Question

在得知内存泄漏可能是导致我的iOS应用安装到手机后数小时崩溃的原因之后，我观看并阅读了有关内存泄漏的视频/文章，尤其是Xcode以及如何调试它们。我一直在尝试使用Memory Debugger和Xcode泄漏工具，但是没有运气。我想知道如何找到泄漏源？我所附的屏幕截图显示了许多泄漏之一，它从未让我深入了解图片所显示的内容。在视频中，Xcode使用回溯将它们带到引起问题的代码行，但是在任何情况下我都无法做到这一点。我还注意到泄漏来自UIKIT，这正常吗？感谢任何帮助，因为我是Xcode的新手。

Here is the image.

这是我最初在视图控制器中登录时得到的一些代码。在第二张图片中，您将看到唯一一个存在内存泄漏的视图，但是，我也无法对此进行更深入的研究。 Second image of memory leak from InitialLogInVC

import UIKit

class IntialLoginInViewController: UIViewController {
    @IBOutlet weak var backgroundAlbumArt: UIImageView!
    @IBOutlet weak var foregroundAlbumArt: UIImageView!
    @IBOutlet weak var musicNameLabel: UILabel!
    private weak var imageOne = UIImage(named: "taste.jpg")
    private weak var imageTwo = UIImage(named: "NavReckless.jpg")
    private weak var imageThree = UIImage(named: "watch.jpg")
    private weak var imageFour = UIImage(named: "juicewrld.jpg")

    lazy var imageInformation = [(name:"Taste - Tyga", image:imageOne),(name:"Reckless - Nav", image: imageTwo),(name:"Watch - Travis Scott", image: imageThree), (name:"Goodbye & Good Riddance - Juice Wrld", image: imageFour)]
    private var currentIndex = 0
    static var spotifySession: AnyObject?

    override func viewDidLoad() {
        super.viewDidLoad()
        foregroundAlbumArt.image = imageOne
        backgroundAlbumArt.image = imageOne
        musicNameLabel.text = imageInformation[0].name
        let _ = Timer.scheduledTimer(timeInterval: 10.0, target: self, selector: #selector(imageRefresh), userInfo: nil, repeats: true)
    }

    override var preferredStatusBarStyle : UIStatusBarStyle {
        return .lightContent
    }

    @objc func imageRefresh(){
        if currentIndex == imageInformation.count - 1 {
            currentIndex = 0
        }
        else {
            currentIndex += 1
        }
        //Update Label
        UIView.transition(with: self.musicNameLabel, duration: 2.0, options: [.transitionCrossDissolve] , animations: {
            self.musicNameLabel.text = self.imageInformation[self.currentIndex].name

        }, completion: nil)
        //Update foreground Album
        UIView.transition(with: self.foregroundAlbumArt, duration: 2.0, options: [.transitionCrossDissolve] , animations: {
            self.foregroundAlbumArt.image = self.imageInformation[self.currentIndex].image
        }, completion: nil)
        //Update background Album

        UIView.transition(with: self.backgroundAlbumArt, duration: 2.0, options: [.transitionCrossDissolve] , animations: {
            self.backgroundAlbumArt.image = self.imageInformation[self.currentIndex].image
        }, completion: nil)

    }

}

Answer 1

尝试

    //Update Label
    UIView.transition(with: self.musicNameLabel, duration: 2.0, options: [.transitionCrossDissolve] , animations: { [weak self] in
        guard let `self` = self else { return }
        self.musicNameLabel.text = self.imageInformation[self.currentIndex].name

    }, completion: nil)

    //Update foreground Album
    UIView.transition(with: self.foregroundAlbumArt, duration: 2.0, options: [.transitionCrossDissolve] , animations: { [weak self] in
        guard let `self` = self else { return }
        self.foregroundAlbumArt.image = self.imageInformation[self.currentIndex].image
    }, completion: nil)
    //Update background Album

    UIView.transition(with: self.backgroundAlbumArt, duration: 2.0, options: [.transitionCrossDissolve] , animations: { [weak self] in
        guard let `self` = self else { return }
        self.backgroundAlbumArt.image = self.imageInformation[self.currentIndex].image
    }, completion: nil)

Xcode 9：获取有关内存泄漏的更多信息

1 个答案: