Question

在我的项目中，我向用户显示了库图像和视频，但是在某些设备中，我遇到了ArrayBuffer.getElementSlowPath之类的崩溃。谁能指导我如何重现此问题？我从Crashlytics那里得到了这个问题。

这是我从节拍中获取视频的代码。

 func getVideo(withCompletionHandler completion:@escaping CompletionHandler)  {
        let fetchOptions = PHFetchOptions()
        let requestOptions = PHVideoRequestOptions()
        requestOptions.isNetworkAccessAllowed = false
        fetchOptions.sortDescriptors = [NSSortDescriptor(key:"creationDate", ascending: false)]
        let fetchResult: PHFetchResult = PHAsset.fetchAssets(with: PHAssetMediaType.video, options: fetchOptions)

        fetchResult.enumerateObjects ({ (assest, index, isCompleted) in
            if assest.sourceType != PHAssetSourceType.typeiTunesSynced{
                PHImageManager.default().requestAVAsset(forVideo: assest , options: requestOptions, resultHandler: { (asset : AVAsset?, video : AVAudioMix?, dic : [AnyHashable : Any]?) in
                    if let _ = asset as? AVURLAsset
                    {
                        let objAssest = GallaryAssets()
                        objAssest.objAssetsType = assetsType.videoType
                        objAssest.createdDate = (assest ).creationDate
                        objAssest.assetsDuration = (assest ).duration
                        objAssest.assetsURL = (asset as! AVURLAsset).url
                        objAssest.localizationStr = assest.localIdentifier
                        objAssest.locationInfo = LocationInfo()
                        if let location = (assest).location
                        {
                            objAssest.locationInfo.Latitude = "\(location.coordinate.latitude)"
                            objAssest.locationInfo.Longitude = "\(location.coordinate.longitude)"
                        }

                        self.media.add(objAssest)
                    }
                    completion(self.media)
                   }                    
                })
            }
        })
    }
}

Answer 1

您要删除completion上的控制器吗？ enumerateObject函数是同步执行的，如果在完成函数停止执行之前调用完成函数，并且fetchResult对象在函数结束执行之前被释放，则可能导致问题。

尝试在枚举结束后调用完成块，如果只需要一个结果，请将isCompleted指针更改为true，这将停止执行枚举：

func getVideo(withCompletionHandler completion:@escaping CompletionHandler)  {
        let fetchOptions = PHFetchOptions()
        let requestOptions = PHVideoRequestOptions()
        fetchOptions.sortDescriptors = [NSSortDescriptor(key:"creationDate", ascending: false)]
        let fetchResult: PHFetchResult = PHAsset.fetchAssets(with: PHAssetMediaType.video, options: fetchOptions)

        fetchResult.enumerateObjects ({ (assest, index, isCompleted) in
            if assest.sourceType != PHAssetSourceType.typeiTunesSynced{
                PHImageManager.default().requestAVAsset(forVideo: assest , options: requestOptions, resultHandler: { (asset : AVAsset?, video : AVAudioMix?, dic : [AnyHashable : Any]?) in
                    if let _ = asset as? AVURLAsset
                    {
                        let objAssest = GallaryAssets()
                        objAssest.objAssetsType = assetsType.videoType
                        objAssest.createdDate = (assest ).creationDate
                        objAssest.assetsDuration = (assest ).duration
                        objAssest.assetsURL = (asset as! AVURLAsset).url
                        objAssest.localizationStr = assest.localIdentifier
                        objAssest.locationInfo = LocationInfo()
                        if let location = (assest).location
                        {
                            objAssest.locationInfo.Latitude = "\(location.coordinate.latitude)"
                            objAssest.locationInfo.Longitude = "\(location.coordinate.longitude)"
                        }

                        self.media.add(objAssest)
                        isCompleted.pointee = true
                    }                    
                })
            }
        })
        completion(self.media)        
}

Answer 2

可能是某些视频/资源来自iCloud，您需要删除 PHVideorequestoptions ，然后检查流量。希望您的崩溃能解决。

func getVideo(withCompletionHandler completion:@escaping CompletionHandler)  {
        let fetchOptions = PHFetchOptions()
        fetchOptions.sortDescriptors = [NSSortDescriptor(key:"creationDate", ascending: false)]
        let fetchResult: PHFetchResult = PHAsset.fetchAssets(with: PHAssetMediaType.video, options: fetchOptions)

        fetchResult.enumerateObjects ({ (assest, index, isCompleted) in
            if assest.sourceType != PHAssetSourceType.typeiTunesSynced{
                PHImageManager.default().requestAVAsset(forVideo: assest , options: **PHVideoRequestOptions**(), resultHandler: { (asset : AVAsset?, video : AVAudioMix?, dic : [AnyHashable : Any]?) in
                    if let _ = asset as? AVURLAsset
                    {
                        let objAssest = GallaryAssets()
                        objAssest.objAssetsType = assetsType.videoType
                        objAssest.createdDate = (assest ).creationDate
                        objAssest.assetsDuration = (assest ).duration
                        objAssest.assetsURL = (asset as! AVURLAsset).url
                        objAssest.localizationStr = assest.localIdentifier
                        objAssest.locationInfo = LocationInfo()
                        if let location = (assest).location
                        {
                            objAssest.locationInfo.Latitude = "\(location.coordinate.latitude)"
                            objAssest.locationInfo.Longitude = "\(location.coordinate.longitude)"
                        }

                        self.media.add(objAssest)
                        isCompleted.pointee = true
                    }                    
                })
            }
        })
        completion(self.media)        
}

Answer 3

我不能肯定地说这是导致崩溃的原因，但是对于在Google搜索结果中发现此问题的其他人来说：

我在Crashlytics中使用ArrayBuffer.getElementSlowPath遇到了类似的隐秘堆栈跟踪。经过大量调试后，我在本地重现了崩溃，结果发现一个类型化的Swift数组中包含一个不是预期类型的元素。发生这种情况是因为所讨论的数组实际上是从Objective-C桥接的，而Objective-C对数组的类型的要求不严格。

ArrayBuffer.getElementSlowPath是否有人遇到此错误？

3 个答案: