// 加密文件事例
NSString *docDir = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *toPath = [docDir stringByAppendingPathComponent:@"database.db"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:toPath]) {
NSString *inPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"database.db"];
NSError *error = nil;
if (![[NSFileManager defaultManager] AESEncryptFile:inPath toFile:toPath usingPassphrase:@"password" error:&error])
{
NSLog(@"加密文件失败：%@", [[error userInfo] objectForKey:AESEncryptionErrorDescriptionKey]);
}
/************** if (![[NSFileManager defaultManager] AESDecryptFile:inPath toFile:toPath usingPassphrase:@"password" error:&error]) { NSLog(@"解密文件失败：%@", [[error userInfo] objectForKey:AESEncryptionErrorDescriptionKey]); } ***************/ }