Question

我有一个tableView，用户可以在其中滑动（左）以删除数据条目。如果用户向左滑动，然后点击删除（或＆＃34;取消＆＃34;右），用户点击unwindSegueButton，AppDelegate中的应用程序崩溃。

崩溃发生在我正在倒带的viewController中。它完全加载，但随后崩溃。如果用户提交删除或＆＃34; unswipe＆＃34;首先，没有崩溃......

我该如何避免这种情况？我可以在准备翻译中做一些撤消左侧滑动吗？

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    let source = objectSample[indexPath.row].source.name

    return source == "MyApp"
}


   func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        let source = objectSample[indexPath.row].source.name
        //println(objectSample[indexPath.row].UUID)

            if (editingStyle == UITableViewCellEditingStyle.Delete) && (source == "MyApp") {
                let UUIDtoDelete = objectSample[indexPath.row].UUID
                println("Deleted entry: \(source)")
                deleteUUIDobject(UUIDtoDelete)
                objectSample.removeAtIndex(indexPath.row)
                tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)

            }else {
            println("Not allowed to delete, source: \(source)")
        }
    }

的AppDelegate

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    let isOnboarded = NSUserDefaults.standardUserDefaults().boolForKey("Onboarded")

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    // instantiate your desired ViewController
    let dashboardViewController = storyboard.instantiateViewControllerWithIdentifier("DashboardVC") as! UIViewController
    let onboardingViewControllerOne = storyboard.instantiateViewControllerWithIdentifier("OnboardingVCOne") as! UIViewController
    let navigationController = storyboard.instantiateViewControllerWithIdentifier("NavigationController") as! UINavigationController

    if (isOnboarded) {
            window!.rootViewController = navigationController 
        }else{
            window!.rootViewController = onboardingViewControllerOne
    }

    return true
}

Answer 1

我通过添加下面的代码解决了崩溃，但我希望我知道为什么崩溃发生在第一位。

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    self.tableView.setEditing(false, animated: true)
    }

unwindsegue - 应用程序崩溃（commitEditingStyle中断）？

1 个答案: