Ios iCloud读取带有资产或资产列表的记录时出错

在装有iOS 9.2的iPad上运行El Capitan下的Xcode 7.1.1

在一个非常简单的数据库上运行此代码。。。对于包含定义为字符串的记录类型、引用+资产字段的数据库

-(void)slideLoader:(CKRecordID*)slideReference {
privateDB = [[CKContainer defaultContainer] privateCloudDatabase];

NSPredicate* predicate = [NSPredicate predicateWithFormat:@"presentationReference == %@", slideReference];
CKQuery *query = [[CKQuery alloc] initWithRecordType:@"Slides" predicate:predicate];

[privateDB performQuery:query inZoneWithID:nil completionHandler:^(NSArray *results, NSError *error){
    if(error) {
        NSLog(@"Error: %@", error.localizedDescription);
    }
    if(results) {
      for(CKRecord *record in results) {
            NSString *blah = [NSString stringWithFormat:@"%@",record[@"Order"]];
            CKRecordID *blahR = record.recordID;
            [pickerNames addObject:blah];
            [slidesReferenceID addObject:blahR];
            }
        }
   }];
}

它因[下面]的错误消息而崩溃。。。等等，它甚至没有到达for循环；它在那条线之前坠毁了。现在，如果我进入iCloud仪表板并删除asset字段，它可以完美地工作。。。那么我在这里错过了什么

<NSXPCConnection: 0x1557293e0> connection to service named com.apple.cloudd:    Warning: Exception caught during decoding of received message, dropping incoming message.
Exception: Exception while decoding argument 0 (#2 of invocation):
<NSInvocation: 0x1555672e0>
return value: {v} void
target: {@} 0x0
selector: {:} handleOperationCompletion:forOperationWithID:
argument 2: {@} 0x0
argument 3: {@} 0x0

Exception: value for key 'NS.keys' was of unexpected class 'CKRecordID'. Allowed classes are '{(
NSURL,
NSString,
NSDate,
NSData,
NSNumber,
NSDictionary,
NSError,
NSArray
)}'.

用声明打电话

#import "projectName-Swift.h"

iCloudMethods *iCloudMethod = [[iCloudMethods alloc] init];
[iCloudMethod slideLoader:presentationReferenceID[row]];

可悲的是，当我将资产添加到仪表板时，仍然会出现相同的错误消息，如果我将它们保留为空，那么这些错误消息是否可以完美地工作？要确保记录定义如下所示

即使尝试用基本的查询操作来实现这一点，仍然失败

func slideLoaderV2(slideReference: CKRecordID)  {
    let container = CKContainer.defaultContainer()
    let privateDB = container.privateCloudDatabase

    let predicate = NSPredicate(format: "presentationReference == %@", slideReference)
    let query = CKQuery(recordType: "Slides", predicate: predicate)
    let operation = CKQueryOperation(query: query)

    operation.recordFetchedBlock = { (record) in
                   print(record["Order"])
    }

    operation.queryCompletionBlock = { [unowned self] (cursor, error) in
        dispatch_async(dispatch_get_main_queue()) {
            if error == nil {
                print("ok")
            } else {
                print(error!.localizedDescription)
            }
        }
    }
     _ = privateDB.addOperation(operation)
}

嗯

我找到了解决办法；我不得不拼凑出一个影子应用程序，让我可以通过API和云工具包仪表板将图像上传到正确的数据库。使用API上传了一个资产后，上面的代码工作得非常好。这似乎是iCloudkit仪表板中的一个BUG；也许它是El Capitan的一个特性，或者是Xcode 7.1.1，甚至是IOS 9.2

func slideLoaderV2(slideReference: CKRecordID)  {
    let container = CKContainer.defaultContainer()
    let privateDB = container.privateCloudDatabase

    let predicate = NSPredicate(format: "presentationReference == %@", slideReference)
    let query = CKQuery(recordType: "Slides", predicate: predicate)
    let operation = CKQueryOperation(query: query)

    operation.recordFetchedBlock = { (record) in
                   print(record["Order"])
    }

    operation.queryCompletionBlock = { [unowned self] (cursor, error) in
        dispatch_async(dispatch_get_main_queue()) {
            if error == nil {
                print("ok")
            } else {
                print(error!.localizedDescription)
            }
        }
    }
     _ = privateDB.addOperation(operation)
}