详细资料,请参看苹果官方文档Keychain Services Reference . ios中的keychain,用于保存用户的机密信息,对keychain的操作有4种,就是 增,删,改,查: SecItemCopyMatching 查 Returns one or more keychain items that match a search query, or copies attributes of specific keychain items. SecItemAdd 增 Adds o…