Hitting the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 error in your Cocoa application can stop you dead in your tracks. This frustrating error tells you that your app can’t find a specific command it needs to execute. The Slovak phrase “zadaná skratka sa nenašla” translates to “specified shortcut not found,” which perfectly captures what’s happening under the hood.
I’ll walk you through exactly what this error means, why it’s happening, and how to fix it, with practical code examples that work. No fluff, just solutions that’ll get your app running smoothly again.
Decoding the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 Message
Let’s break down this cryptic-looking error:
Error Domain: NSCocoaErrorDomain
Error Message: zadaná skratka sa nenašla (Command Not Found)
Error Code: 4
When you see error code 4 in the NSCocoaErrorDomain, you’re facing an issue where your application tried to call a method or use a feature that isn’t available in the current context. This commonly appears in your console output like this:
Error Domain=NSCocoaErrorDomain Code=4 “zadaná skratka sa nenašla”
UserInfo={NSLocalizedDescription=zadaná skratka sa nenašla}
The NSCocoaErrorDomain error code 4 indicates explicitly a file not found situation—your app is looking for something that doesn’t exist where it expects to see it.
Common Causes of the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 Error
1. Missing or Relocated Files
Your app might be trying to access a file that’s been moved, renamed, or deleted entirely.
Problematic Code:
let filePath = “Documents/config.json”
do {
let data = try Data(contentsOf: URL(fileURLWithPath: filePath))
// Process data
} catch {
print(error)
}
Fixed Code:
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let filePath = documentsDirectory.appendingPathComponent(“config.json”)
// Check if file exists before attempting to access
if FileManager.default.fileExists(atPath: filePath.path) {
do {
let data = try Data(contentsOf: filePath)
// Process data
} catch {
print(“Error reading file: \(error)”)
}
} else {
print(“Config file doesn’t exist at: \(filePath.path)”)
// Handle missing file scenario
}
2. Insufficient Permissions
Your app might lack the necessary permissions to access a file or directory.
Problematic Code:
let restrictedFilePath = “/Library/Application Support/AppName/settings.plist”
let dict = NSDictionary(contentsOfFile: restrictedFilePath)
Fixed Code:
// Use proper user-accessible directory
let libraryDirectory = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first!
let appDirectory = libraryDirectory.appendingPathComponent(“AppName”)
// Create directory if it doesn’t exist
try? FileManager.default.createDirectory(at: appDirectory, withIntermediateDirectories: true)
let settingsPath = appDirectory.appendingPathComponent(“settings.plist”)
let dict = NSDictionary(contentsOfFile: settingsPath.path) ?? NSDictionary()
// Now save back if needed
dict.write(to: settingsPath, atomically: true)
3. File Corruption Issues
System crashes or improper app termination can corrupt files.
Problematic Code:
// Assuming this file might be corrupted
let data = NSData(contentsOfFile: “corrupted.data”)
let object = NSKeyedUnarchiver.unarchiveObject(with: data as Data)
Fixed Code:
let filePath = “corrupted.data”
if let data = try? Data(contentsOf: URL(fileURLWithPath: filePath)) {
do {
// Use modern secure coding methods
let object = try NSKeyedUnarchiver.unarchivedObject(ofClass: NSObject.self, from: data)
// Use the object
} catch {
print(“Decoding failed, file may be corrupted: \(error)”)
// Create a new default object and save it to replace corrupted file
let newDefault = DefaultObject()
let newData = try? NSKeyedArchiver.archivedData(withRootObject: newDefault, requiringSecureCoding: true)
try? newData?.write(to: URL(fileURLWithPath: filePath))
}
}
4. Method or Selector Not Found
If you’re calling a method that hasn’t existed or been deprecated.
Problematic Code:
// Using a method that might not exist in all iOS versions
if ([UIDevice currentDevice] respondsToSelector:@selector(someDeprecatedMethod)]) {
[UIDevice currentDevice] someDeprecatedMethod];
}
Fixed Code:
// Always check API availability properly
if (@available(iOS 13.0, *)) {
// Use new API
[UIDevice currentDevice].someNewMethod];
} else {
// Fallback for older iOS versions
// Implement alternative functionality
}
Solutions Comparison: Fixing errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4
| Prevention Techniques | Recovery Strategies |
| Use FileManager’s fileExists(atPath:) before accessing files | Implement fallback functionality when files aren’t found |
| Store files in standard system directories (Documents, Library, etc.) | Create missing directories and default files automatically |
| Implement robust error handling with specific error types | Log detailed error information for troubleshooting |
| Use proper sandboxed file access on iOS and macOS | Implement data recovery mechanisms for corrupted files |
| Check API availability with @available annotations | Add version-specific code paths with backwards compatibility |
Diagnosing the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 Error
Follow this systematic approach to pinpoint exactly where and why this error occurs:
- Enable detailed logging for file operations:
func attemptFileAccess(at path: String) {
print(“⬇️ Attempting to access file at: \(path)”)
// Check file existence
let fileExists = FileManager.default.fileExists(atPath: path)
print(“📋 File exists: \(fileExists)”)
if fileExists {
// Check permissions
let attributes = try? FileManager.default.attributesOfItem(atPath: path)
print(“🔒 File attributes: \(attributes ?? [:])”)
// Try reading
do {
let data = try Data(contentsOf: URL(fileURLWithPath: path))
print(“✅ Successfully read \(data.count) bytes”)
} catch {
print(“❌ Failed to read file: \(error)”)
if let nsError = error as NSError {
print(“📊 Error domain: \(nsError.domain)”)
print(“🔢 Error code: \(nsError.code)”)
print(“ℹ️ Error description: \(nsError.localizedDescription)”)
print(“🔍 Error user info: \(nsError.userInfo)”)
}
}
}
}
- Create a test harness to verify each possible cause:
func diagnoseFileIssues() {
// Test case 1: File doesn’t exist
attemptFileAccess(at: “/non-existent-path.txt”)
// Test case 2: Permissions issue
attemptFileAccess(at: “/Library/Preferences/SystemConfiguration/preferences.plist”)
// Test case 3: File exists and is accessible
let tempFile = NSTemporaryDirectory().appending(“test-file.txt”)
try? “Test content”.write(toFile: tempFile, atomically: true, encoding: .utf8)
attemptFileAccess(at: tempFile)
// Test case 4: File with non-ASCII characters
let specialCharFile = NSTemporaryDirectory().appending(“tesť-fíle.txt”)
try? “Test content”.write(toFile: specialCharFile, atomically: true, encoding: .utf8)
attemptFileAccess(at: specialCharFile)
}
A real error log might look like:
⬇️ Attempting to access file at: /Users/developer/Documents/config.json
📋 File exists: false
❌ Failed to read file: Error Domain=NSCocoaErrorDomain Code=4 “zadaná skratka sa nenašla” UserInfo={NSLocalizedDescription=zadaná skratka sa nenašla}
📊 Error domain: NSCocoaErrorDomain
🔢 Error code: 4
ℹ️ Error description: zadaná skratka sa nenašla
🔍 Error user info: {NSLocalizedDescription=zadaná skratka sa nenašla}
Complete Implementation to Prevent and Handle the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 Error
Here’s a robust, production-ready solution to handle file operations safely:
import Foundation
// MARK: – FileManager Extension
extension FileManager {
enum FileError: Error {
case fileNotFound
case permissionDenied
case corruptedData
case unknownError(Error)
var localizedDescription: String {
switch self {
case .fileNotFound: return “The specified file does not exist”
case .permissionDenied: return “Permission denied when accessing the file”
case .corruptedData: return “The file data appears to be corrupted”
case .unknownError(let error): return “Unknown error: \(error.localizedDescription)”
}
}
}
/// Safely reads data from a file with comprehensive error handling
/// – Parameter filePath: Path to the file
/// – Returns: Data from the file
/// – Throws: FileError with specific error information
func safeReadData(fromFile filePath: String) throws -> Data {
// Ensure file exists
guard fileExists(atPath: filePath) else {
print(“File not found at path: \(filePath)”)
throw FileError.fileNotFound
}
// Check if we can access the file
guard isReadableFile(atPath: filePath) else {
print(“File is not readable: \(filePath)”)
throw FileError.permissionDenied
}
do {
// Try to read the file
return try Data(contentsOf: URL(fileURLWithPath: filePath))
} catch {
// Handle specific NSCocoaError cases
if let nsError = error as NSError,
nsError.domain == NSCocoaErrorDomain {
switch nsError.code {
case 4: // File not found
print(“NSCocoaErrorDomain Code 4: File not found – \(filePath)”)
throw FileError.fileNotFound
case 257: // Couldn’t read because of error in file
print(“NSCocoaErrorDomain Code 257: Corrupted data in file – \(filePath)”)
throw FileError.corruptedData
case 260: // No permission
print(“NSCocoaErrorDomain Code 260: Permission denied – \(filePath)”)
throw FileError.permissionDenied
default:
print(“NSCocoaErrorDomain unknown code \(nsError.code): \(nsError.localizedDescription)”)
throw FileError.unknownError(error)
}
}
print(“Unknown error reading file: \(error.localizedDescription)”)
throw FileError.unknownError(error)
}
}
/// Creates a file with default content if it doesn’t exist
/// – Parameters:
/// – filePath: Path where file should be created
/// – defaultContent: Default content to write if file doesn’t exist
/// – Returns: true if file exists or was created successfully
@discardableResult
func ensureFileExists(at filePath: String, defaultContent: Data? = nil) -> Bool {
// Check if file already exists
if fileExists(atPath: filePath) {
return true
}
// Make sure directory exists for this file
let directoryPath = (filePath as NSString).deletingLastPathComponent
do {
try createDirectory(atPath: directoryPath,
withIntermediateDirectories: true,
attributes: nil)
// Create empty file or with default content
if let content = defaultContent {
return createFile(atPath: filePath, contents: content, attributes: nil)
} else {
return createFile(atPath: filePath, contents: nil, attributes: nil)
}
} catch {
print(“Failed to create directory for file: \(error.localizedDescription)”)
return false
}
}
}
// MARK: – Usage Example
class ConfigManager {
static let shared = ConfigManager()
private let fileManager = FileManager.default
private let configFilename = “config.json”
var configFilePath: String {
let documentsDirectory = fileManager.urls(for: .documentDirectory,
in: .userDomainMask).first!
return documentsDirectory.appendingPathComponent(configFilename).path
}
init() {
// Create default config if it doesn’t exist
let defaultConfig = [“version”: “1.0”, “firstRun”: true] as [String: Any]
if let defaultData = try? JSONSerialization.data(withJSONObject: defaultConfig) {
fileManager.ensureFileExists(at: configFilePath, defaultContent: defaultData)
}
}
func loadConfig() -> [String: Any]? {
do {
let data = try fileManager.safeReadData(fromFile: configFilePath)
return try JSONSerialization.jsonObject(with: data) as? [String: Any]
} catch let error as FileManager.FileError {
handleFileError(error)
return nil
} catch {
print(“Failed to parse config: \(error.localizedDescription)”)
return nil
}
}
private func handleFileError(_ error: FileManager.FileError) {
switch error {
case .fileNotFound:
print(“Config file not found, creating default…”)
// Create default config
let defaultConfig = [“version”: “1.0”, “firstRun”: true] as [String: Any]
saveConfig(defaultConfig)
case .corruptedData:
print(“Config file corrupted, resetting to default…”)
// Backup corrupted file and create new default
backupCorruptedFile()
let defaultConfig = [“version”: “1.0”, “firstRun”: true] as [String: Any]
saveConfig(defaultConfig)
case .permissionDenied:
print(“Permission denied when accessing config. Check app permissions.”)
case .unknownError(let underlyingError):
print(“Unknown error with config file: \(underlyingError.localizedDescription)”)
}
}
private func backupCorruptedFile() {
let backupPath = configFilePath + “.corrupted”
try? fileManager.removeItem(atPath: backupPath)
try? fileManager.moveItem(atPath: configFilePath, toPath: backupPath)
}
func saveConfig(_ config: [String: Any]) {
if let data = try? JSONSerialization.data(withJSONObject: config) {
try? data.write(to: URL(fileURLWithPath: configFilePath))
}
}
// MARK: – Test Cases
func runDiagnostics() {
print(“Running file system diagnostics…”)
// Test reading config
if let config = loadConfig() {
print(“✅ Successfully loaded config: \(config)”)
} else {
print(“❌ Failed to load config”)
}
// Test with non-existent file
let nonExistentPath = configFilePath + “.doesnotexist”
do {
let _ = try fileManager.safeReadData(fromFile: nonExistentPath)
} catch let error as FileManager.FileError {
print(“✅ Correctly handled non-existent file: \(error.localizedDescription)”)
} catch {
print(“❓ Unexpected error type: \(error)”)
}
print(“Diagnostics complete”)
}
}
// Example usage:
// let configManager = ConfigManager.shared
// configManager.runDiagnostics()
Final Thoughts on the errordomain=nscocoaerrordomain&errormessage=zadaná skratka sa nenašla.&errorcode=4 Error
The NSCocoaErrorDomain error code 4 ultimately boils down to proper file path handling and checking. Always verify a file exists before attempting to access it, use appropriate sandboxed directories, and implement thorough error handling specific to file operations. The most critical fix is using the FileManager’s fileExists(atPath:) method before any file operation.
