Swift 4 中的 UIImagePickerController 内存泄漏 Xcode 9

在我的应用程序中，当我使用UIImagePickerController，我以为是我的应用程序的问题，但是在搜索解决方案时我找到了Apple的示例，并且我还发现该示例具有相同的内存泄漏。

您可以在以下 URL 中找到该示例。

https://developer.apple.com/library/content/samplecode/PhotoPicker/Introduction/Intro.html#//apple_ref/doc/uid/DTS40010196

根据UIImagePickerController文档：

https://developer.apple.com/documentation/uikit/uiimagepickercontroller

在第 5 点中，您说您必须使用委托对象来关闭图像选择器，在 Apple 的示例中UIImagePickerDelegate正在解雇。

问题在于，当您选择图像并使用它时，内存泄漏会浪费大约 21 MB 的内存。

使用的内存没有内存泄漏

内存泄漏的已用内存

内存泄漏

这是呈现的代码UIImagePickerController:

@IBAction func showImagePickerForPhotoPicker(_ sender: UIBarButtonItem) {
    showImagePicker(sourceType: UIImagePickerControllerSourceType.photoLibrary, button: sender)
}

fileprivate func showImagePicker(sourceType: UIImagePickerControllerSourceType, button: UIBarButtonItem) {
    // If the image contains multiple frames, stop animating.
    if (imageView?.isAnimating)! {
        imageView?.stopAnimating()
    }
    if capturedImages.count > 0 {
        capturedImages.removeAll()
    }

    imagePickerController.sourceType = sourceType
    imagePickerController.modalPresentationStyle =
        (sourceType == UIImagePickerControllerSourceType.camera) ?
            UIModalPresentationStyle.fullScreen : UIModalPresentationStyle.popover

    let presentationController = imagePickerController.popoverPresentationController
    presentationController?.barButtonItem = button   // Display popover from the UIBarButtonItem as an anchor.
    presentationController?.permittedArrowDirections = UIPopoverArrowDirection.any

    if sourceType == UIImagePickerControllerSourceType.camera {
        // The user wants to use the camera interface. Set up our custom overlay view for the camera.
        imagePickerController.showsCameraControls = false

        // Apply our overlay view containing the toolar to take pictures in various ways.
        overlayView?.frame = (imagePickerController.cameraOverlayView?.frame)!
        imagePickerController.cameraOverlayView = overlayView
    }

    present(imagePickerController, animated: true, completion: {
        // Done presenting.
    })
}

这是委托中用于驳回的代码UIImagePickerController:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let image = info[UIImagePickerControllerOriginalImage]
    capturedImages.append(image as! UIImage)

    if !cameraTimer.isValid {
        // Timer is done firing so Finish up until the user stops the timer from taking photos.
        finishAndUpdate()
    } else {
        dismiss(animated: true, completion: nil)
    }
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    dismiss(animated: true, completion: {
        // Done cancel dismiss of image picker.
    })
}

fileprivate func finishAndUpdate() {
    dismiss(animated: true, completion: { [weak self] in
        guard let `self` = self else {
            return
        }

        if `self`.capturedImages.count > 0 {
            if self.capturedImages.count == 1 {
                // Camera took a single picture.
                `self`.imageView?.image = `self`.capturedImages[0]
            } else {
                // Camera took multiple pictures; use the list of images for animation.
                `self`.imageView?.animationImages = `self`.capturedImages
                `self`.imageView?.animationDuration = 5    // Show each captured photo for 5 seconds.
                `self`.imageView?.animationRepeatCount = 0   // Animate forever (show all photos).
                `self`.imageView?.startAnimating()
            }

            // To be ready to start again, clear the captured images array.
            `self`.capturedImages.removeAll()
        }
    })
}

我仍在寻找解决方案，任何帮助将不胜感激。

我遇到过同样的问题。很多其他人也是如此。追溯到 2008 年。相当疯狂。

• http://iphonedevsdk.com/forum/iphone-sdk-development/3816-uiimagepickercontroller-memory-issues.html
• UIImagePickerController 在启动后和拍照期间泄漏内存。拍摄超过 100 张照片后导致应用程序崩溃
• UIImagePickerController 内存泄漏

不幸的是，我能找到的最好答案是使用单例，这很糟糕。 [IE。有意保留 UIImagePickerController 的实例，这样您每次想要选择图像时都只需访问该实例。] 这是其他人的建议。

此外，我只是花了一个小时用使用单例的代码编写这个答案，而且我无法避免内存泄漏[尽管我认为我有一秒钟]。也许我只是做得不正确 - 请随意尝试。但我不会发布我的功能失调的代码作为答案。

最好的答案[这就是我解决问题的方法]是使用第三方 Pod/库。我用过ImagePicker，它快、快、免费、漂亮，而且没有内存泄漏！ [麻省理工学院许可证]

在这里查看：https://github.com/hyperoslo/ImagePicker