Swift语言操作keyChain

首先是保存数据

func saveData(){
        let key = "name1"
        let value = "liu"
        let valueData = value.data(using: String.Encoding.utf8,allowLossyConversion: false)
        let service = Bundle.main.bundleIdentifier!
        //kSecAttrService该键值通常表示为应用bundle标识符的字符串
        //kSecAttrAccount表示存贮数据对象的键，一般是账号
        //kSecValueData该值通常是 kSecAttrAccount对应的数值
        print("valueData:(valueData)")
        let secItem = [
            kSecClass as NSString:kSecClassGenericPassword as String,
            kSecAttrService as String : service,
            kSecAttrAccount as String : key,
            kSecValueData as String : valueData!
            ] as NSDictionary
        var requestResult : AnyObject?
        let status = Int(SecItemAdd(secItem,&requestResult))
        
        switch status {
        case Int(errSecSuccess):
            print("成功")
        case Int(errSecDuplicateItem):
            print("重复插入")
        default:
            print("error")
        }
    }

 查找数据的方式：直接查找value 

        let keyToSearchFor = "name1"
        let service = Bundle.main.bundleIdentifier!
        let query = [
            kSecClass as NSString:kSecClassGenericPassword as String,
            kSecAttrService as String : service,
            kSecAttrAccount as String : keyToSearchFor,
            kSecReturnData as String : kCFBooleanTrue,
            ] as NSDictionary
        
        var valueAttributes : AnyObject?
        let results = SecItemCopyMatching(query, &valueAttributes)
        if results == Int(errSecSuccess) {
            if let resultsData = valueAttributes as? Data{
                    let value = String(data: resultsData, encoding: String.Encoding.utf8)
                    print("----------------------------    (value)")
            }
        }

 查找其他的数据

        let keyToSearchFor = "name1"
        let service = Bundle.main.bundleIdentifier!
        let query = [
            kSecClass as NSString:kSecClassGenericPassword as String,
            kSecAttrService as String : service,
            kSecAttrAccount as String : keyToSearchFor,
            kSecReturnAttributes as String : kCFBooleanTrue,
            ] as NSDictionary

        var valueAttributes : AnyObject?
        let results = SecItemCopyMatching(query, &valueAttributes)
        if results == Int(errSecSuccess) {
            if let resultsDic = valueAttributes as? NSDictionary{
                let username = resultsDic[kSecAttrAccount as String] as? String//name1
                let accesGroup = resultsDic[kSecAttrAccessGroup as String] as? String
                let createDate = resultsDic[kSecAttrCreationDate as String] as? Date//日期
                let serviceVlue = resultsDic[kSecAttrService as String] as? String
                print("username:(username)  accesGroup:(accesGroup) createDate:(createDate)  serviceVlue:(serviceVlue)")
            }
        }

 warn: kSecReturnAttributes如果需要获取置顶属性的值，Birkin创建日期和修改日期，则需要向自添加这个属性，如果获取要是串存储的值，则需要是使用kSecReturnData

数据更新：

        let keyToSearchFor = "name1"
        let service = Bundle.main.bundleIdentifier!
        let query = [
            kSecClass as NSString:kSecClassGenericPassword as String,
            kSecAttrService as String : service,
            kSecAttrAccount as String : keyToSearchFor,
            ] as NSDictionary
        
        var valueAttributes : AnyObject?
        let results = SecItemCopyMatching(query, &valueAttributes)
    
        if results == Int(errSecSuccess) {
            let newData = "newdata".data(using: String.Encoding.utf8,allowLossyConversion: false)
            let update = [
                kSecValueData as String:newData!
            ] as NSDictionary
            let updateed = SecItemUpdate(query, update)
            print("---------------------???:(updateed)")
            if updateed == Int(errSecSuccess){
                print("更新成功")
            }else{
                print("更新失败")
            }
            
        }else{
            print("没有查询到")
        }

数据删除：

        let keyToSearchFor = "name1"
        let service = Bundle.main.bundleIdentifier!
        let query = [
            kSecClass as NSString:kSecClassGenericPassword as String,
            kSecAttrService as String : service,
            kSecAttrAccount as String : keyToSearchFor,
            ] as NSDictionary
        let results = SecItemDelete(query)

        if results == Int(errSecSuccess) {

            print("删除成功")
        }else{
            print("删除失败")
        }

warn:如果想多个项目使用一个chain，可以使用kSecAttrAccessGroup，但是前提是多个项目在一个team里面，这个配置的team的名字，boundleid就需要使用写入数据应用的bundle id就不能是当前应用的bundle id了

kSecAttrAccessGroup as String:""

 

对iCloud中钥匙串的读写可以使用在添加查询的字典中加入

kSecAttrSynchronizable as String:kCFBooleanTrue