我正在处理由其他开发人员创建的应用程序 . 它是一个完整的应用程序,有很多viewControllers,变量和出口 .
从服务器(例如200)加载太多图像后,我一直在崩溃 . 我只在“打印区域”中收到此消息:“应用程序因内存问题而终止” .
我使用库“SDWebImage”来加载图像 . 我试图使用Instruments Allocations和Leaks找到内存泄漏 . 我还使用了Memory Graph Debugger,其中没有显示我的应用程序中的泄漏 .
然而,当我弹出View Controller(DetailVC)时,它永远不会触发deinit方法,当发生这种情况时我会将消息打印出来 .
我搜索了很多,但没有发誓 . 我在Stackoverflow上看过这些:
App Extension "Terminated due to memory issue"
App terminated due to memory issue
通过我的搜索,我反复看到视图控制器必须由另一个视图控制器引用的响应,并且此视图控制器(DetailVC)强烈引用另一个视图控制器 .
虽然视图控制器的文件太大而我可能错过了一些东西,但我找不到这种情况 .
由于文件非常庞大,因此很难通过应用程序查找强弱参考文件 .
有没有一种简单的方法(或者说很难)找到罪魁祸首并解决我的问题 .
谢谢
代码很大(95000个字符)并包含敏感信息,因此不适合在此处发布 . 虽然我可以发帖部分但你应该要求它 .
这是DetailVC viewDidLoad的代码:
import UIKit
import FTIndicator
import Cosmos
import Firebase
import MapKit
import YouTubePlayer
//MARK:- Gallery Collection Cell
class GalleryCollectionCell:UICollectionViewCell
{
@IBOutlet weak var imgViewShop: UIImageView!
override func awakeFromNib()
{
super.awakeFromNib()
}
}
//MARK:- Service Collection Cell
class ServiceCollectionCell:UICollectionViewCell
{
@IBOutlet weak var imgViewService: UIImageView!
@IBOutlet weak var lblService: UILabel!
override func awakeFromNib()
{
super.awakeFromNib()
}
}
@IBAction func btnBackAction(_ sender: Any)
{
self.navigationController?.popViewController(animated: true)
SDImageCache.shared().clearMemory()
SDImageCache.shared().clearDisk()
}
//MARK:- Detail Main Class
class DetailVC: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout,UITableViewDataSource, UITableViewDelegate,RateFinalDelegate, PhotoDicDelegate
{
//MARK:- Outlets
@IBOutlet weak var tblViewRate: UITableView!
@IBOutlet weak var tblViewService: UITableView!
@IBOutlet weak var lblServices: UILabel!
@IBOutlet weak var collViewGallery: UICollectionView!
//@IBOutlet weak var collViewService: UICollectionView!
@IBOutlet weak var constTableViewHeight: NSLayoutConstraint!
@IBOutlet weak var constTlbViewServiceHeight: NSLayoutConstraint!
@IBOutlet weak var imgViewShop: UIImageView!
@IBOutlet weak var lblShopName: UILabel!
//@IBOutlet weak var lblShopNameDetail: UILabel!
@IBOutlet weak var btnFavourites: UIButton!
@IBOutlet weak var viewStar: CosmosView!
@IBOutlet weak var lblReviewCount: UILabel!
@IBOutlet weak var btnShopStatus: UIButton!
@IBOutlet weak var lblShopOnline: UILabel!
// @IBOutlet weak var lblDetailText: UILabel!
@IBOutlet weak var btnShopRate: UIButton!
@IBOutlet weak var lblShopAddress: UILabel!
@IBOutlet weak var lblShopWebsite: UILabel!
@IBOutlet weak var lblShopView: UILabel!
@IBOutlet weak var lblShopOpenStatus: UILabel!
//@IBOutlet weak var lblPhone1: UILabel!
@IBOutlet weak var lblShopDetail: UILabel!
// @IBOutlet weak var btnFacebook: UIButton!
// @IBOutlet weak var btnSnapchat: UIButton!
// @IBOutlet weak var btnInstagram: UIButton!
// @IBOutlet weak var btnTwitter: UIButton!
// @IBOutlet weak var btnYoutube: UIButton!
// @IBOutlet weak var btnVivo: UIButton!
// @IBOutlet weak var btnGoogle: UIButton!
@IBOutlet weak var lblSat: UILabel!
@IBOutlet weak var lblSun: UILabel!
@IBOutlet weak var lblMon: UILabel!
@IBOutlet weak var lblTues: UILabel!
@IBOutlet weak var lblWed: UILabel!
@IBOutlet weak var lblThru: UILabel!
@IBOutlet weak var lblFri: UILabel!
@IBOutlet weak var lblSatText: UILabel!
@IBOutlet weak var lblSunText: UILabel!
@IBOutlet weak var lblMonText: UILabel!
@IBOutlet weak var lblTuesText: UILabel!
@IBOutlet weak var lblWedText: UILabel!
@IBOutlet weak var lblThruText: UILabel!
@IBOutlet weak var lblFriText: UILabel!
@IBOutlet weak var lblworkingHour: UILabel!
@IBOutlet weak var lblGallery: UILabel!
@IBOutlet weak var lblReviews: UILabel!
@IBOutlet weak var btnSeeMore: UIButton!
@IBOutlet weak var btnBack: UIButton!
@IBOutlet weak var viewMain: UIView!
@IBOutlet weak var viewSuper: UIView!
@IBOutlet weak var viewService: UIView!
@IBOutlet weak var btnWebsite: UIButton!
@IBOutlet weak var btnPhone1: UIButton!
@IBOutlet weak var btnPhone2: UIButton!
@IBOutlet weak var btnPhone3: UIButton!
@IBOutlet weak var constPhone1Height: NSLayoutConstraint!
@IBOutlet weak var constPhone2Height: NSLayoutConstraint!
@IBOutlet weak var constPhone3Height: NSLayoutConstraint!
@IBOutlet weak var constPhoneViewHeight: NSLayoutConstraint!
@IBOutlet weak var constViewScrollHeight: NSLayoutConstraint!
@IBOutlet weak var scrollSocial: UIScrollView!
// @IBOutlet weak var btnSocialLink: UIButton!
@IBOutlet weak var btnGallery: UIButton!
@IBOutlet weak var constViewServiceHeight: NSLayoutConstraint!
//For Photo Class
@IBOutlet weak var tblViewHeader: UITableView!
@IBOutlet weak var switchGallery: UISwitch!
@IBOutlet weak var constTableViewGalleryHeight: NSLayoutConstraint!
var albumListArray = [AlbumListData]()
//For Video Class
@IBOutlet weak var collectionViewVideos: UICollectionView!
@IBOutlet weak var constCollViewVideoHeight: NSLayoutConstraint!
var videoDataArray = [VideoListData]()
var switchStatus = Bool()
//MARK:- Variables
let globalConstants = GlobalConstants()
var UserData = UserDataValue()
var reviewDataArray = [Review]()
var galleryDataArray = [Gallery]()
var serviceDataArray = [Service]()
var ShopId = String()
var favStatus = String()
var ShopStatus = String()
var Latitude = String()
var Longitude = String()
var strFacebook = String()
var strInstagram = String()
var NotifyId = String()
var strTwitter = String()
var strSnapchat = String()
var strYoutube = String()
var strGoogle = String()
var strVimeo = String()
var chatStatus = Bool()
var isfirstTime = Bool()
var receiverId = ""
var receiverImage = ""
var receiverName = ""
var strWebsite = ""
var shopOwnerId = ""
var ShopUnqueId = ""
var HideChatStatus = ""
var IsChatCreateScreen = ""
var strPhone1Number = String()
var strPhone2Number = String()
var strPhone3Number = String()
var RateText = Bool()
var ShopDeliveryServiceItself = Bool()
var CitySelectedId = String()
var OneToOneChatUserData : NSDictionary = [:]
var ShopString = "1159,1160,1162,1166,1167,1176,1178,1179,1180,1182,1184,1185,1186,1187,1188,1189,1190,1191,1192,1193,1194,1199,1202,1203,1206,1208,1209,1210,1214,1216,1217,1218,1224,1225,1227,1230,1232,1233,1234,1235,1236,1238,1239,1240,1242,1243,1244,1245,1246,1247,1248,1250,1252,1253,1255,1258,1259,1263,1264,1265,1266,1269,1270,1272,1275,1276,1277,1278,1279,1280,1281,1282,1283,1285,1298,1299,1302";
//MARK:- View Life Cycle
override func viewDidLoad()
{
super.viewDidLoad()
// collViewGallery.dataSource = self
// collViewGallery.delegate = self
// collViewService.dataSource = self
// collViewService.delegate = self
btnShopStatus.setTitle(" CHAT".localiz(), for: .normal)
btnSeeMore.setTitle("See More".localiz(), for: .normal)
btnShopRate.setTitle("RATE".localiz(), for: .normal)
btnGallery.setTitle("Gallery".localiz(), for: .normal)
lblworkingHour.text = "Working Hours:".localiz()
lblServices.text = "Services".localiz()
lblGallery.text = "Gallery".localiz()
lblReviews.text = "REVIEWS".localiz()
//lblDetailText.text = "DETAILS".localiz()
lblSatText.text = "Saturday".localiz()
lblSunText.text = "Sunday".localiz()
lblMonText.text = "Monday".localiz()
lblTuesText.text = "Tuesday".localiz()
lblWedText.text = "Wednesday".localiz()
lblThruText.text = "Thursday".localiz()
lblFriText.text = "Friday".localiz()
viewStar.settings.fillMode = .precise
self.navigationItem.title = globalConstants.detailText
tblViewRate.register(UINib(nibName: "RateTableVCell", bundle: nil), forCellReuseIdentifier: "RateTableVCell")
tblViewService.register(UINib(nibName: "ServiceTableCell", bundle: nil), forCellReuseIdentifier: "ServiceTableCell")
tblViewHeader.register(UINib(nibName: "SubCatHeaderTVC", bundle: nil), forCellReuseIdentifier: "SubCatHeaderTVC")
tblViewHeader.dataSource = self
tblViewHeader.delegate = self
tblViewHeader.estimatedRowHeight = 120
tblViewHeader.rowHeight = UITableViewAutomaticDimension
tblViewService.dataSource = self
tblViewService.delegate = self
tblViewService.estimatedRowHeight = 50
tblViewService.rowHeight = UITableViewAutomaticDimension
self.constTlbViewServiceHeight.constant = 20
collectionViewVideos.register(UINib(nibName: "VideoCollViewCell", bundle: nil), forCellWithReuseIdentifier: "VideoCollViewCell")
collectionViewVideos.dataSource = self
collectionViewVideos.delegate = self
collectionViewVideos.reloadData()
switchStatus = false
switchGallery.setOn(false, animated: true)
//self.constViewServiceHeight.constant = 20
tblViewRate.dataSource = self
tblViewRate.delegate = self
tblViewRate.estimatedRowHeight = 100
tblViewRate.rowHeight = UITableViewAutomaticDimension
//self.constTableViewGalleryHeight.constant = 20
self.constTableViewHeight.constant = 20
// self.tblViewHeader.isHidden = false
// self.collectionViewVideos.isHidden = true
// self.constCollectionViewHeight.constant = 30
ShopStatus = ""
self.addBackButton()
UserDefaults.standard.set(ShopId, forKey: "ShopValueId")
UserDefaults.standard.synchronize()
isfirstTime = true
viewSuper.backgroundColor = UIColor.lightGray
viewMain.isHidden = true
if LanguageManger.shared.currentLanguage == .en
{
lblServices.textAlignment = .left
btnBack.setImage(UIImage(named:"back"), for: .normal)
}
else
{
lblServices.textAlignment = .right
btnBack.setImage(UIImage(named:"ReverseBack"), for: .normal)
}
// if KAppDelegate.isUserLoggedIn()
// {
// let userDic = UserDefaults.standard.value(forKey: "UserData") as! [String:Any]
// self.UserData = UserDataValue.init(fromDictionary: userDic)
// UserId = self.UserData.id!
// UserName = self.UserData.name!
// }
if KAppDelegate.isUserLoggedIn()
{
let userDic = UserDefaults.standard.value(forKey: "UserData") as! [String:Any]
self.UserData = UserDataValue.init(fromDictionary: userDic)
CitySelectedId = self.UserData.city!
}
else
{
if UserDefaults.standard.value(forKey: "CitySelectedId") != nil
{
CitySelectedId = UserDefaults.standard.value(forKey: "CitySelectedId") as! String
}
else
{
CitySelectedId = "1"
}
}
ShopDetailAPIMethod()
}
override func viewWillAppear(_ animated: Bool)
{
self.navigationController?.navigationBar.isHidden = true
}
override func viewWillDisappear(_ animated: Bool)
{
self.IsChatCreateScreen = ""
self.navigationController?.navigationBar.isHidden = false
}
// override var preferredStatusBarStyle: UIStatusBarStyle
// {
// return .default
// }
//MARK:- Photo Dic Delegate Method
//MARK:- CreateNewChat Method
}
这是如何实例化DetailVC:
@objc func methodOfNotification(notification: Notification)
{
if UserDefaults.standard.value(forKey: "ShopValueId") != nil
{
let detailVC = self.storyboard?.instantiateViewController(withIdentifier: "DetailVC") as! DetailVC
detailVC.ShopId = UserDefaults.standard.value(forKey: "ShopValueId") as! String
self.navigationController?.pushViewController(detailVC, animated: true)
}
}
这是场景:
我在subCategoryVC中我点击了一个collectionView单元格,这实例化了DetailVC . 在DetailVC中,我单击seeAll按钮以在集合视图中加载图像(这是使用此方法使用SDWebImage完成的:
升
let imageStringURL = ShopDetailData.coverImage!
imgViewShop.sd_setShowActivityIndicatorView(true)
imgViewShop.sd_setIndicatorStyle(.gray)
imgViewShop.sd_setImage(with: NSURL(string:imageStringURL)! as URL, placeholderImage:UIImage(named:"noimage") , options: .refreshCached, completed: nil)
当我点击btnBack(后退按钮)并使用 navigationContrller.popViewController()
弹出视图控制器时,这是应该在"print area"中打印deinit消息的地方,但这绝不会发生 .
此外,当我打开2或3个detailVC并按下seeAll按钮时,应用程序崩溃,“打印区域”显示
“应用因内存问题而终止” .
我刚用仪器来检查内存泄漏 . 事实证明,有一个泄漏并且具有以下细节:
泄露的对象= _swiftStringStorage<UInt16>
负责的库= libswiftCore.dylib
负责的框架= swift_slowAlloc
2 回答
应用程序允许有限的内存 . 我想在800mb之后,应用程序因内存问题而关闭 . 这不是为一个控制器下载200个图像的真实方式,但您可以使用tableview with dequereuaseble和sdwebimage或kingfisher . 您也可以使用缩略图,因为您不需要在imageview中显示1 MB图像,这不是必需的 .
你可能有一个保留周期 . 这意味着ViewController的一些子视图具有对ViewController本身或对ViewController具有强引用的另一个对象的强引用 . 发生这种情况时,即使弹出ViewController,它也不会被销毁,直到子视图被销毁,在ViewController存在时永远不会销毁 .
如果是这种情况,解决方案是在子视图中搜索此循环引用,并在引用ViewController的变量中添加“弱” . 搜索将“self”分配给变量或在机箱内使用“self”的位置可能会有所帮助 .