Class 没有初始值设定项 (Xcode 6.3)

Question

更新到 Xcode 6.3 后尝试找出错误。我有一个 class 出现错误 'Class has no initializers' 谁能告诉我如何解决这个问题？

class TodayViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, BWWalkthroughViewControllerDelegate {


var events: [EKEvent] = []
let eventStore = EKEventStore()
var pttCalendar: EKCalendar?

let walkthroughVC : BWWalkthroughViewController?

@IBOutlet weak var tableView: UITableView!

var dateFormatter = NSDateFormatter()

override func viewDidLoad() {
    super.viewDidLoad()

    requestCalendarAccess()

    let firstLaunch = NSUserDefaults.standardUserDefaults().boolForKey("FirstLaunch")
    if firstLaunch  {
        println("Not first launch.")
    }
    else {
        showWalkthrough()
        println("First launch, setting NSUserDefault.")
        NSUserDefaults.standardUserDefaults().setBool(true, forKey: "FirstLaunch")
    }


    self.tableView.rowHeight = 50

    dateFormatter.dateFormat = "EE, MMM dd"
    let dateForLabel = dateFormatter.stringFromDate(NSDate())

    self.title = dateForLabel
}

Answer 1

您忘记了覆盖 func init()

Answer 2

您需要一个初始化程序来设置值

let walkthroughVC : BWWalkthroughViewController?

将其设置为 var 将消除错误。它当然会默认为 nil.

Class 没有初始值设定项 (Xcode 6.3)

Class has no initializers (Xcode 6.3)

xcode

swift

init