我正在处理由其他开发人员创建的应用程序。这是一个完整的应用程序，有很多 viewControllers 、变量和导出。
从服务器加载太多图像(例如 200 个)后，我不断发生崩溃。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。我尝试使用仪器分配和泄漏来查找内存泄漏。我还使用了内存图形调试器，但它们都没有在我的应用程序中显示泄漏。
但是，当我弹出 View Controller ( DetailVC ) 时，它永远不会触发 deinit 方法，在这种情况下，我已经在该方法中放置了要打印的消息。
我查了很多资料都没有结果。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，我反复看到这样的响应: View Controller 必须由另一个 View Controller 引用，并且此 View Controller (DetailVC) 强烈引用另一个 View Controller 。
我找不到这种情况，尽管 View Controller 的文件太大并且我可能错过了一些东西。
由于文件非常大，因此很难浏览应用程序并查找强引用和弱引用。
有没有一种简单的方法(或困难的方法)来找到罪魁祸首并解决我的问题。
谢谢
该代码很大(95000 个字符)并且包含敏感信息，因此不适合在此处发布。如果你要求的话我可以发布其中的一部分。
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
}
这就是实例化 DetailVC 的方法:
@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，单击 collectionView 单元格，这会实例化 DetailVC。在 DetailVC 中，我单击 seeAll 按钮以在 Collection View 中加载图像(这是使用 SDWebImage 使用以下方法完成的:
l
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)
当我单击 btnBack(后退按钮)并使用 navigationContrller.popViewController() 弹出 View Controller 时这是应该在“打印区域”中打印 deinit 消息的地方，但这种情况永远不会发生。
此外，当我打开 2 或 3 个DetailVC 并按下 seeAll 按钮时，应用程序崩溃并显示“打印区域”
"app terminated due to memory issue".
我只是使用 Instruments 来检查内存泄漏。事实证明，存在一次泄漏，具体细节如下:
泄露的对象= _swiftStringStorage<UInt16>
负责图书馆=libswiftCore.dylib
责任框架=swift_slowAlloc
最佳答案
应用程序允许的内存有限。我猜想在 800mb 之后，应用程序会因内存问题而关闭。这不是为一个 Controller 下载 200 个图像的真正方法，但您可以将 tableview 与 dequereuaseble 和 sdwebimage 或 kingfisher 一起使用。您还可以使用缩略图，因为您不需要在 imageview 中显示 1 mb 的图像，这不是不必要的。
关于ios - 为什么我的应用程序会因内存问题而崩溃？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53691081/