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我有一个自定义表格视图控制器，我试图从分析表中提取数据。虽然我能够将数据保存到这个解析数据，空白显示了当使用相同的代码来检索：无法从分析表中检索数据
代码TVC：
import UIKit
class SavedNoteTableViewController: UITableViewController {
var noteObjects: NSMutableArray! = NSMutableArray()
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if (PFUser.currentUser() == nil) {
}else {
self.fetchAllObjectsFromLocalDatastore()
self.fetchAllObjects()
}
}
func fetchAllObjectsFromLocalDatastore() {
var query: PFQuery = PFQuery(className: "savedNotes")
query.fromLocalDatastore()
query.whereKey("username", equalTo: PFUser.currentUser()!.username!)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
var temp: NSArray = objects as NSArray!
self.noteObjects = temp.mutableCopy() as! NSMutableArray
self.tableView.reloadData()
}else {
println(error!.userInfo)
}
}
}
func fetchAllObjects() {
PFObject.unpinAllObjectsInBackgroundWithBlock(nil)
var query: PFQuery = PFQuery(className: "savedNotes")
query.whereKey("username", equalTo: PFUser.currentUser()!.username!)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
PFObject.pinAllInBackground(objects, block: nil)
self.fetchAllObjectsFromLocalDatastore()
}else {
println(error!.userInfo)
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Potentially incomplete method implementation.
// Return the number of sections.
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return self.noteObjects.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! SavedNoteTableViewCell
var object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
cell.tickerLabel?.text = object["ticker"] as? String
return cell
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
/*
var upcoming: AddNoteTableViewController = segue.destinationViewController as! AddNoteTableViewController
if (segue.identifier == "editNote") {
let indexPath = self.tableView.indexPathForSelectedRow()!
var object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
upcoming.object = object;
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
*/
}
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
var object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
// Delete the row from the data source
let objectToDelete = object
objectToDelete.deleteInBackgroundWithBlock {
(success: Bool, error: NSError?) -> Void in
if (success) {
// Force a reload of the table - fetching fresh data from Parse platform
// self.loadObjects()
// self.tableView.reloadData()
self.fetchAllObjectsFromLocalDatastore()
self.fetchAllObjects()
} else {
// There was a problem, check error.description
}
}
}
}
}
代码自定义的表格视图单元格：
import UIKit
class SavedNoteTableViewCell: UITableViewCell {
@IBOutlet weak var tickerLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
没有出现错误消息，尽管存在数据库中的记录，但只显示空白。任何建议感激！
'savedNotes'类有一个叫做'username'场？ – kRiZ
是的，我做了第一件事，我仔细检查:) – user2647092