Ios 钥匙链可以’；找不到项目，但可以’；不创建项目

iOS上的钥匙链真的有问题

下面是self.keychainItemQuery：

{
    kSecClass = kSecClassGenericPassword;
    kSecAttrGeneric = "com.mycompany.player";
    kSecMatchLimit = kSecMatchLimitOne;
    kSecReturnAttributes = kCFBooleanTrue;
}

当我这样做的时候

OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)self.keychainItemQuery, &attributes);

我明白了

status == errSecItemNotFound

好的，这里是self.keychainItemData：

{
    kSecAttrAccount = "";
    kSecClass = kSecClassGenericPassword;
    kSecAttrDescription = "";
    kSecAttrGeneric = "com.mycompany.player";
    kSecAttrLabel = "";
    kSecValueData = <35663636 65623135 64303139 65363535>;
}

我明白了

我以为钥匙链上的物品被锁死了

kSecAttrGeneric

。上面的查询在代码中的其他点查找keychain项。我觉得我遗漏了一些关于为什么这不起作用的细节。

这是关于你的问题的

简而言之，您还需要为键

kSecAttrAccount

和

kSecAttrService

设置值

kSecClassGenericPassword

显然是根据这两个值确定钥匙链条目的唯一性

您可以在

kSecAttrService

中重用

kSecAttrGeneric

的值，但每个钥匙链条目都需要一个唯一的

kSecAttrAccount

值

更新示例时，

self.keychainItemQuery

将变为：

{
    kSecClass = kSecClassGenericPassword;
    kSecAttrGeneric = "com.mycompany.player";
    kSecAttrAccount = "account";               // This value should be unique for each entry you add
    kSecAttrService = "com.mycompany.player";
    kSecMatchLimit = kSecMatchLimitOne;
    kSecReturnAttributes = kCFBooleanTrue;
}

{
    kSecAttrAccount = "";
    kSecClass = kSecClassGenericPassword;
    kSecAttrDescription = "";
    kSecAttrGeneric = "com.mycompany.player";
    kSecAttrAccount = "account";               // This value should be unique for each entry you add
    kSecAttrService = "com.mycompany.player";
    kSecAttrLabel = "";
    kSecValueData = <35663636 65623135 64303139 65363535>;
}

而

self.keychainItemData

变成：

{
    kSecClass = kSecClassGenericPassword;
    kSecAttrGeneric = "com.mycompany.player";
    kSecAttrAccount = "account";               // This value should be unique for each entry you add
    kSecAttrService = "com.mycompany.player";
    kSecMatchLimit = kSecMatchLimitOne;
    kSecReturnAttributes = kCFBooleanTrue;
}

{
    kSecAttrAccount = "";
    kSecClass = kSecClassGenericPassword;
    kSecAttrDescription = "";
    kSecAttrGeneric = "com.mycompany.player";
    kSecAttrAccount = "account";               // This value should be unique for each entry you add
    kSecAttrService = "com.mycompany.player";
    kSecAttrLabel = "";
    kSecValueData = <35663636 65623135 64303139 65363535>;
}

{
kSecAttrAccount=“”；
kSecClass=kSecClassGenericPassword；
kSecAttrDescription=“”；
kSecAttrGeneric=“com.mycompany.player”；
kSecAttrAccount=“account”//此值对于您添加的每个条目都应该是唯一的
kSecAttrService=“com.mycompany.player”；
kSecAttrLabel=“”；
kSecValueData=；
}