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我的应用程序获取图像就好，但如果我上下滚动一段时间，然后拉刷新，它崩溃并说数组超出索引。这不会每次都发生。我相信这跟我没有使用getdatainbackground的事实有关，但是当我使用它而不是getData（）时，它比实际检索文件的循环更快，而且它们失灵。阵列从索引获取PFFile时从索引
我目前的代码也给我这个错误：Break on warnBlockingOperationOnMainThread（）来调试。 2016-03-02 00：35：48.630应用程序名称[1137：96655]警告：正在主线程上执行长时间运行的操作。
if Reachability.isConnectedToNetwork() {
self.skip = 0
//--RESETTING THE ARRAYS FOR DATA--\\
self.contactText.removeAll(keepCapacity: true)
self.names.removeAll(keepCapacity: true)
self.images.removeAll(keepCapacity: true)
self.prices.removeAll(keepCapacity: true)
self.sizes.removeAll(keepCapacity: true)
self.conditions.removeAll(keepCapacity: true)
self.dates.removeAll(keepCapacity: true)
self.ids.removeAll(keepCapacity: true)
self.createdBy.removeAll(keepCapacity: true)
//--RESET THE USERS LOCATION WHEN HE REFRESHES IN CASE OF A DARASTIC MOVE IN LOCATION--\\
let userGeoPoint = PFUser.currentUser()!["location"] as! PFGeoPoint
//--GETTING ALL OF THE OBJECTS WITHIN 60 MILES OF USERS CURRENT LOCATION--\\
let query = PFQuery(className:"Shoes")
query.whereKey("Location", nearGeoPoint: userGeoPoint, withinMiles: 60)
let user = PFUser.currentUser() as PFUser!
let array: AnyObject? = user["blockedUsers"]
if(array != nil){
query.whereKey("createdBy", notContainedIn: array! as! [AnyObject])
}
query.limit = 50
query.orderByDescending("createdAt")
query.skip = self.skip
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
print("Successfully retrieved \(objects!.count) scores.")
for object in objects! {
if let dateCreated = object.createdAt as NSDate? {
self.dates.append(dateCreated)
}
self.contactText.append(object["Contact"] as! String)
self.descriptions.append(object["Description"] as! String)
self.names.append(object["Name"] as! String)
if object["price"] as! String == "" || object["price"] == nil{
self.prices.append("Negotiable")
}else{
self.prices.append(object["price"] as! String)
}
if object["size"] as! String == "" || object["size"] == nil{
self.sizes.append("N/A")
}else{
self.sizes.append(object["size"] as! String)
}
if object["conditionType"] as! String == "" || object["conditionType"] == nil{
self.conditions.append("N/A")
}else{
self.conditions.append(object["conditionType"] as! String)
}
self.ids.append(object.valueForKey("objectId") as! String)
self.createdBy.append(object["createdBy"] as! String)
let imageFile = object["imageFile"] as! PFFile
let imageData = imageFile.getData()
if (imageData != nil) {
let image = UIImage(data:imageData!)
self.images.append(image!)
}
}
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
})
}
else {
print(error)
}
self.refresher.endRefreshing()
}
self.skip+=50
} else {
print("Internet connection not available")
self.refresher.endRefreshing()
let alert = UIAlertView(title: "No Internet connection", message: "Please ensure you are connected to the Internet", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}