ios - 尝试访问 iOS 10 中的联系人框架时崩溃

Question

我正在尝试访问联系人框架，以便将新联系人保存到用户地址簿中。我有以下代码...

import Contacts
import ContactsUI

在文件的头部并包含一个方法...

func requestForAccess(completion: (granted: Bool) -> ()) {

    dispatch_async(dispatch_get_global_queue(Int(QOS_CLASS_BACKGROUND.rawValue), 0), {
        let authStatus = CNContactStore.authorizationStatusForEntityType(.Contacts)

        switch authStatus {
        case .Authorized:
            completion(granted: true)
        case .Denied, .NotDetermined:

            // CRASH HERE before the completion block is called, after calling 
            // requestAccessForEntityType

            self.contactStore.requestAccessForEntityType(.Contacts, completionHandler: { (access, accessError) -> () in
                if access {
                    completion(granted: access)
                } else {
                    if authStatus == .Denied {
                        dispatch_async(dispatch_get_main_queue(), { () -> () in
                            let msg = "\(accessError!.localizedDescription)\n\nPlease allow the app to access your contacts through the Settings."
                            //self.alertService.showAlert(msg)
                        })
                    }
                }
            })
        default:
            completion(granted: false)
        }
    })
}

在标记的行，有一个 SIABRT 崩溃。关闭堆栈并运行 po $arg1 会抛出以下内容......

error: Couldn't materialize: couldn't read the value of register x0
Errored out in Execute, couldn't PrepareToExecuteJITExpression

我在根 dict 的 Info.plist 中有必要的行

<key>NSContactsUsageDescription</key>
<string>We need to access Contacts to import entries direct from the app.</string>

我还在目标属性(常规)的“链接框架和库”中包含了 Contacts.framework 和 ContactsUI.framework

Answer 1

我已经为联系人描述添加了 plist 条目并稍微修改了您的代码以便在我的 swift 3.0 项目中使用，以下代码在我的 iOS 10.0.2 上运行起来就像一个魅力

   override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated);
        self.requestForAccess { (gotAccess) in
            print(gotAccess)
        }
    }

    func requestForAccess(_ completion: @escaping (_ granted: Bool) -> ()) {
        DispatchQueue.global(qos: DispatchQoS.QoSClass.background).async { 
            let authStatus = CNContactStore.authorizationStatus(for: .contacts)

            switch authStatus {
            case .authorized:
                completion(true)
            case .denied, .notDetermined:

                self.contactStore.requestAccess(for: .contacts, completionHandler: { (access, accessError) -> () in
                    if access {
                        completion(access)
                    } else {
                        if authStatus == .denied {
                            DispatchQueue.main.async {
                                let msg = "\(accessError!.localizedDescription)\n\nPlease allow the app to access your contacts through the Settings."
                                print(msg)
                            }
                        }
                    }
                })
            default:
                completion(false)
            }
        }
    }