好吧，所以我不确定我的Table视图是怎么发生的，但是现在我把镜像加载到它上面似乎有些奇怪。起初，它运行顺利，但现在我在ios 9工作，滚动很糟糕
我曾经使用优化来减少这种情况（请记住，它们并没有真正帮助。） - 删除透明对象并将其设置为默认背景 - 重复使用的表格单元格 - 试图使用质量较低的图像
这是我的代码
import UIKit
class mainVC: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var resultsTable: UITableView!
@IBOutlet weak var menuButton:UIBarButtonItem!
var deleteArray = [String]()
var followArray = [String]()
var resultsLocationArray = [String]()
var datetextfielArray = [String]()
var imageDates = [String]()
var resultsNameArray = [String]()
var resulltsImageFiles = [PFFile]()
var resultsTweetArray = [String]()
var resultsHasImageArray = [String]()
var resultsTweetImageFiles = [PFFile?]()
var refresher:UIRefreshControl!
override func viewDidLoad() {
super.viewDidLoad()
if self.revealViewController() != nil {
menuButton.target = self.revealViewController()
menuButton.action = "revealToggle:"
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
// Uncomment to change the width of menu
//self.revealViewController().rearViewRevealWidth = 62
}
let theWidth = view.frame.size.width
let theHeight = view.frame.size.height
resultsTable.frame = CGRectMake(0, 0, theWidth, theHeight)
let tweetBtn = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Compose, target: self, action: Selector("tweetBtn_click"))
let searchBtn = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Search, target: self, action: Selector("searchBtn_click"))
let buttonArray = NSArray(objects: tweetBtn, searchBtn)
self.navigationItem.rightBarButtonItems = buttonArray as? [UIBarButtonItem]
refresher = UIRefreshControl()
refresher.tintColor = UIColor.blackColor()
refresher.addTarget(self, action: "refresh", forControlEvents: UIControlEvents.ValueChanged)
self.resultsTable.addSubview(refresher)
}
func refresh() {
print("refresh table")
refreshResults()
}
func refreshResults() {
followArray.removeAll(keepCapacity: false)
resultsNameArray.removeAll(keepCapacity: false)
resulltsImageFiles.removeAll(keepCapacity: false)
resultsTweetArray.removeAll(keepCapacity: false)
resultsLocationArray.removeAll(keepCapacity: false)
resultsHasImageArray.removeAll(keepCapacity: false)
resultsTweetImageFiles.removeAll(keepCapacity: false)
datetextfielArray.removeAll(keepCapacity: false)
let followQuery = PFQuery(className: "follow")
followQuery.whereKey("user", equalTo: PFUser.currentUser()!.username!)
followQuery.addDescendingOrder("createdAt")
let objects = followQuery.findObjects()
for object in objects! {
self.followArray.append(object.objectForKey("userToFollow") as! String)
}
let query:PFQuery = PFQuery(className: "tweets")
query.whereKey("userName", containedIn: followArray)
query.addDescendingOrder("createdAt")
query.findObjectsInBackgroundWithBlock {
(objects:[AnyObject]?, error:NSError?) -> Void in
if error == nil {
for object in objects! {
self.resultsNameArray.append(object.objectForKey("profileName") as! String)
self.resulltsImageFiles.append(object.objectForKey("photo") as! PFFile)
self.resultsTweetArray.append(object.objectForKey("tweet") as! String)
//resultsLocationArray
self.resultsLocationArray.append(object.objectForKey("tweetlocation") as! String)
self.resultsHasImageArray.append(object.objectForKey("hasImage") as! String)
self.resultsTweetImageFiles.append(object.objectForKey("tweetImage") as? PFFile)
self.datetextfielArray.append(object.objectForKey("datetextfield") as! String)
self.resultsTable.reloadData()
}
self.refresher.endRefreshing()
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(animated: Bool) {
self.navigationController?.navigationBarHidden = false
super.viewWillAppear(animated)
let nav = self.navigationController?.navigationBar
nav?.barStyle = UIBarStyle.Black
nav?.tintColor = UIColor.whiteColor()
nav?.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()]
self.navigationItem.hidesBackButton = true
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// Return the number of sections.
return 1
}
override func viewDidAppear(animated: Bool) {
refreshResults()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return resultsNameArray.count
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if resultsHasImageArray[indexPath.row] == "yes" {
return self.view.frame.size.width + 130
} else {
return 130
}
}
//var theDtS = dtFormater.stringFromDate(self.dateArray[i])
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:mainCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! mainCell
cell.tweetImg.hidden = true
cell.locationTxt.text = self.resultsLocationArray[indexPath.row]
cell.profileLbl.text = self.resultsNameArray[indexPath.row]
cell.messageTxt.text = self.resultsTweetArray[indexPath.row]
cell.datetextfield.text = self.datetextfielArray[indexPath.row]
resulltsImageFiles[indexPath.row].getDataInBackgroundWithBlock {
(imageData:NSData?, error:NSError?) -> Void in
//resultsLocationArray
if error == nil {
let image = UIImage(data: imageData!)
cell.imgView.image = image
}
}
if resultsHasImageArray[indexPath.row] == "yes" {
let theWidth = view.frame.size.width
cell.tweetImg.frame = CGRectMake(0, 0, theWidth, theWidth)
cell.tweetImg.hidden = false
resultsTweetImageFiles[indexPath.row]?.getDataInBackgroundWithBlock({
(imageData:NSData?, error:NSError?) -> Void in
if error == nil {
let image = UIImage(data: imageData!)
cell.tweetImg.image = image
}
})
}
return cell
}
func tweetBtn_click() {
print("tweet pressed")
self.performSegueWithIdentifier("gotoTweetVCFromMainVC", sender: self)
}
func searchBtn_click() {
print("search pressed")
self.performSegueWithIdentifier("gotoUsersVCFromMainVC", sender: self)
}
}