我无法在Mac上的Mac催化剂应用程序中从密钥链中写入/读取,它分别返回错误34018和25300。有没有办法让键盘链在催化剂应用程序中在Mac上工作呢?代码打印“我的秘密蜜蜂”,以表明我们已经成功地将这篇文章写到密钥链,然后从它中读取。] = [ kSecAttrAccount as String: itemKey as AnyObject] = [
kSecClass as
升级到1.2之后,我有编译错误:代码:其他企图:let dateCreated = photoCommentObjects[indexPath.row].createdAt as? NSDateDowncast from NSDate?! to 'NSDate' only unwraps optionals
我正在尝试从Firebase数据库读取嵌套的数据结构,但我不知道如何管理String:AnyObject可能为0的对象时的情况。var timeStampFeesSaved: [String:AnyObject]! outstandingFees: AnyObject?= nil, //value might not exist when reading
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