피로에 살고 피로에 죽자

출처: http://bitxflow.synology.me/wordpress/?p=311%20

swift: https://indra17.tistory.com/entry/ios-%ED%83%88%EC%98%A5%ED%8F%B0-%EC%B2%B4%ED%81%ACswift

+(BOOL)isJailbroken{
#if !(TARGET_IPHONE_SIMULATOR)
    if ([[NSFileManager defaultManager] fileExistsAtPath:@”/Applications/Cydia.app”]){
        return YES;
    }else if([[NSFileManager defaultManager] fileExistsAtPath:@”/Library/MobileSubstrate/MobileSubstrate.dylib”]){
        return YES;
    }else if([[NSFileManager defaultManager] fileExistsAtPath:@”/bin/bash”]){
        return YES;
    }else if([[NSFileManager defaultManager] fileExistsAtPath:@”/usr/sbin/sshd”]){
        return YES;
    }else if([[NSFileManager defaultManager] fileExistsAtPath:@”/etc/apt”]){
        return YES;
    }
    return NO;

    NSError *error;
    NSString *stringToBeWritten = @"This is a test.";
    [stringToBeWritten writeToFile:@”/private/jailbreak.txt” atomically:YES encoding:NSUTF8StringEncoding error:&error];
    if(error==nil){
        //Device is jailbroken
        return YES;
    } else {
        //Device is not jailbroken
        [[NSFileManager defaultManager] removeItemAtPath:@”/private/jailbreak.txt” error:nil];
    }
    if([[UIApplication sharedApplication] canOpenUrl: [NSURL URLWithString:@”cydia://package/com.example.package”]]){
        //Device is jailbroken
    }
#endif
  
    //All checks have failed. Most probably, the device is not jailbroken
    return NO;
}

함수 정의,  UIViewController대신에 원하는 타입의 부모클래스를 넣으면 됨

func isAleadyVC<T>(_ vcs:[UIViewController]?, _ tp: T.Type) -> UIViewController? {
	for i in 0 ..< vcs!.count {
		if (vcs![i] as? UINavigationController) != nil {
			let nc = vcs![i] as! UINavigationController
			if let vc = isAleadyVC(nc.children, tp) {
				return vc
			}
		}
		else if (vcs![i] as? UITabBarController) != nil {
			let tc = vcs![i] as! UITabBarController
			if let vc = isAleadyVC(tc.children, tp) {
				return vc
			}
		}
		else { // always UIViewController
			let vc = vcs![i]
			if type(of: vc) == tp {
				return vc
			}
			if let vc = isAleadyVC(vc.children, tp) {
				return vc
			}
		}
	}
	return nil
}

사용

if let homeVC = isAleadyVC(self.window?.rootViewController?.children, HomeVC.self) as? HomeVC {
	...
}