任何适用于 IOS8 beta CloudKit 的 CKDiscoverAllContactsOperation 示例代码？

Posted 2023-02-24

【中文标题】任何适用于 IOS8 beta CloudKit 的 CKDiscoverAllContactsOperation 示例代码？

【英文标题】：Any working sample code for CKDiscoverAllContactsOperation for IOS8 beta CloudKit?

【发布时间】：2014-07-09 17:20:05

【问题描述】：

我在 ios 8 beta 中一直在玩 icloud，CloudKitAtlasAnIntroductiontoCloudKit 示例项目非常有帮助。 https://developer.apple.com/library/prerelease/ios/samplecode/CloudAtlas/Introduction/Intro.html

但我想使用CKDiscoverAllContactsOperation 类，但我在任何地方都找不到它的任何示例代码，而且在线文档也不是很有帮助。 https://developer.apple.com/library/prerelease/ios/documentation/CloudKit/Reference/CKDiscoverAllContactsOperation_class/index.html

如果有人成功地使用了CKDiscoverAllContactsOperation，请你帮我指出正确的方向或展示一个应该如何调用它的工作示例？

我已经试过这个，看看我是否能从 iCloud 中得到回应，但什么也没有：

- (void)queryForRecordsOtherUsersInAddressBookcompletionHandler:(void (^)(NSArray *records))completionHandler 

CKDiscoverAllContactsOperation *discoverAllContactsOperation= [[CKDiscoverAllContactsOperation alloc] init];
[discoverAllContactsOperation setContainer:_container];

NSMutableArray *results = [[NSMutableArray alloc] init];


discoverAllContactsOperation.discoverAllContactsCompletionBlock = ^(NSArray *userInfos, NSError *operationError) 
    [results addObjectsFromArray:userInfos];
;


discoverAllContactsOperation.discoverAllContactsCompletionBlock=^(NSArray *userInfos, NSError *operationError)
    if (operationError) 
        // In your app, handle this error with such perfection that your users will never realize an error occurred.
        NSLog(@"An error occured in %@: %@", NSStringFromSelector(_cmd), operationError);
        abort();
     else 
        dispatch_async(dispatch_get_main_queue(), ^(void)
            completionHandler(results);
        );

    
;

然后用这个打电话……

 [self.cloudManager queryForRecordsOtherUsersInAddressBookcompletionHandler:^(NSArray *records ) 
                if (records.count==0)
                    NSLog(@"Login name not found");
                    return;
                
                //self.results= records;
                //_loggedInRecord = self.results[0];
                //NSLog(@"%@,%@",_loggedInRecord[@"lastName"],_loggedInRecord[@"firstName"]);
               // [self performSegueWithIdentifier:@"loggedInSegue" sender:self ];

            ];

我知道代码实际上不应该做任何事情。再次，我只是在寻找来自 iCloud 的回应。

【参考方案1】：

这是我正在使用的。 self.container 是一个 CKContainer 集合，[CKContainer defaultContainer] 在 init 中。

  -(void)queryForAllUsers: (void (^)(NSArray *records))completionHandler 

    CKDiscoverAllContactsOperation *op = [[CKDiscoverAllContactsOperation alloc] init];

    [op setUsesBackgroundSession:YES];
    op.queuePriority = NSOperationQueuePriorityNormal;

    [op setDiscoverAllContactsCompletionBlock:^(NSArray *userInfos, NSError *error) 

        if (error) 
            NSLog(@"An error occured in %@: %@", NSStringFromSelector(_cmd), error);
            //abort();
         else 

     //       NSLog(@"Number of records in userInfos is: %ld", (unsigned long)[userInfos count]);
            dispatch_async(dispatch_get_main_queue(), ^(void)
                completionHandler(userInfos);
            );
        
    ];
    [self.container addOperation:op];

【讨论】：

仍然无法正常工作。如果您发现任何关于此的信息，请告诉我。

确保将您的操作添加到队列中，例如：[self.container addOperation:op];

@BillJohnson 我在 userInfos 中得到了零。知道可能出了什么问题吗？我正在使用您在上面发布的相同代码。

【参考方案2】：

在您可以使用CKDiscoverAllContactsOperation操作之前，您首先需要请求权限。

请使用requestApplicationPermission:completion:的方法

func discoverAllContacts() 

    let container = CKContainer.defaultContainer()

    //Request for user permission
    container.requestApplicationPermission([.UserDiscoverability])  [weak self] status, error in

        switch status 
        case .Granted where error == nil:
            let operation = self?.discoverAllContactsOperation  usersInfo in
                //do something here
            

            if let operationExists = operation 

                //Assuming there is a NSOperationQueue property called operationQueue
                self?.operationQueue.addOperation(operationExists)

            

        default:
            break
        
    


func discoverAllContactsOperation(completionHandler: ([CKDiscoveredUserInfo]?) -> ()) -> NSOperation 

    let operation = CKDiscoverAllContactsOperation()

    operation.discoverAllContactsCompletionBlock =  usersInfo, error in

        if error == nil 
            print("Discoverd all contacts = \(usersInfo)")
            completionHandler(usersInfo)
        
        else 
            print("Discoverd all contacts error = \(error)")
            completionHandler(nil)
        

    

    return operation