UITableview重载tableview和单元格 [英] UITableview reloading tableview and cell
问题描述
我正在尝试使用
self.tableView.reloadData()
如果我使用数组加载静态数据源,它将正常工作.一切正常. 但是,当我尝试将查询功能与解析一起使用时,它会加载一个新单元格,但tableview单元格的内容不会更改.如果我重新打开该应用程序,则单元格将正确更新.
It works properly if I'm loading static datasource using array. Everything work properly. But when I try to use my query function with parse, it loads a new cell but the contents of the tableview cell doesn't change. If I re-open the app, the cells will update properly.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "EmpPostTVCellIdentifier"
let cell: EmpPostTVCell? = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as? EmpPostTVCell
//If datasource
if dataSource.isEmpty{
fetchDataFromParse()
print("no posts")
}
let itemArr:PFObject = self.dataSource[indexPath.row]
cell?.companyPostLabel.text = (PFUser.currentUser()?.objectForKey("companyName")!.capitalizedString)! as String
cell?.occupationPostLabel.text = itemArr["occupation"]!.capitalizedString as String
cell?.countryPostLabel.text = itemArr["country"]!.capitalizedString as String
let companyImage: PFFile?
companyImage = PFUser.currentUser()?.objectForKey("profileImageEmployer") as? PFFile
companyImage?.getDataInBackgroundWithBlock({ (data, error) -> Void in
if error == nil{
cell?.companyLogoImage.image = UIImage(data: data!)
}
})
let dateArr = createdByDate[indexPath.row]
let strDate = Settings.dateFormatter(dateArr)
cell?.closingDateLabel .text = strDate
return cell!
}
我正在使用pull来使用此代码刷新我的tableviews内容
I am using pull to refresh my tableviews contents using this code
func refresh(sender:AnyObject)
{
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.fetchDataFromParse()
self.tableView.reloadData()
self.refreshControl?.endRefreshing()
})
}
带有或不带有dispatch_asynch函数的结果保持不变.它只是添加了新的tableviewcell,但其中的内容没有改变.有想法吗?
with or without the dispatch_asynch function the results remains the same. It just add new tableviewcell but the contents in it does not change. Any ideas guys?
func fetchDataFromParse() {
// MARK: - JOB POST QUERY
if PFUser.currentUser()?.objectId == nil{
PFUser.currentUser()?.saveInBackgroundWithBlock({ (success, error) -> Void in
let query = PFQuery(className: "JobPost")
//creating a pointer
let userPointer = PFUser.objectWithoutDataWithObjectId(PFUser.currentUser()?.objectId)
query.whereKey("postedBy", equalTo: userPointer)
query.orderByDescending("createdAt")
let objects = query.findObjects()
for object in (objects as? [PFObject])!{
//print(object.objectId)
self.dataSource.append(object)
self.createdByDate.append((object.objectForKey("closingDate") as? NSDate)!)
print(self.dataSource)
print(self.createdByDate)
}
})
} else {
let query = PFQuery(className: "JobPost")
//creating a pointer
let userPointer = PFUser.objectWithoutDataWithObjectId(PFUser.currentUser()?.objectId)
query.whereKey("postedBy", equalTo: userPointer)
query.orderByDescending("createdAt")
let objects = query.findObjects()
for object in (objects as? [PFObject])!{
//print(object.objectId)
self.dataSource.append(object)
self.createdByDate.append((object.objectForKey("closingDate") as? NSDate)!)
print(self.dataSource)
print(self.createdByDate)
}
}//end of PFUser objectID == nil else clause
}
推荐答案
让我们看看fetchDataFromParse()函数的内容,我假设您正在填充self.dataSource数组
Let's see the content of the fetchDataFromParse() function where I presume you're filling the self.dataSource array
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