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我有一個集合視圖將水平滾動。並在該集合視圖中每個單元格點擊 - 我有加載表視圖中的相應數據。因此，我將我的表視圖放在集合視圖下。應用程序崩潰同時運行集合視圖和表視圖同時.Crash：致命錯誤：意外地發現零，同時展開一個可選值
崩潰報告：
fatal error: unexpectedly found nil while unwrapping an Optional value
這裏是我的代碼：
class HomeDiscoverViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UITableViewDataSource, UITableViewDelegate {
@IBOutlet var BTCollectionView: UICollectionView!
@IBOutlet var DLTableView: UITableView!
var BTdata = [BTData]()
var Dealsdata = [DealsData]()
override func viewDidLoad()
{
super.viewDidLoad()
ListBusinessTypes()
}
// Values from Api for Business Types
func ListBusinessTypes()
{
let token = NSUserDefaults.standardUserDefaults().valueForKey("access_token") as! String
let headers = ["x-access-token": token]
let request = NSMutableURLRequest(URL: NSURL(string: "someurl")!,
cachePolicy: .UseProtocolCachePolicy,
timeoutInterval: 10.0)
request.HTTPMethod = "GET"
request.allHTTPHeaderFields = headers
let session = NSURLSession.sharedSession()
let dataTask = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in
if (error != nil)
{
print(error)
let ErrorAlert = UIAlertController(title: "Error", message: "Problem with internet connectivity or server, please try after some time", preferredStyle: UIAlertControllerStyle.Alert)
// add an action (button)
ErrorAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
// show the alert
self.presentViewController(ErrorAlert, animated: true, completion: nil)
}
else
{
if let json = (try? NSJSONSerialization.JSONObjectWithData(data!, options: [])) as? Dictionary<String,AnyObject>
{
let success = json["success"] as? Int
if(success == 1)
{
if let typeValues = json["data"] as? [NSDictionary]
{
dispatch_async(dispatch_get_main_queue(),{
for item in typeValues
{
self.BTdata.append(BTData(json:item))
}
})
}
self.BTCollectionView.reloadData()
}
else
{
let message = json["message"] as? String
print(message)
let ServerAlert = UIAlertController(title: "Error", message: message, preferredStyle: UIAlertControllerStyle.Alert)
// add an action (button)
ServerAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
// show the alert
self.presentViewController(ServerAlert, animated: true, completion: nil)
}
}
}
})
dataTask.resume()
}
// values from Api For Deals
func ListDeals(BTId:String)
{
let token = NSUserDefaults.standardUserDefaults().valueForKey("access_token") as! String
let headers = [
"cache-control": "no-cache",
"postman-token": "1befe4c6-ec7c-ccb3-f537-97307f451807"
]
let StringURL = "someurl"+token
let request = NSMutableURLRequest(URL: NSURL(string: StringURL)!,
cachePolicy: .UseProtocolCachePolicy,
timeoutInterval: 10.0)
request.HTTPMethod = "GET"
request.allHTTPHeaderFields = headers
let session = NSURLSession.sharedSession()
let dataTask = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in
if (error != nil)
{
print(error)
}
else
{
if let json = (try? NSJSONSerialization.JSONObjectWithData(data!, options: [])) as? Dictionary<String,AnyObject>
{
let success = json["success"] as? Int
if(success == 1)
{
if let DealsValues = json["data"] as? [NSDictionary]
{
dispatch_async(dispatch_get_main_queue(),{
for item in DealsValues
{
let itemObj = item as? Dictionary<String,AnyObject>
let b_type = itemObj!["business_type"] as? String
if(b_type == BTId)
{
self.Dealsdata.append(DealsData(json:item))
}
}
self.DLTableView.reloadData()
})
}
}
else
{
let message = json["message"] as? String
print(message)
let ServerAlert = UIAlertController(title: "Error", message: message, preferredStyle: UIAlertControllerStyle.Alert)
// add an action (button)
ServerAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
// show the alert
self.presentViewController(ServerAlert, animated: true, completion: nil)
}
}
}
})
dataTask.resume()
}
// Mark : Collection View Delegate and Datasource(Business Type)
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return BTdata.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{
let cell: DDLCollectionCell = collectionView.dequeueReusableCellWithReuseIdentifier("BTCell", forIndexPath: indexPath) as! DDLCollectionCell
cell.BTName.text = BTdata[indexPath.row].BTNames
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
ListDeals(BTdata[indexPath.row].BTIds!)
}
// Mark : Table View Delegate and Datasource(Deals)
// count of search value and row value that are displaying
func numberOfSectionsInTableView(tableView: UITableView) -> Int
{
return self.Dealsdata.count
}
// number of rows
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell:DealsListTableCell = self.DLTableView.dequeueReusableCellWithIdentifier("cell") as! DealsListTableCell
cell.DealName.text = Dealsdata[indexPath.row].DealNames
cell.DealExpiryDate.text = Dealsdata[indexPath.row].DealAddresses
return cell
}
我得到的是fatel錯誤的位置：
self.BTCollectionView.reloadData()
在ListBusinessTypes() method.I添加的所有委託和數據源。但不知道什麼是ia失蹤。請幫助我。
謝謝。
outlet'BTCollectionView'已連接？ –
是的，它的連接 – user5513630