我必须从Parse检索图像，我正在处理这段代码：
class ViewControllerHome: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak var MessageTable: UITableView!
let color = UIColor(red: 0.0/255.0, green: 105.0/255.0, blue: 92.0/255.0, alpha: 1)
let colore = UIColor.whiteColor()
let coloree = UIColor(red: 33.0/255.0, green: 33.0/255.0, blue: 33.0/255.0, alpha: 1)
var Username = [String]()
var Image = [PFFile]()
var Likes = [Int]()
override func viewDidLoad() {
super.viewDidLoad()
var refreshControl = UIRefreshControl()
refreshControl.addTarget(self, action: Selector("refreshPulled"), forControlEvents: UIControlEvents.ValueChanged)
loadData()
self.MessageTable.reloadData()
self.navigationController?.navigationBar.barTintColor = color
self.navigationController?.navigationBar.tintColor = colore
self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: colore]
UITabBar.appearance().barTintColor = coloree
UITabBar.appearance().tintColor = colore
UITabBar.appearance().translucent = false
self.MessageTable.delegate = self
self.MessageTable.dataSource = self
func refreshPulled() {
loadData()
self.MessageTable.reloadData()
refreshControl.endRefreshing()
}
}
func loadData() {
let query = PFQuery(className: "Messages")
query.orderByDescending("createdAt")
query.findObjectsInBackgroundWithBlock {
(posts: [PFObject]?, error: NSError?) -> Void in
if (error == nil) {
if let posts = posts as [PFObject]? {
for post in posts{
self.Image.append(post["Post"] as! PFFile)
self.Username.append(post["Name"] as! String)
self.Likes.append(post["Vote"] as! Int)
}
}
}
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.MessageTable.dequeueReusableCellWithIdentifier("cell")! as! TableViewCellHome
var imagesToLoad = self.Image[indexPath.row] as PFFile
var imagesUser = self.Username[indexPath.row] as String
var imageLikes = self.Likes[indexPath.row] as Int
//This line gives me an error: call can throw, but is not marked with 'try' and the error is not handled
var imagesdata = imagesToLoad.getData()
var finalizedImage = UIImage(data: imagesdata)
cell.PostImage.image = finalizedImage
cell.UsernameLabel.text = imagesUser
cell.LikesLabel.text = "\(imageLikes)"
return cell
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return Username.count
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
此代码应该从parse的后端获取并显示Image，string和Int Value。问题是没有显示任何内容。如何更改代码以便正确显示？该行还有一个错误：
var imagesdata = imagesToLoad.getData()
这一行告诉我
电话可以扔，但没有标记＆＃39;尝试＆＃39;并且没有处理错误
提前感谢任何可以帮助我解决此问题的人。