iOS - 由于内存问题错误而终止

Question

所以我正在进行网络调用以检索图像并使用它来展示一种视频。过了一会儿，我可以看到内存丧失和能量影响:

一段时间后，我的应用崩溃了，我得到:“由于内存问题错误而终止”

在此之前，我从图像调用方法中得到了这个错误:“来自 dataResponse 的错误:操作无法完成。设备上没有剩余空间”

这是我使用的两种方法:

class InstallationViewController: BaseViewController {

    func imageCaller(url: String , success: @escaping (UIImage) -> Void, failure: @escaping () -> Void) {
    let handler = AuthenticateHandler()
    self.urlSession = URLSession(configuration: URLSessionConfiguration.default, delegate: handler, delegateQueue: OperationQueue.main)

    self.imageThumbnailTask = urlSession?.dataTask(with: URL(string:url)!) { data, res, err in

        if err != nil {
            print("error from dataResponse:\(err?.localizedDescription ?? "Response Error")")
            failure()
            return
        }
        DispatchQueue.main.async {

            if let imageData = data, let image = UIImage(data: imageData) {
                success(image)
                URLCache.shared.removeAllCachedResponses()

            }
        }
    }
    self.imageThumbnailTask?.resume()
}

 func imageThumbnailcall() {
    self.indicaotrTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.HandleOverTime), userInfo: nil, repeats: false)

    self.imageCaller( url: self.isShowingThermal ? self.thermalUrl : self.visualUrl, success: { (image) in

        self.indicaotrTimer?.invalidate()

        DispatchQueue.main.async{
            self.imageLoaderIndicator.stopAnimating()
            self.backGroundImageView.image = image
        }
        if self.isInVC {
            self.imageThumbnailcall()
        }
    }) {
        self.imageLoaderIndicator.stopAnimating()
    }
}

值得一提的是这一行:

   let handler = AuthenticateHandler()
    self.urlSession = URLSession(configuration: URLSessionConfiguration.default, delegate: handler, delegateQueue: OperationQueue.main)

摘要协议(protocol)

Answer 1

看起来您在 imageThumbnailcall 函数的闭包中有一个保留周期。闭包创建了对 self 的强引用，并且由于它是一个递归函数，您将很快耗尽内存。您需要在闭包中将 self 捕获为 [weak self] 或 [unowned self]。使用 [unowned self] 的示例:

func imageThumbnailcall() {
    self.indicaotrTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.HandleOverTime), userInfo: nil, repeats: false)

    self.imageCaller( url: self.isShowingThermal ? self.thermalUrl : self.visualUrl, success: { [unowned self] (image) in

    self.indicaotrTimer?.invalidate()

    DispatchQueue.main.async{
        self.imageLoaderIndicator.stopAnimating()
        self.backGroundImageView.image = image
    }
    if self.isInVC {
        self.imageThumbnailcall()
    }
    }) {
        self.imageLoaderIndicator.stopAnimating()
    }
}

如果你想了解更多