Question

我有一个类，它有一个从CloudKit中提取数据的CKAsset（图像文件）。但是，我无法弄清楚如何初始化CKAsset。我在初始化时没有数据。该类也有字符串，但我可以使用“”来初始化它们。什么可以用来初始化CKAsset？

这是我的班级......

class Locations: NSObject, MKAnnotation {
var title: String?
var subtitle: String?
var coordinate: CLLocationCoordinate2D
var story: String?
var image: CKAsset

override init()
{
    self.title = "Test Title"
    self.subtitle = "Test Subtitle"
    self.coordinate = CLLocationCoordinate2D.init()
    self.story = ""
    self.image = <- How do I init the CKAsset before I have the data?
}
}

Answer 1

早上，你会在这段代码中找到你问题的答案：）

func saveLeCollection（theGlob：NSURL）{

    let container = CKContainer(identifier: "iCloud.com")
    let publicDB = container.publicCloudDatabase

    let singleLink2LinkthemALL = CKRecordID(recordName: uniqReference)
    let newRecord = CKRecord(recordType: "Collection", recordID: singleLink2LinkthemALL)
    let whistleAsset = CKAsset(fileURL: theAssetURL)
    newRecord["theAsset"] = whistleAsset


    var localChanges:[CKRecord] = []
    localChanges.append(newRecord)

    let saveRecordsOperation = CKModifyRecordsOperation(recordsToSave: localChanges, recordIDsToDelete: nil)
    saveRecordsOperation.savePolicy = .ChangedKeys
    saveRecordsOperation.perRecordCompletionBlock =  { record, error in
        if error != nil {
            self.showAlert(message: error!.localizedDescription)
            print(error!.localizedDescription)
        }
        // deal with conflicts
        // set completionHandler of wrapper operation if it's the case
    }
    saveRecordsOperation.modifyRecordsCompletionBlock = { savedRecords, deletedRecordIDs, error in
        if error != nil {
            self.showAlert(message: error!.localizedDescription)
            print(error!.localizedDescription)
        } else {
            // deal with conflictsay
            // set completionHandler of wrapper operation if it's the case

        }
    }

    publicDB.addOperation(saveRecordsOperation)


}

Answer 2

首先我想说在init（）中设置属性就像你正在做的那样对CKAsset不起作用，因为在你打电话并将记录传递给你的类之前，你不会知道文件URL或CK将会命名保存CKAsset文件。但是，我构建了这个框架，你永远不需要在类中有一个CKAsset。它处理一切。从下载到缓存，您只需要资产的recordID和属性键。您可以直接在imageview上使用这些方法。希望这可以帮助。 https://github.com/agibson73/AGCKImage

如何初始化CKAsset？

2 个答案: