通过API检索签名标识列表

@Jamesbucanek,比你的链接!下面是使用keychain services api生成的代码。可能对其他人有用:

let query: [String: Any] = [
    kSecClass as String: kSecClassIdentity,
    kSecReturnRef as String: kCFBooleanTrue,
    kSecMatchLimit as String: kSecMatchLimitAll
]
var items: CFTypeRef?

// Get list of all SecIdentity from Keychain without limiting search and without any filtering applied
guard SecItemCopyMatching(query as CFDictionary, &items) == errSecSuccess, let array = items as? NSArray else {
    return
}

for item in array {
    let identity = item as! SecIdentity
    var certificate: SecCertificate?

    // Get SecCertificate out of SecIdentity object (it contains both SecCertificate and SecKey
    if SecIdentityCopyCertificate(identity, &certificate) == errSecSuccess {

        var commonName: CFString?
        // Print name for each certificate
        if SecCertificateCopyCommonName(certificate!, &commonName) == errSecSuccess {
            print(commonName! as String)
        }
    }
}