mat*_*att 65 macos error-handling cocoa cocoa-touch ios
我对这款iPhone SDK及其文档感到有点不舒服......
我打电话给AudioConverterNew
在返回下的文档中:它说"返回状态代码"......真的......
到目前为止,通过玩这些参数我只能得到两个不同的错误,这两个错误都没有列在音频转换器参考的底部.
它们是'mrep'和'？tmf'(将OSStatus转换为char数组)但具体代码并不是真正重要的.
据我所知,随机错误代码是在随机文件中定义的,因此您不能只搜索一个文件,我找不到只是让您搜索错误代码以获取更多信息的帮助文档,并且我可以告诉你,在OS X中,你可以使用GetMacOSStatusErrorString()将错误转换为有用的东西,但没有iPhone等价？
任何帮助将不胜感激.
编辑:
好的,所以投射它们反过来(我检查'mrep',但不是那里的任何一种方式),fmt？在音频转换器api的列表中,如果有点模糊,但是很公平,仍然'perm'不存在(尽管它可能与模拟器不支持aac解码有关)和我的一般问题仍然存在.
tom*_*omk 88
OSStatus是带符号的整数值.您无法将其转换或"转换"为字符串.您可以将它转换为NSError,如下所示:
NSError *error = [NSError errorWithDomain:NSOSStatusErrorDomain code:osStatus userInfo:nil];
ken*_*ytm 30
不,不完全.
一些OSStatus是四字符代码,因此您可以使用(从iPhone SDK的示例代码" CAXException.h"中提取)
static char *FormatError(char *str, OSStatus error)
{
// see if it appears to be a 4-char-code
*(UInt32 *)(str + 1) = CFSwapInt32HostToBig(error);
if (isprint(str[1]) && isprint(str[2]) && isprint(str[3]) && isprint(str[4])) {
str[0] = str[5] = '\'';
str[6] = '\0';
} else {
// no, format it as an integer
sprintf(str, "%d", (int)error);
}
return str;
}
(参见iOS/C:将"整数"转换为四个字符串,以获得将fourcc转换为字符串的更多方法,包括Swift)
NSError的NSOSStatusErrorDomain能够解码一些操作系统错误.请参阅@ tomk的回答.
如果您不需要为用户解码程序中的数字,您可以使用该macerror脚本手动找出其含义,如@ lros的答案中所述.支持的OSStatus列表可以从其源代码中找到/System/Library/Perl/Extras/5.18/Mac/Errors.pm.
还有一个在线服务http://osstatus.com/收集所有公共框架的错误.它们仍然不完整,例如-12792缺少评论中提到的映射.可能它是来自私有框架的代码.
小智 13
我最近遇到了另一种方法:macerror命令.将OSStatus值打印为带符号整数.然后在终端窗口(在Mac上,而不是你的iDevice!)类型,例如macerror -50.它将以简短的描述作出回应.显然,这只对您在开发过程中有所帮助.
Ech*_* Lu 11
这是我写的代码,希望它能为你节省一些打字...呃,不知道怎么让它显示正确.
- (NSString *)OSStatusToStr:(OSStatus)st
{
switch (st) {
case kAudioFileUnspecifiedError:
return @"kAudioFileUnspecifiedError";
case kAudioFileUnsupportedFileTypeError:
return @"kAudioFileUnsupportedFileTypeError";
case kAudioFileUnsupportedDataFormatError:
return @"kAudioFileUnsupportedDataFormatError";
case kAudioFileUnsupportedPropertyError:
return @"kAudioFileUnsupportedPropertyError";
case kAudioFileBadPropertySizeError:
return @"kAudioFileBadPropertySizeError";
case kAudioFilePermissionsError:
return @"kAudioFilePermissionsError";
case kAudioFileNotOptimizedError:
return @"kAudioFileNotOptimizedError";
case kAudioFileInvalidChunkError:
return @"kAudioFileInvalidChunkError";
case kAudioFileDoesNotAllow64BitDataSizeError:
return @"kAudioFileDoesNotAllow64BitDataSizeError";
case kAudioFileInvalidPacketOffsetError:
return @"kAudioFileInvalidPacketOffsetError";
case kAudioFileInvalidFileError:
return @"kAudioFileInvalidFileError";
case kAudioFileOperationNotSupportedError:
return @"kAudioFileOperationNotSupportedError";
case kAudioFileNotOpenError:
return @"kAudioFileNotOpenError";
case kAudioFileEndOfFileError:
return @"kAudioFileEndOfFileError";
case kAudioFilePositionError:
return @"kAudioFilePositionError";
case kAudioFileFileNotFoundError:
return @"kAudioFileFileNotFoundError";
default:
return @"unknown error";
}
}
iOS*_*com 10
这适用于macOS和iOS 11.3及以上版本.
我知道这是一个旧帖子,但我正在阅读与钥匙链相关的部分中的苹果文档.他们提到了一种用于将OSStatus错误转换为可读内容的方法.
SecCopyErrorMessageString
返回一个解释安全结果代码含义的字符串.
SecCopyErrorMessageString(OSStatus status,void*reserved);
用途:
NSString* ErrMsg = (__bridge_transfer NSString *) SecCopyErrorMessageString(theOSStatusError, NULL);
我的钥匙串OSStatus错误对我有用.对你起作用吗？您需要将Security.Framework添加到项目中才能使用此方法.
对于 iOS 11.3+，我在OSStatus…
extension OSStatus {
var error: NSError? {
guard self != errSecSuccess else { return nil }
let message = SecCopyErrorMessageString(self, nil) as String? ?? "Unknown error"
return NSError(domain: NSOSStatusErrorDomain, code: Int(self), userInfo: [
NSLocalizedDescriptionKey: message])
}
}
你可以称之为……
let status = SecItemAdd(attributes as CFDictionary, nil)
if let error = status.error {
throw error
}
// etc
写完这篇后，我注意到这与@RomanMykitchak 之前的回答非常接近（所以请给他点赞） - 但我会把它留在这里，因为扩展可能对某人有用。
我结合了一些答案。实际上，我正在寻找类似“ throw errorForStatusCode（status）”的东西。但最终实现了：
guard status == errSecSuccess else {
throw NSError(domain: NSOSStatusErrorDomain, code: Int(status), userInfo: [NSLocalizedDescriptionKey: SecCopyErrorMessageString(status, nil) ?? "Undefined error"])
}
可从iOS 11.3 https://developer.apple.com/documentation/security/1542001-security_framework_result_codes获得SecCopyErrorMessageString
我创建了一个 OSStatus 扩展，您可能会发现它很有用。它会记录音频相关错误的完整错误消息，否则可能会记录四字符代码，否则会记录您可以在https://www.osstatus.com 中查找的 OSStatus 编号
它进一步添加了有用的信息，如文件、函数和发生错误的行。
这是代码：
let isDebug = true
//**************************
// OSStatus extensions for logging
//**************************
extension OSStatus {
//**************************
func asString() -> String? {
let n = UInt32(bitPattern: self.littleEndian)
guard let n1 = UnicodeScalar((n >> 24) & 255), n1.isASCII else { return nil }
guard let n2 = UnicodeScalar((n >> 16) & 255), n2.isASCII else { return nil }
guard let n3 = UnicodeScalar((n >> 8) & 255), n3.isASCII else { return nil }
guard let n4 = UnicodeScalar( n & 255), n4.isASCII else { return nil }
return String(n1) + String(n2) + String(n3) + String(n4)
} // asString
//**************************
func detailedErrorMessage() -> String? {
switch(self) {
//***** AUGraph errors
case kAUGraphErr_NodeNotFound: return "AUGraph Node Not Found"
case kAUGraphErr_InvalidConnection: return "AUGraph Invalid Connection"
case kAUGraphErr_OutputNodeErr: return "AUGraph Output Node Error"
case kAUGraphErr_CannotDoInCurrentContext: return "AUGraph Cannot Do In Current Context"
case kAUGraphErr_InvalidAudioUnit: return "AUGraph Invalid Audio Unit"
//***** MIDI errors
case kMIDIInvalidClient: return "MIDI Invalid Client"
case kMIDIInvalidPort: return "MIDI Invalid Port"
case kMIDIWrongEndpointType: return "MIDI Wrong Endpoint Type"
case kMIDINoConnection: return "MIDI No Connection"
case kMIDIUnknownEndpoint: return "MIDI Unknown Endpoint"
case kMIDIUnknownProperty: return "MIDI Unknown Property"
case kMIDIWrongPropertyType: return "MIDI Wrong Property Type"
case kMIDINoCurrentSetup: return "MIDI No Current Setup"
case kMIDIMessageSendErr: return "MIDI Message Send Error"
case kMIDIServerStartErr: return "MIDI Server Start Error"
case kMIDISetupFormatErr: return "MIDI Setup Format Error"
case kMIDIWrongThread: return "MIDI Wrong Thread"
case kMIDIObjectNotFound: return "MIDI Object Not Found"
case kMIDIIDNotUnique: return "MIDI ID Not Unique"
case kMIDINotPermitted: return "MIDI Not Permitted"
//***** AudioToolbox errors
case kAudioToolboxErr_CannotDoInCurrentContext: return "AudioToolbox Cannot Do In Current Context"
case kAudioToolboxErr_EndOfTrack: return "AudioToolbox End Of Track"
case kAudioToolboxErr_IllegalTrackDestination: return "AudioToolbox Illegal Track Destination"
case kAudioToolboxErr_InvalidEventType: return "AudioToolbox Invalid Event Type"
case kAudioToolboxErr_InvalidPlayerState: return "AudioToolbox Invalid Player State"
case kAudioToolboxErr_InvalidSequenceType: return "AudioToolbox Invalid Sequence Type"
case kAudioToolboxErr_NoSequence: return "AudioToolbox No Sequence"
case kAudioToolboxErr_StartOfTrack: return "AudioToolbox Start Of Track"
case kAudioToolboxErr_TrackIndexError: return "AudioToolbox Track Index Error"
case kAudioToolboxErr_TrackNotFound: return "AudioToolbox Track Not Found"
case kAudioToolboxError_NoTrackDestination: return "AudioToolbox No Track Destination"
//***** AudioUnit errors
case kAudioUnitErr_CannotDoInCurrentContext: return "AudioUnit Cannot Do In Current Context"
case kAudioUnitErr_FailedInitialization: return "AudioUnit Failed Initialization"
case kAudioUnitErr_FileNotSpecified: return "AudioUnit File Not Specified"
case kAudioUnitErr_FormatNotSupported: return "AudioUnit Format Not Supported"
case kAudioUnitErr_IllegalInstrument: return "AudioUnit Illegal Instrument"
case kAudioUnitErr_Initialized: return "AudioUnit Initialized"
case kAudioUnitErr_InvalidElement: return "AudioUnit Invalid Element"
case kAudioUnitErr_InvalidFile: return "AudioUnit Invalid File"
case kAudioUnitErr_InvalidOfflineRender: return "AudioUnit Invalid Offline Render"
case kAudioUnitErr_InvalidParameter: return "AudioUnit Invalid Parameter"
case kAudioUnitErr_InvalidProperty: return "AudioUnit Invalid Property"
case kAudioUnitErr_InvalidPropertyValue: return "AudioUnit Invalid Property Value"
case kAudioUnitErr_InvalidScope: return "AudioUnit InvalidScope"
case kAudioUnitErr_InstrumentTypeNotFound: return "AudioUnit Instrument Type Not Found"
case kAudioUnitErr_NoConnection: return "AudioUnit No Connection"
case kAudioUnitErr_PropertyNotInUse: return "AudioUnit Property Not In Use"
case kAudioUnitErr_PropertyNotWritable: return "AudioUnit Property Not Writable"
case kAudioUnitErr_TooManyFramesToProcess: return "AudioUnit Too Many Frames To Process"
case kAudioUnitErr_Unauthorized: return "AudioUnit Unauthorized"
case kAudioUnitErr_Uninitialized: return "AudioUnit Uninitialized"
case kAudioUnitErr_UnknownFileType: return "AudioUnit Unknown File Type"
case kAudioUnitErr_RenderTimeout: return "AudioUnit Rendre Timeout"
//***** AudioComponent errors
case kAudioComponentErr_DuplicateDescription: return "AudioComponent Duplicate Description"
case kAudioComponentErr_InitializationTimedOut: return "AudioComponent Initialization Timed Out"
case kAudioComponentErr_InstanceInvalidated: return "AudioComponent Instance Invalidated"
case kAudioComponentErr_InvalidFormat: return "AudioComponent Invalid Format"
case kAudioComponentErr_NotPermitted: return "AudioComponent Not Permitted "
case kAudioComponentErr_TooManyInstances: return "AudioComponent Too Many Instances"
case kAudioComponentErr_UnsupportedType: return "AudioComponent Unsupported Type"
//***** Audio errors
case kAudio_BadFilePathError: return "Audio Bad File Path Error"
case kAudio_FileNotFoundError: return "Audio File Not Found Error"
case kAudio_FilePermissionError: return "Audio File Permission Error"
case kAudio_MemFullError: return "Audio Mem Full Error"
case kAudio_ParamError: return "Audio Param Error"
case kAudio_TooManyFilesOpenError: return "Audio Too Many Files Open Error"
case kAudio_UnimplementedError: return "Audio Unimplemented Error"
default: return nil
} // switch(self)
} // detailedErrorMessage
//**************************
func debugLog(filePath: String = #file, line: Int = #line, funcName: String = #function) {
guard isDebug, self != noErr else { return }
let fileComponents = filePath.components(separatedBy: "/")
let fileName = fileComponents.last ?? "???"
var logString = "OSStatus = \(self) in \(fileName) - \(funcName), line \(line)"
if let errorMessage = self.detailedErrorMessage() { logString = errorMessage + ", " + logString }
else if let errorCode = self.asString() { logString = errorCode + ", " + logString }
NSLog(logString)
} // debugLog
} // extension OSStatus
用法是：
//***** Create audioGraph
NewAUGraph(&audioGraph).debugLog()
//***** Testing .debugLog() OSStatus extension
kAUGraphErr_InvalidAudioUnit.debugLog()
OSStatus(560226676).debugLog()
OSStatus(-125).debugLog()
三个测试的结果日志：
2018-11-12 19:41:48.427606+0100 HexaSynth[5875:102611] AUGraph 无效音频单元，SoftSynthesizer.swift 中的 OSStatus = -10864 - init(soundFontFileName:)，第 40 行
2018-11-12 19:41:48.428403+0100 HexaSynth[5875:102611] !dat, OSStatus = 560226676 in SoftSynthesizer.swift - init(soundFontFileName:), line 41
2018-11-12 19:41:48.428638+0100 HexaSynth[5875:102611] OSStatus = -125 in SoftSynthesizer.swift - init(soundFontFileName:)，第 42 行
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