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我尝试添加我的自定义视图，该视图在Interface Builder中的HomeViewcontroller中链接。这里有一个故事板的截图： 
在ScrollView中加载自定义UIView
所有插座都链接到CarouselView IBOutlets。
这里UIView的文件（木马查看Interface Builder中的截图）：
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
}}
这里我的ViewController，我填补我的滚动视图3轮播画面：
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)
}}
当我建立&像这样运行我可以滚动我的滚动视图（3 vi加入EWS），但没有标签（正常的，因为评论）：
但是，当我取消这些线路之一在我CarouselScrollView.swift文件：
// self.assignmentStatusLabel.text = status
// self.assignmentCustomerLabel.text = customer
// self.assignmentAgencyLabel.text = agency
// self.assignmentPeriodLabel.text = period
我有这个错误在控制台：
fatal error: unexpectedly found nil while unwrapping an Optional value
我不明白为什么我的标签是nil。一切似乎都好。有人有解决方案或想法？提前感谢您的时间和您的帮助。
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，问题不是这样。 –
也许你在'awakeFromNib'被调用之前使用了标签。 –