我被困在如何编写 CloudKit 完成 block 的想法上。我的问题是我正在加载数据，然后将数据放在 tableView 中。问题是我必须使用按钮手动刷新 tableView，而不是自动将数据加载到它。我需要的是在查询结束时有一个完成 block 来重新加载表数据。下面是我的查询函数:
func loadGroupPage() {
print("should go")
// let pred = NSPredicate(format: "Username = %@", usernameText)
let pred = NSPredicate(format: "groupName = %@", "\(selectedCellName)")
let query = CKQuery(recordType: "Group", predicate: pred)
let operation = CKQueryOperation(query: query)
//operation.resultsLimit = CKQueryOperationMaximumResults
operation.recordFetchedBlock = { (record: CKRecord!) in
operation.qualityOfService = .default
if record != nil{
// setup screen after loading data
self.recordToUpdate = record
if creatingNewPost == true{
print(feed)
//create new post record (modify record)
feed.append(postText)
creatingNewPost = false
self.saveNewPost()
}
self.publicOrPrivate = (record.object(forKey: "PublicOrPrivate") as! String)
if self.publicOrPrivate == "Public"{
// public
//print("you have joined")
}else if self.publicOrPrivate == "Private"{
// private
//print("requestSent")
// self.sendRequest()
self.requests = (record.object(forKey: "Requests") as! Array)
}
if self.groupMembs.contains(username) || members.contains(username){
self.joinBtn.alpha = 0
// in group
}else{
self.joinBtn.alpha = 1
}
if self.leaders.contains(username) && self.publicOrPrivate == "Private"{
// leader
self.requestsTableView.alpha = 1
}else{
self.requestsTableView.alpha = 0
}
if self.groupMembs.contains(username) || self.publicOrPrivate == "Public"{
// leader
feed = (record.object(forKey: "groupFeed") as! Array)
print(feed)
}else{
}
self.groupMembs = (record.object(forKey: "memberUsernames") as! Array)
print(self.groupMembs)
self.numberOfMembersInGroup = self.groupMembs.count
self.groupNameLbl.text = selectedCellName
self.numberOfMembersLbl.text = "\(self.numberOfMembersInGroup) Members"
self.leaders = (record.object(forKey: "leaders") as! Array)
//****************************************************
// this does nothing until I refresh it manually!
self.requestsTableView.reloadData()
self.groupFeedTableView.reloadData()
//****************************************************
//Need completion block so the above two lines will fire directly after data is done loading!
}
}
database.add(operation)
}
正如我在上面的代码中记录的那样，刷新那里的表格不会在实际 UI 中加载任何内容。有人可以写一个完成 block 来简单地为我重新加载 tableView 吗？谢谢!
最佳答案
更新:
我使用下面的代码来添加补全:
operation.queryCompletionBlock = { [unowned self] (cursor, error) in
DispatchQueue.main.async {
if error == nil {
self.tableView.reloadData()
}
}
}
像魅力一样工作!
关于arrays - 需要在 CloudKit 查询后立即触发完成 block ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47274834/