Using UITableViewController and Cell with Parse

Question

我一直在遵循本教程（https://www.youtube.com/watch?v=Q6qcrO8uNzU&feature=youtu.be）。下面是最后生成的代码。但是，对于getShifts.findObjectsInBackgroundWithBlock { (objects:AnyObject[]!, error:NSError!) -> Void in

我

收到一个错误，说我应该像[AnyObject]!一样放AnyObject[]!......但这只会产生更多错误。有什么想法吗？

 import UIKit
class AvailableShifts: UITableViewController {
var shiftData: NSMutableArray!
override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(true)
    loadData()
    // 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 2//shiftData.count
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell:AvailableShiftsCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as AvailableShiftsCell
    let shift: PFObject = shiftData.objectAtIndex(indexPath.row) as PFObject
    cell.shiftLabel.text = shift.objectForKey("Shift") as String
    // Configure the cell...
    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.
}
*/
func loadData () {
    shiftData.removeAllObjects()
    var getShifts = PFQuery(className: "Shifts")
    getShifts.findObjectsInBackgroundWithBlock {
        (objects:AnyObject[]!, error:NSError!) -> Void in
        if (error == nil) {
            for object: PFObject! in objects {
                self.shiftData.addObject(object)
            }
            let array: NSArray = self.shiftData.reverseObjectEnumerator().allObjects
            self.shiftData = array as NSMutableArray
            self.tableView.reloadData()
        }
    }
}
}

Answer 1

尝试以下操作，顶部var shiftData: NSMutableArray!的第一次更改为var shiftData = [PFObject]()

和你的函数加载数据（）

func loadData () {
    var getShifts = PFQuery(className: "Shifts")
    getShifts.findObjectsInBackgroundWithBlock {
    (objects: [AnyObject]!, error: NSError!) -> Void in
    if error == nil {
    var shiftData = objects as [PFObject]
    self.shiftData = shiftData
    var lastIndex = NSIndexPath(forRow: self.shiftData.count - 1, inSection: 0)
  }
 }
}

和在cellForRowAtIndexPath

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell" as AvailableShiftsCell
    let shift = self.shiftData[indexPath.row]
        cell.shiftLabel.text = shift as String
    return cell
}

希望有帮助。