如何确定我的SIGTrap崩溃的原因？

我的团队最近发布了一个应用程序，其中发现了这些相对简单的应用程序，因为这是一个问题，即在违规函数中找到一个不良的强制转换或隐式解包的可选设置为nil . 这次虽然我找不到那种东西 . 我最好的猜测是，由于日历错误，可能其中一个 TimeBlock 对象或其属性为零 .

我们的应用程序是一个 Session 组织者，根据FreeTime，Conflicts和Meeting TimeBlocks 向用户显示他们的原生iOS日历事件 . 我可以访问几个崩溃用户的日历 .

Apple SigTrap Definition

如果在运行时遇到意外情况，Swift代码将以此异常类型终止，例如：具有nil值的非可选类型，强制类型转换失败

Crashing Function

/**
    Updates the conflictHours and meetingHours according to the timeblocks
    it is used as quick light reference to the button
 */
func updateTimeHours(timeblocks : [Timeblock]) {
    for timeblock in timeblocks {
        switch timeblock {
        case is MeetingTimeblock:
            for i in timeblock.startHour...timeblock.endHour {
                self.meetingHours[i] = true
            }
            break
        case is ConflictTimeblock:
            for i in timeblock.startHour...timeblock.endHour {
                self.conflictsHours[i] = true
            }
            break
        default: break
        }
    }
    updateButtonByOffset(offset: self.scrollTimeline.contentOffset.x)
}

Call of Crashing Function

/**
    This function inits the variables and button layout according to the timeblocks
 */
func handleTimeblocksDependantComponents() {
    buttonLayout()
    guard Scheduler.sharedInstance.timelines.count > SharedGlobals.Calendar.TODAY_INDEX else {
        return
    }
    updateTimeHours(timeblocks : (Scheduler.sharedInstance.timelines[SharedGlobals.Calendar.TODAY_INDEX].timeblocks))
}

SetHeaderHeight

/**
 Adjusts the height of the header depending on whether there are hosted meetings or 
 meeting VIP's or not.
*/
private func setHeaderHeight() {
    self.tableView.tableHeaderView = self.headerView
    let hostedMeetings = OverviewInteractor.getHostedMeetings(dayIndex: SharedGlobals.Calendar.SELECTED_DAY)
    let vips = OverviewInteractor.getVIPS(dayIndex: SharedGlobals.Calendar.SELECTED_DAY)

    self.tableView.beginUpdates()
    if let headerView = self.tableView.tableHeaderView {
        var height = 360.0
        if(vips.count == 0) { height -= 80.0 }
        if(hostedMeetings.count == 0) { height -= 80.0 }
        headerView.frame.size.height = CGFloat(height)
    }
    self.tableView.endUpdates()

}

TimeBlock Definition

// The Timeblock parent class. It simply holds a start and end time and provides its own duration. Not to be used as such
public class Timeblock {
    public let startTime: Date
    public let endTime: Date

    /// Returns the hour the Timeblock starts, in current timezone
    public var startHour: Int {
        get {
            return Calendar.current.component(.hour, from: startTime)
        }
    }

    /// Returns the hour the Timeblocks ends, in current timezone
    public var endHour: Int {
        get {
            return Calendar.current.component(.hour, from: endTime)
        }
    }

    /// Returns the minutes the Timeblocks starts
    public var startMinutes: Int {
        get {
            return Calendar.current.component(.minute, from: startTime)
        }
    }

    /// Returns the minutes the Timeblocks ends
    public var endMinutes: Int {
        get {
            return Calendar.current.component(.minute, from: endTime)
        }
    }

    /**
        Initialises the instance with a start and end time
        - Parameters:
            - startTime: The start time of the timeblock
            - endTime: The end time of the timeblock
    */
    public init(startTime: Date, endTime: Date) {
        self.startTime = startTime
        self.endTime = endTime
    }

    /**
        Provides the Timeblock's duration in the form of a DateInterval
        - warning: Only available on iOS 10.0 and up
        - returns: A DateInterval of the duration of the Timeblock
    */
    @available(iOS 10.0, *)
    public func getTimeInterval() -> DateInterval {
        return DateInterval(start: self.startTime, end: self.endTime)
    }

    /**
        Provides the Timeblock's duration in the form of a `Double` (number of seconds)

        - returns: The number of seconds that this Timeblock goes on for
    */
    public func getDuration() -> Double {
        return self.endTime.timeIntervalSince(self.startTime)
    }

}

Crash Report

事件标识符：98D4F477-C57B-4767-B957-E9EA2E0EE3EA CrashReporter密钥：0000000000000000000000000000000000000000硬件型号：undefined进程：xxxxxxx [784]标识符：com.xxx.xxx.xx.xxxxxxx版本：4.0.3代码类型：arm64日期/时间：Sun Dec 24 2017 09:55:23 GMT 0000（GMT）发布时间：无效日期操作系统版本：undefined 11.0.3（15A432）报告版本：105异常类型：SIGTRAP异常子类型：undefined线程0名称：线程0崩溃： 0 CallIn 0x0000000102c224e4专用TimelineHeader.updateTimeHours（timeblocks :)（TimelineHeader.swift：0）1 CallIn 0x0000000102c20af0 TimelineHeader.handleTimeblocksDependantComponents（）（TimelineHeader.swift：0）2 CallIn 0x0000000102c7a28c专用MeetingTableViewController.tableView（：viewForHeaderInSection :)（TimelineHeader.swift： 78）3 CallIn 0x0000000102c75d54 @objc MeetingTableViewController.tableView（：viewForHeaderInSection :)（MeetingTableViewController.swift：0）4 UIKit 0x000000018d1157d8 - [UITableView _delegateViewForHeaderIn部分：]（UIKit）5 UIKit 0x000000018d11def0 96- [UITableView _sectionHeaderView：withFrame：forSection：floating：reuseViewIfPossible：willDisplay：] _ block_invoke（UIKit）6 UIKit 0x000000018cdf1a14 [UIView（Animation）performWithoutAnimation：]（UIKit）7 UIKit 0x000000018d11dc60 - [UITableView _sectionHeaderView：withFrame：forSection：浮动：reuseViewIfPossible：willDisplay：]（UIKit的）8的UIKit 0x000000018cfc6c04 - [_ UITableViewUpdateSupport（私人）_setupAnimationsForExistingHeadersAndFooters]（UIKit的）9的UIKit 0x000000018cfc1070 - [_ UITableViewUpdateSupport _setupAnimations]（UIKit的）10的UIKit 0x000000018cfc0944 - [UITableView的_updateWithItems：updateSupport ：]（UIKit）11 UIKit 0x000000018cfa8448 - [UITableView endCellAnimationsWithContext：]（UIKit）12 UIKit 0x000000018cfa46e4 - [UITableView endUpdates]（UIKit）13 CallIn 0x0000000102c761a4 MeetingTableViewController.setHeaderHeight（）（MeetingTableViewController.swift：398）14 CallIn 0x0000000102c7a7c8专用闭包＃1在MeetingTableViewController.re中freshTable（:)（MeetingTableViewController.swift：513）15 CallIn 0x0000000102c7aacc部分申请MeetingTableViewController.refreshTable（_ :)中的闭包＃1（MeetingTableViewController.swift：0）16 CallIn 0x0000000102cd17f0 thunk for @callee_owned（） - >（）（LoginPageViewController） .swift：0）17 libdispatch.dylib 0x000000018327ea54 _dispatch_call_block_and_release（libdispatch.dylib）18 libdispatch.dylib 0x000000018327ea14 _dispatch_client_callout（libdispatch.dylib）19 libdispatch.dylib 0x000000018328b698 _dispatch_main_queue_callback_4CF $ $ VARIANT MP（libdispatch.dylib）20的CoreFoundation 0x00000001838aa544 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE（的CoreFoundation）21 CoreFoundation 0x00000001838a8120 __CFRunLoopRun（CoreFoundation）22 CoreFoundation 0x00000001837c7e58 CFRunLoopRunSpecific（CoreFoundation）23 GraphicsServices 0x0000000185674f84 GSEventRunModal（GraphicsServices）24 UIKit 0x000000018ce4767c UIApplicationMain（UIKit）25 CallIn 0x0000000102c02c08 main（AppDelegate.swif） t：18）26 libdyld.dylib 0x00000001832e456c start（libdyld.dylib）