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我想用斯威夫特在下面的解析表中的「userVotes」列追加到一個數組 -SWIFT:解析列不追加到數組
這裏是我的代碼 -
import UIKit
import Parse
class MusicPlaylistTableViewController: UITableViewController {
var usernames = [String]()
var songs = [String]()
var voters = [String]()
var numVotes = 0
override func viewDidLoad() {
super.viewDidLoad()
tableView.separatorColor = UIColor.grayColor()
let query = PFQuery(className:"PlaylistData")
query.findObjectsInBackgroundWithBlock { (objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = objects! as? [PFObject] {
self.usernames.removeAll()
self.songs.removeAll()
self.voters.removeAll()
for object in objects {
let username = object["username"] as? String
self.usernames.append(username!)
let track = object["song"] as? String
self.songs.append(track!)
let title = object["userVotes"]! as? String
self.voters.append(title!)
print("Array: \(self.voters)")
}
self.tableView.reloadData()
}
} else {
print(error)
}
}
}
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 Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return usernames.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CellTrack", forIndexPath: indexPath) as! TrackTableViewCell
//cell.username.text = usernames[indexPath.row]
cell.username.text = usernames[indexPath.row]
cell.songTitle.text = songs[indexPath.row]
cell.votes.text = "\(numVotes)"
cell.selectionStyle = UITableViewCellSelectionStyle.None
return cell
}
override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
}
}
我想解析陣列列追加如下 - [[ 「用戶1,」 USER5 「USER9」],[ 「用戶1,」 用戶2 「用戶3」],[ 「USER4,」 USER5, 「user6」],...]
在這一點上,我得到以下運行時錯誤 - 致命錯誤:意外發現零而展開的可選值
完美,謝謝! – SB2015