我不知道我的tableView: cellForRowAtIndexPath
有什么问题。它永远不会因为某种原因而被召唤。我已经调用了适当的委托和数据源。当我在cellForRowAtIndexPath
函数下添加print("")
行时,它在我模拟应用程序时从不出现。tableview:cellForRowAtIndexPath没有被调用
谢谢您的高级。
这里是我的整个页面代码:
class MainPageViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var sportCells = [PFObject]()
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var profilePictureImageView: UIImageView!
@IBOutlet weak var fullNameLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.dataSource = self
self.tableView.delegate = self
//Do any additional setup after loading the view.
}
override func viewDidAppear(animated: Bool) {
updateSportsTable()
print("its happening")
let lastName = PFUser.currentUser()! ["last_name"]
if let firstName = PFUser.currentUser()?["first_name"] as? String {
self.fullNameLabel.text = "\(firstName) \(lastName)"
}
if let userPicture = PFUser.currentUser()?["profile_picture"] as? PFFile {
userPicture.getDataInBackgroundWithBlock { (imageData: NSData?, error: NSError?) -> Void in
if (error == nil) {
self.profilePictureImageView.image = UIImage(data:imageData!)
}
}
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("sportCells count is \(sportCells.count)")
return sportCells.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
print("data extracted1")
let cell = tableView.dequeueReusableCellWithIdentifier("sportCell") as! SportTableViewCell
print("data extracted")
let sportPost = self.sportCells[indexPath.row]
let user = sportPost["user"] as! PFUser
print("data extracted")
do {
try user.fetchIfNeeded()
print("its happening 3rd time")
} catch _ {
print("There was an error")
}
cell.sportTitle.text = sportPost["basketballTitle"] as? String
cell.sportLogo.text = sportPost["basketballLogo"] as? String
cell.numberOfPOTM.text = "5"
return cell
}
func updateSportsTable() {
let query = PFQuery(className: "Sports")
query.findObjectsInBackgroundWithBlock { (sportCells:[PFObject]?, error:NSError?) -> Void in
if error == nil {
self.tableView.reloadData()
print("its happening again")
}
}
}
'sportCells.count'在'numberOfRowsInSection'中打印了什么?另外,如果要在故事板或XIB中添加表格视图,请尝试删除约束并重新添加它们。 – Abhinav
sportCells.count打印0.我认为它是因为cellForRowAtIndexPath没有被调用。我试着删除约束条件,然后重新添加它们,看看会发生什么,然后回到你身边。谢谢 – oatout
'sportCells.count == 0' - >你的问题。 http://stackoverflow.com/questions/33384433/uitableview-does-not-load-data/33384470#33384470 – anhtu