Question

我收到线程1：appDelegate上出现信号SIGABRT错误，我认为这是因为我一直试图通过facebook sdk连接到我的xcode项目的facebook登录按钮。我不知道我通过插座连接Facebook登录按钮的方式是否正确。因为起初，当我通过添加？避免它时，它给了我可选展开的错误。在下面的代码

中

fbloginbtnview?.delegate = self
fbloginbtnview?.permissions = ["email"]

现在我收到信号SIGABRT错误。我一直在看所有教程并阅读关于stackoverflow的所有问题，但是找不到任何有用的方法来连接Facebook登录按钮，因为所有可用的帮助要么是swift和xcode的较早版本，要么是我没有得到我想要的。我的迅速版本是5，xcode 9.3 任何人都可以给我正确的代码来连接一个Facebook登录按钮吗？

这是appdelegate

import UIKit
import Firebase
import CoreData
import FirebaseAuth
import FacebookCore
import FBSDKCoreKit
import FBSDKLoginKit


@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {


    var window: UIWindow?

    //below for fb sdk

    //....

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        ApplicationDelegate.shared.application(application, didFinishLaunchingWithOptions: launchOptions)

        return true
    }

//....

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any]) -> Bool {
    guard let urlScheme = url.scheme else { return false }
    if urlScheme.hasPrefix("fb") {
        return ApplicationDelegate.shared.application(app, open: url, options: options)
    }
    return true
}

//  above for fb sdk nothing


//
func applicationWillResignActive(_ application: UIApplication) {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}

func applicationDidEnterBackground(_ application: UIApplication) {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

func applicationWillEnterForeground(_ application: UIApplication) {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}

func applicationDidBecomeActive(_ application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

func applicationWillTerminate(_ application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    // Saves changes in the application's managed object context before the application terminates.
    self.saveContext()
}

// MARK: - Core Data stack

lazy var persistentContainer: NSPersistentContainer = {
    /*
     The persistent container for the application. This implementation
     creates and returns a container, having loaded the store for the
     application to it. This property is optional since there are legitimate
     error conditions that could cause the creation of the store to fail.
    */
    let container = NSPersistentContainer(name: "LetsGoTogether")
    container.loadPersistentStores(completionHandler: { (storeDescription, error) in
        if let error = error as NSError? {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.

            /*
             Typical reasons for an error here include:
             * The parent directory does not exist, cannot be created, or disallows writing.
             * The persistent store is not accessible, due to permissions or data protection when the device is locked.
             * The device is out of space.
             * The store could not be migrated to the current model version.
             Check the error message to determine what the actual problem was.
             */
            fatalError("Unresolved error \(error), \(error.userInfo)")
        }
    })
    return container
}()

// MARK: - Core Data Saving support

func saveContext () {
    let context = persistentContainer.viewContext
    if context.hasChanges {
        do {
            try context.save()
        } catch {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
            let nserror = error as NSError
            fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
        }
    }
}

}

这是我的View控制器代码

import UIKit
import Firebase
import FBSDKLoginKit
import FacebookCore

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate, LoginButtonDelegate {

    @IBOutlet var fbloginbtnview: FBLoginButton!

    override func viewDidLoad() {
        super.viewDidLoad()

        // fb

    fbloginbtnview?.delegate = self
        fbloginbtnview?.permissions = ["email"]                        
    }

    func loginButton(_ loginButton: FBLoginButton, didCompleteWith result: LoginManagerLoginResult?, error: Error?) {
        if let error = error {
            print("error took place\(error.localizedDescription)")
            return
        }
        print("Success")
    }

    func loginButtonDidLogOut(_ loginButton: FBLoginButton) {
        print("user signed out")
    }

}

Answer 1

您已将fbloginbtnview声明为隐式可选，这是正常的，但意味着它被认为是有效的。如果尚未将插座连接到界面生成器中的实际按钮（或正确类型的按钮），则对它的引用将失败。

线程1：信号SIGABRT

1 个答案: