Code Obfuscation and Anti-Tampering

While iOS provides strong platform security, additional measures can protect against reverse engineering and tampering.
Swift Code Protection Techniques:
// Anti-debugging implementation
class SecurityManager {
    
    // Check for debugger attachment
    func isDebuggerAttached() -> Bool {
        var info = kinfo_proc()
        var mib: [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()]
        var size = MemoryLayout<kinfo_proc>.stride
        
        let result = sysctl(&mib, UInt32(mib.count), &info, &size, nil, 0)
        
        return result == 0 && (info.kp_proc.p_flag & P_TRACED) != 0
    }
    
    // Jailbreak detection
    func isJailbroken() -> Bool {
        // Check for common jailbreak files
        let jailbreakPaths = [
            "/Applications/Cydia.app",
            "/Library/MobileSubstrate/MobileSubstrate.dylib",
            "/bin/bash",
            "/usr/sbin/sshd",
            "/etc/apt",
            "/private/var/lib/apt/"
        ]
        
        for path in jailbreakPaths {
            if FileManager.default.fileExists(atPath: path) {
                return true
            }
        }
        
        // Check if app can write outside sandbox
        let testString = "Jailbreak test"
        do {
            try testString.write(toFile: "/private/test.txt", 
                               atomically: true, 
                               encoding: .utf8)
            // If write succeeds, device is jailbroken
            try FileManager.default.removeItem(atPath: "/private/test.txt")
            return true
        } catch {
            // Write failed, device is not jailbroken
        }
        
        // Check for suspicious URL schemes
        if UIApplication.shared.canOpenURL(URL(string: "cydia://")!) {
            return true
        }
        
        return false
    }
    
    // Runtime protection
    func enableRuntimeProtection() {
        // Disable debugging
        #if !DEBUG
        if isDebuggerAttached() {
            exit(0)
        }
        #endif
        
        // Check for jailbreak
        if isJailbroken() {
            // Handle jailbroken device appropriately
            // Could limit functionality or warn user
        }
    }
}