获取密钥链的属性返回NSArray

#import <Security/Security.h>

- (NSArray *)getKeychainAttributes {
    NSDictionary *query = @{
        (__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
        (__bridge id)kSecReturnAttributes: (__bridge id)kCFBooleanTrue,
        (__bridge id)kSecMatchLimit: (__bridge id)kSecMatchLimitAll
    };
    
    CFArrayRef result = NULL;
    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, (CFTypeRef *)&result);
    
    if (status == errSecSuccess) {
        return (__bridge_transfer NSArray *)result;
    } else {
        NSLog(@"Failed to retrieve keychain attributes with status: %d", (int)status);
        return nil;
    }
}