使用swift / parse尝试在下表视图控制器中填充自定义单元格。 pfquery代码似乎没问题，但是当我尝试使用数据来填充cell.something.text以及应该返回的结果时，我收到错误，指示该类型没有名为'objectForKey'的成员并且使用未解决的标识符。这些错误特别发生在覆盖func tableView（tableView..cellForRowAtIndexPath ....
下）import UIKit
class TimeLineTableViewController: UITableViewController {
var timelineData:NSMutableArray = NSMutableArray()
override init(style: UITableViewStyle) {
super.init(style: style)
// Custom initialization
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func loadData(){
timelineData.removeAllObjects()
//let predicate = NSPredicate(format: PFuser = PFUser.current)
var findTimelineData:PFQuery = PFQuery(className: "event")
//findTimelineData.whereKey(PFUser.self, equalTo: PFUser.currentUser())
findTimelineData.findObjectsInBackgroundWithBlock{
(objects: [AnyObject]!, error: NSError!) -> Void in
if error == nil {
// The find succeeded.
println("Successfully retrieved \(objects.count) scores.")
// Do something with the found objects
if let objects = objects as? [PFObject] {
for object in objects {
self.timelineData.addObject(object)
println(object.objectId)
}
let array:NSArray = self.timelineData.reverseObjectEnumerator().allObjects
self.timelineData = array as NSMutableArray
self.tableView.reloadData()
}
} else {
// Log details of the failure
println("Error: \(error) \(error.userInfo!)")
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
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 timelineData.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:TimeLineTableViewCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as TimeLineTableViewCell
let event:PFObject = self.timelineData.objectAtIndex(indexPath.row) as PFObject
cell.eventLabel.alpha = 0
cell.dateLabel.alpha = 0
cell.minutesLabel.alpha = 0
cell.eventLabel.text = Category.objectForKey("content") as String
cell.minutesLabel.text = duration.objectForKey
var dataFormatter:NSDateFormatter = NSDateFormatter()
dataFormatter.dateFormat = "yyyy-MM-dd HH:mm"
cell.dateLabel.text = dataFormatter.stringFromDate(category.createdAt)
var findRecorder:PFQuery = PFUser.query()
findRecorder.whereKey("objectId", equalTo: event.objectForKey(user).objectId)
findRecorder.findObjectsInBackgroundWithBlock{
(objects:[AnyObject]!, error:NSError!)->Void in
if error == nil{
let user:PFUser = (objects as NSArray).lastObject as PFUser
UIView.animateWithDuration(0.5, animations: {
cell.eventLabel.alpha = 1
cell.dateLabel.alpha = 1
cell.minutesLabel.alpha = 1
})
}
}
return cell
}
/*
// 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 {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the item to be re-orderable.
return true
}
*/
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
}
答案 0 :(得分：0)
您的问题是您使用的代码中没有初始化的变量：
cell.minutesLabel.text = duration.objectForKey
^
cell.dateLabel.text = dataFormatter.stringFromDate(category.createdAt)
^
您永远不会在代码中初始化duration或category。所以你无法访问它。您首先需要初始化它。
此外，我不确定，但看起来您不会导入Parse框架（也许您可以，但它不在您提供的代码中）
所以你需要先导入它：
import Parse