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我的确喜欢新闻，我遇到以下问题，例如，如果用户上传超过300条新闻，那么应用程序已经占用超过300兆字节的内存。一旦在测试中，我确实得到didReceiveMemoryWarning，它只帮助完全清理dataSource。我也使用Kingfisher来缓存图像。这种情况的最佳方式是什么？缓存第一个数据，如果用户将返回顶部（到最新的数据），然后从缓存中加载它们，或者如果有更好的方法？谢谢。Kingfisher将数据缓存在RAM中
更新：这是新闻JSON模型。
[ “peopleProperties”： “numberOfPeopleDescription”： “没有人在这里”， “numberOfPeople”：0， “availableSeats”：0]， “isPrivateStatus”：假的， “additionalInfo”： “注意”： “” ]，“ownerID”：“”，“ticketsInfo”：[“tickets”：[]]，“isTest”：false，“isNewPendingRequest”：false，“dateProperties”：[“isEditable”：true，“iso8601” “，”day“：”“，”endTimeStamp“：0.0，”isFlexDate“：true，”isFlexTime“：true，”timeStamp“：0.0]，”boolProperties“：[”isPartnerGeneratedCard“：false，”isAutoGeneratedCard“：true ，“isUserCreatedCard”：false，“isAdminCreatedCard”：false]，“location”：[“formattedAddress”：“692 N Robertson Blvd（位于Santa Monica Blvd），美国加利福尼亚州西好莱坞90069”，“fullLocationName” 692 N Robertson Blvd“，”coordinate“：[”longitude“：-118.38528500025966，”latitude“：34.083373986214625]]，”id“：”“，”photoURLsProperties“：[”placePhotoURLs“：[例如“]，”placeLogoURLs“：[]]，”services“：[”serviceURL“：”“，”serviceID“：”41cf5080f964a520a61e1fe3“，”index“：1]，”version“：1，修道院食品&酒吧”， “OWNERNAME”： “”， “手机”：[：]
更新1.有时涉及到应用程序崩溃。我的测试控制器
import UIKit
import SVProgressHUD
class CardTestTableViewController: UITableViewController {
// MARK: - Managers
fileprivate let firCardDatabaseManager = FIRCardDatabaseManager()
fileprivate let apiManager = ableCardsAPIManager()
// MARK: - API Manager's properties
fileprivate var firstCardsCount = 0
fileprivate var isSecondTypeRequestLaunch = false
/// Main cards array
fileprivate var cardsModels = [CardModel]()
fileprivate var firCardsModels = [CardModel]()
fileprivate var backendCardsModels = [CardModel]()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
definesPresentationContext = true
requestAllData()
// table view
registerCells()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationController?.setNavigationBarHidden(false, animated: false)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
debugPrint("didReceiveMemoryWarning")
cardsModels.removeAll()
tableView.reloadData()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if cardsModels.count > 0 {
debugPrint("cardsModels.first!.toJSON()", cardsModels.first!.toJSON(), "cardsModels.first!.toJSON()")
}
return cardsModels.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = cardTestTableViewCell(tableView, indexPath: indexPath)
let lastElement = cardsModels.count - 15
if indexPath.row == lastElement {
secondRequest(indexPath.row)
}
return cell
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 298
}
}
extension CardTestTableViewController {
fileprivate func registerCells() {
let nib = UINib(nibName: CardTestTableViewCell.defaultReuseIdentifier, bundle: Bundle.main)
tableView.register(nib, forCellReuseIdentifier: CardTestTableViewCell.defaultReuseIdentifier)
}
}
// MARK: - Cells
extension CardTestTableViewController {
fileprivate func cardTestTableViewCell(_ tableView: UITableView, indexPath: IndexPath) -> CardTestTableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: CardTestTableViewCell.defaultReuseIdentifier, for: indexPath) as! CardTestTableViewCell
let card = cardsModels[indexPath.row]
cell.setupData(card)
return cell
}
}
// MARK: - Requests
extension CardTestTableViewController {
@objc fileprivate func requestAllData() {
let requestGroup = DispatchGroup()
if let topViewController = UIApplication.topViewController() {
if topViewController.isKind(of: CardViewController.self) {
SVProgressHUD.show()
}
}
firCardsModels.removeAll()
backendCardsModels.removeAll()
requestGroup.enter()
firCardDatabaseManager.getCardModelsByUserLocation(success: { [weak self] (userCardsModels) in
debugPrint("Finish +++ fir", userCardsModels.count)
self?.firCardsModels = userCardsModels
requestGroup.leave()
}) { (error) in
// TODO: - Think about it: Do not show an error, because we have cards with FourSquare
debugPrint("FIRCardDatabaseManager error", error.localizedDescription)
requestGroup.leave()
}
requestGroup.enter()
apiManager.requestCards(10, secondRequestLimit: 50, isFirstRequest: true, success: { [weak self] (cards) in
self?.backendCardsModels = cards
requestGroup.leave()
}) { (error) in
requestGroup.leave()
}
requestGroup.notify(queue: .main) { [weak self] in
guard let _self = self else { return }
_self.cardsModels.removeAll()
_self.cardsModels.append(contentsOf: _self.firCardsModels)
_self.cardsModels.append(contentsOf: _self.backendCardsModels)
self?.tableView.reloadData()
// for api manager
self?.firstCardsCount = _self.cardsModels.count
SVProgressHUD.dismiss()
}
}
fileprivate func secondRequest(_ index: Int) {
// the second request
debugPrint("swipe index", index, "firstCardsCount", firstCardsCount)
// This is for how much to the end of the deck, we ask for more cards.
let muchMoreIndex = 15
let checkNumber = firstCardsCount-1 - index - muchMoreIndex
debugPrint("checkNumber", checkNumber)
if checkNumber == 0 || checkNumber < 0 {
guard !isSecondTypeRequestLaunch else { return }
isSecondTypeRequestLaunch = true
apiManager.requestCards(0, secondRequestLimit: 50, isFirstRequest: false, success: { [weak self] (backendCards) in
DispatchQueue.main.async {
guard let _self = self else { return }
_self.cardsModels.append(contentsOf: backendCards)
_self.firstCardsCount = _self.cardsModels.count
_self.isSecondTypeRequestLaunch = false
_self.tableView.reloadData()
}
}, fail: { [weak self] (error) in
self?.isSecondTypeRequestLaunch = false
})
}
}
}
import UIKit
import Kingfisher
class CardTestTableViewCell: UITableViewCell {
@IBOutlet private weak var titleLabel: UILabel!
@IBOutlet private weak var cardImageView: UIImageView!
@IBOutlet private weak var profileImageView: UIImageView!
override func prepareForReuse() {
cardImageView.image = nil
profileImageView.image = nil
}
func setupData(_ card: CardModel) {
downloadImages(card)
setupLabelsData(card)
}
private func downloadImages(_ card: CardModel) {
if let placeAvatarURLString = card.photoURLsProperties.placePhotoURLs.first {
if let placeAvatarURL = URL(string: placeAvatarURLString) {
cardImageView.kf.indicatorType = .activity
cardImageView.kf.setImage(with: placeAvatarURL)
} else {
cardImageView.image = UIImage(named: "CardDefaultImage")
}
} else if let eventLogoURLPath = card.photoURLsProperties.placeLogoURLs.first {
if let url = URL(string: eventLogoURLPath) {
cardImageView.kf.indicatorType = .activity
cardImageView.kf.setImage(with: url)
} else {
cardImageView.image = UIImage(named: "CardDefaultImage")
}
} else {
cardImageView.image = UIImage(named: "CardDefaultImage")
}
guard card.boolProperties.isAutoGeneratedCard != true && card.boolProperties.isAdminCreatedCard != true else {
profileImageView.image = #imageLiteral(resourceName: "ProfileDefaultIcon")
return
}
let firImageDatabaseManager = FIRImageDatabaseManager()
firImageDatabaseManager.downloadCardUserProfileImageBy(card.ownerID) { [weak self] (url, error) in
DispatchQueue.main.async {
guard error == nil else {
self?.profileImageView.image = #imageLiteral(resourceName: "ProfileDefaultIcon")
return
}
guard let _url = url else {
self?.profileImageView.image = #imageLiteral(resourceName: "ProfileDefaultIcon")
return
}
self?.profileImageView.kf.indicatorType = .activity
self?.profileImageView.kf.setImage(with: _url)
}
}
}
private func setupLabelsData(_ card: CardModel) {
titleLabel.text = card.title
}
}
更新2。当我注释掉与Kingfisher框架相关的代码时，就没有内存泄漏和应用程序崩溃。
使用SDWebImage。 – KKRocks
嗨@KKRocks请告诉我，在什么翠鸟不适合？这个相同的库只能快速写入。接下来我想问一下，你认为这不是一个大型数据集（目前最多可容纳1000个模型）的问题。 – Alexander
您能否分享您的新闻提要数据的示例单个对象。 –