iOS 8上的Facebook登录； 登录切换后，应用无法运行

Question

我正在使用最新的FBSDKLoginKit（4.10.1）让我的用户通过Facebook进行身份验证。 它可以在iOS 9上完美运行，但不能在iOS 8上正常运行。当用户进行身份验证时，该应用程序切换到本机Facebook应用程序或野生动物园以登录。登录后，该应用程序切换回我的应用程序，但是什么也没有发生。 处理程序块未执行。 完全相同的代码可以在iOS 9上运行，但不能在8上运行。我注意到，当我的应用切换到Safari进行身份验证时，xcode的调试器会与模拟器分离； 所以我找不到任何错误。 在iOS 9上不会发生这种情况。

这是我要登录的代码：

@IBAction func login(sender: AnyObject) {

    let facebookLogin = FBSDKLoginManager()

    facebookLogin.logInWithReadPermissions(["public_profile", "email", "user_friends"], fromViewController: self, handler: {
        (facebookResult, facebookError) -> Void in

        // some logic which isn't executed
    })
}

这是我的info.plist：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>en</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>$(PRODUCT_NAME)</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string>0.1</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>fb190918247921312</string>
            </array>
        </dict>
    </array>
    <key>CFBundleVersion</key>
    <string>5</string>
    <key>FacebookAppID</key>
    <string>190918247921312</string>
    <key>FacebookDisplayName</key>
    <string>RegelBaas</string>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>NSAppTransportSecurity</key>
    <dict>
        <key>NSExceptionDomains</key>
        <dict>
            <key>akamaihd.net</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
            <key>facebook.com</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
            <key>fbcdn.net</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
                <false/>
            </dict>
        </dict>
    </dict>
    <key>UIAppFonts</key>
    <array>
        <string>Stackyard_PERSONAL_USE.ttf</string>
    </array>
    <key>UIApplicationExitsOnSuspend</key>
    <true/>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIMainStoryboardFile</key>
    <string>Main</string>
    <key>UIRequiredDeviceCapabilities</key>
    <array>
        <string>armv7</string>
    </array>
    <key>UISupportedInterfaceOrientations</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
    </array>
    <key>LSApplicationQueriesSchemes</key>
    <array>
        <string>fbapi</string>
        <string>fbapi20130214</string>
        <string>fbapi20130410</string>
        <string>fbapi20130702</string>
        <string>fbapi20131010</string>
        <string>fbapi20131219</string>
        <string>fbapi20140410</string>
        <string>fbapi20140116</string>
        <string>fbapi20150313</string>
        <string>fbapi20150629</string>
        <string>fbauth</string>
        <string>fbauth2</string>
        <string>fb-messenger-api20140430</string>
    </array>
</dict>
</plist>

这是我的appdelegate：

//
//  AppDelegate.swift
//  RegelBaas
//
//  Created by J. Weijland on 12-12-15.
//  Copyright © 2015 J. Weijland. All rights reserved.
//

import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
import Batch

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

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

        UINavigationBar.appearance().barTintColor = UIColor(red: 1.0, green: (102/255), blue: (102/255), alpha: 1)

        UINavigationBar.appearance().tintColor = UIColor.whiteColor()

        FBSDKApplicationDelegate.sharedInstance()
            .application(application, didFinishLaunchingWithOptions: launchOptions)

        return true
    }

    func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool
    {
        return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
    }

    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.
        FBSDKAppEvents.activateApp()
    }

    func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject])
    {

    }
}

我猜我的appdelegate出了点问题，因为我认为我的应用无法识别从Safari / FB本机向我的应用的反向切换。 奇怪的是，一切在iOS 9中都可以正常工作！

• “在iOS 9上工作”是指它可以在iOS 9上的设备上运行。我正在使用iOS SDK 9.2进行编译。

Answer 1

正如我在上面的评论中所述：

（是的）我从plist中删除了UIApplicationExitsOnSuspend。 每当应用程序切换到Safari并返回时，此行都会使我的应用程序“重置”。 这就是调试器也脱离的原因。