ios - SWIFT/CloudKit - 更新记录并将其保存回容器

Question

我在更新 CloudKit 记录时遇到问题。我想要实现的是允许用户通过单击表格 View 行来投票给一本书。 该表格 View 当前使用云数据中的记录进行填充。 当我想要检索一条记录(即选定的表格 View 行)并将其 voteCount 列增加 1，然后将其保存回云端并重新加载表格 View 中的数据时，我陷入了困境。

目前我正在通过以下方式检索记录:

    booksIncludedInVote = []
    let cloudContainer = CKContainer.defaultContainer()
    let publicDatabase =CKContainer.defaultContainer().publicCloudDatabase

    let predicate = NSPredicate(value: true)
    let query = CKQuery(recordType: "Book", predicate: predicate)
    let queryOperation = CKQueryOperation(query: query)
    queryOperation.desiredKeys = ["name", "author", "image", "description", "voteCount"]
    queryOperation.queuePriority = .VeryHigh
    queryOperation.resultsLimit = 50
    queryOperation.recordFetchedBlock = { (record:CKRecord!) -> Void in
    if let restaurantRecord = record {
      self.booksIncludedInVote.append(restaurantRecord)
    }

您可以帮助我更新特定记录，然后将其发送回云端吗？

Answer 1

您还需要这样的代码:

    operation.queryCompletionBlock = { cursor, error in
            self.tableView.ReloadData()
        }
    publicDatabase.addOperation(operation)
}

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
     var record = self.booksIncludedInVote[indexPath.row]
     // now increment the voteCount value in that record and save it using 
     publicDatabase.saveRecord(theRecord, completionHandler: { record, error in
     }
}