Question

我尝试添加我在Interface Builder中的HomeViewcontroller中链接的customView。这里是故事板的一个截图： How to use $http promise response outside success handler.

所有商店都与CarouselView 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 }}相关联。

这里的UIView文件（Interface Builder的screenShot中的Carousel View）：

CarouselScrollView.swift

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)
}}

这是我的ViewController，我在其中用3个CarouselView填充我的scrollView：

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

当我建立＆amp;运行就像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，因为评论）：

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

nil

我在控制台中出现此错误：

致命错误：在解包可选值时意外发现nil

我不明白为什么我的标签是{{1}}。一切似乎都好。有人有解决方案或想法吗？提前感谢您的时间和帮助。

Answer 1

如果您在setupView添加为子视图后致电carouselView，问题就会得到解决，因为只有在添加为子视图后，您的标签才会被初始化。

Answer 2

就像所说的Paramasivan Samuttiram一样，我必须在单独的Nib（.xib）文件中创建我的customView。我希望有另一个解决方案，以便能够将customView保留在我的故事板中（以保持它在我的HomeController上方）但是这样做了。

在CarouselView中我添加了这个：

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，我在func scrollViewSetup的循环中实例化了我的3个自定义视图：

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
}

现在一切正常。

感谢所有人，

在ScrollView中加载自定义UIView

2 个答案: