我正在try 从用户的照片库中获取一些照片(PHAsset张)，并将它们转换为UIImage张.
以下是从库中获取assets资源 的代码:
func fetchPhotos() {
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "(mediaSubtype & %d) != 0", PHAssetMediaSubtype.photoScreenshot.rawValue)
//Fetching Screen Shots
fetchedResult = PHAsset.fetchAssets(with: .image, options: fetchOptions)
let f: FetchResult = FetchResult(fetchedResult!)
var fetchCount = 0
for i in f {
fetchCount += 1
print("Fetch count \(fetchCount)")
let img = i.getAssetThumbnail()
testImages.append(img)
}
}
以下是满分为PHAsset分的代码:
extension PHAsset {
func getAssetThumbnail() -> UIImage {
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var thumbnail = UIImage()
option.isSynchronous = true
manager.requestImage(for: self,
targetSize: CGSize(width: self.pixelWidth, height: self.pixelHeight),
contentMode: .aspectFit,
options: option,
resultHandler: {(result, info) -> Void in
thumbnail = result!
})
return thumbnail
}
}
我当前在try 运行代码时得到以下崩溃输出:
Details
The app “AppClassificationDemo” on Nick’s iPhone quit unexpectedly.
Domain: IDEDebugSessionErrorDomain
Code: 11
Failure Reason: Message from debugger: Terminated due to memory issue
User Info: {
DVTErrorCreationDateKey = "2022-11-14 22:19:19 +0000";
IDERunOperationFailingWorker = DBGLLDBLauncher;
}
--
Analytics Event: com.apple.dt.IDERunOperationWorkerFinished : {
"device_model" = "iPhone14,2";
"device_osBuild" = "16.1.1 (20B101)";
"device_platform" = "com.apple.platform.iphoneos";
"launchSession_schemeCommand" = Run;
"launchSession_state" = 2;
"launchSession_targetArch" = arm64;
"operation_duration_ms" = 6369;
"operation_errorCode" = 11;
"operation_errorDomain" = IDEDebugSessionErrorDomain;
"operation_errorWorker" = DBGLLDBLauncher;
"operation_name" = IDEiPhoneRunOperationWorkerGroup;
"param_consoleMode" = 0;
"param_debugger_attachToExtensions" = 0;
"param_debugger_attachToXPC" = 1;
"param_debugger_type" = 5;
"param_destination_isProxy" = 0;
"param_destination_platform" = "com.apple.platform.iphoneos";
"param_diag_MainThreadChecker_stopOnIssue" = 0;
"param_diag_MallocStackLogging_enableDuringAttach" = 0;
"param_diag_MallocStackLogging_enableForXPC" = 1;
"param_diag_allowLocationSimulation" = 1;
"param_diag_checker_tpc_enable" = 1;
"param_diag_gpu_frameCapture_enable" = 0;
"param_diag_gpu_shaderValidation_enable" = 0;
"param_diag_gpu_validation_enable" = 0;
"param_diag_memoryGraphOnResourceException" = 0;
"param_diag_queueDebugging_enable" = 1;
"param_diag_runtimeProfile_generate" = 0;
"param_diag_sanitizer_asan_enable" = 0;
"param_diag_sanitizer_tsan_enable" = 0;
"param_diag_sanitizer_tsan_stopOnIssue" = 0;
"param_diag_sanitizer_ubsan_stopOnIssue" = 0;
"param_diag_showNonLocalizedStrings" = 0;
"param_diag_viewDebugging_enabled" = 1;
"param_diag_viewDebugging_insertDylibOnLaunch" = 1;
"param_install_style" = 0;
"param_launcher_UID" = 2;
"param_launcher_allowDeviceSensorReplayData" = 0;
"param_launcher_kind" = 0;
"param_launcher_style" = 0;
"param_launcher_substyle" = 0;
"param_runnable_appExtensionHostRunMode" = 0;
"param_runnable_productType" = "com.apple.product-type.application";
"param_runnable_type" = 2;
"param_testing_launchedForTesting" = 0;
"param_testing_suppressSimulatorApp" = 0;
"param_testing_usingCLI" = 0;
"sdk_canonicalName" = "iphoneos16.1";
"sdk_osVersion" = "16.1";
"sdk_variant" = iphoneos;
}
--
System Information
macOS Version 13.0.1 (Build 22A400)
Xcode 14.1 (21534.1) (Build 14B47b)
Timestamp: 2022-11-14T14:19:19-08:00
我相当确定它是要生成的图像缩略图的大小；当我将width和height都设置为width时，处理工作就像预期的那样.
当将其更改为self.pixelWidth和self.pixelHeight时，应用程序会崩溃.