按照您的建议做了，但我希望有另一种解决方案，以便能够将customView保留在我的故事板中（使它正好位于我的HomeController之上）。然后在CarouselView中我添加了这个：类func instanceFromNib（）->UIView{return UINib（nibName:“CarouselView”，bundle:nil）。实例化（withOwner:nil，options:nil）[0]as！UIView}，在HomeViewController中我实例化了3个自定义视图，就像我的循环中那样：let CarouselView=CarouselView.instanceFromNib（）as！CarouselView谢谢，我怎么能不做两个循环而不是一个循环呢？而不是用户3057272如果您谈论的是“for”循环，那么您应该创建一个属性来跟踪它，可能是在“setupView”中