objective-c

Encrypt AES/CBC/PKCS7Padding

由 坚强是说给别人听的谎言 提交于 2021-02-11 07:44:58
问题 Help me to make encryption AES/CBC/PKCS7Padding ? Below is my code to decrypt AES/CBC/PKCS7 . It's working but when I encrypt some string and decrypt from my self it's error. Below i adding code to encrypt and decrypt AES/CBC/PKCS7Padding. - (NSData *)AES256Encrypt:(id)key { NSString *iv = @"FEDCBA9876543210"; NSData *keyPtr = [key copy]; size_t dataLength = [self length]; NSData *ivPtr = [iv dataUsingEncoding:NSUTF8StringEncoding]; //NSData *encrypted = [self subdataWithRange:NSMakeRange(0,

Encrypt AES/CBC/PKCS7Padding

由 痴心易碎 提交于 2021-02-11 07:44:11
问题 Help me to make encryption AES/CBC/PKCS7Padding ? Below is my code to decrypt AES/CBC/PKCS7 . It's working but when I encrypt some string and decrypt from my self it's error. Below i adding code to encrypt and decrypt AES/CBC/PKCS7Padding. - (NSData *)AES256Encrypt:(id)key { NSString *iv = @"FEDCBA9876543210"; NSData *keyPtr = [key copy]; size_t dataLength = [self length]; NSData *ivPtr = [iv dataUsingEncoding:NSUTF8StringEncoding]; //NSData *encrypted = [self subdataWithRange:NSMakeRange(0,

How to interleave a non-interleaved AudioBufferList inside a render callback?

由 孤街醉人 提交于 2021-02-11 06:53:34
问题 I'm working on a project that involves streaming audio from an AVPlayer video player object into libpd using an MTAudioProcessingTap . For the process loop of the tap, I used PdAudioUnit s render callback code as a guide; but I realized recently that the audio format expected by libpd is not the same as the audio coming from the tap — that is, the tap is providing two buffers of non-interleaved audio data in the incoming AudioBufferList, whereas libpd expects interleaved samples. I don't

How do you make a Swift class available in an XPC service?

由 烈酒焚心 提交于 2021-02-11 04:32:00
问题 I'm attempting to rebuild Apple's XPC "lowerCase" sample code from Objective-C to Swift. I understand XPC will, but I'm relatively new to Swift and Objective-C interoperability. When I use their exact sample code, which passes a String from the app to the target and back, it works. But when I try and replace that with my own custom class, Person , I get the error: NSXPCConnection: ... connection on anonymousListener or serviceListener from pid 4133: Exception caught during decoding of

How to get all available Paper Feeds and how to change it in NSPrintInfo obj

由 与世无争的帅哥 提交于 2021-02-11 04:31:28
问题 I'm trying to set the paper feed in a NSPrintInfo object By now, I'm obtaining the paper feed options (from now on trays) from an IPP call ipp_t *request; request = ippNewRequest(IPP_GET_PRINTER_ATTRIBUTES); ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, printer_uri); respose = cupsDoRequest(http, request, "/"); ... string trays = ippGetString(ippFindAttribute(response, "media-source-supported", IPP_TAG_KEYWORD), 0, NULL); This returns me a comma-separated string

How to get all available Paper Feeds and how to change it in NSPrintInfo obj

由 我的梦境 提交于 2021-02-11 04:29:54
问题 I'm trying to set the paper feed in a NSPrintInfo object By now, I'm obtaining the paper feed options (from now on trays) from an IPP call ipp_t *request; request = ippNewRequest(IPP_GET_PRINTER_ATTRIBUTES); ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, printer_uri); respose = cupsDoRequest(http, request, "/"); ... string trays = ippGetString(ippFindAttribute(response, "media-source-supported", IPP_TAG_KEYWORD), 0, NULL); This returns me a comma-separated string

How do you make a Swift class available in an XPC service?

由 半腔热情 提交于 2021-02-11 04:27:22
问题 I'm attempting to rebuild Apple's XPC "lowerCase" sample code from Objective-C to Swift. I understand XPC will, but I'm relatively new to Swift and Objective-C interoperability. When I use their exact sample code, which passes a String from the app to the target and back, it works. But when I try and replace that with my own custom class, Person , I get the error: NSXPCConnection: ... connection on anonymousListener or serviceListener from pid 4133: Exception caught during decoding of

How do you make a Swift class available in an XPC service?

由 孤街醉人 提交于 2021-02-11 04:25:41
问题 I'm attempting to rebuild Apple's XPC "lowerCase" sample code from Objective-C to Swift. I understand XPC will, but I'm relatively new to Swift and Objective-C interoperability. When I use their exact sample code, which passes a String from the app to the target and back, it works. But when I try and replace that with my own custom class, Person , I get the error: NSXPCConnection: ... connection on anonymousListener or serviceListener from pid 4133: Exception caught during decoding of

Adding UICollectionViewController to UIViewController Not Working

由 这一生的挚爱 提交于 2021-02-10 22:22:55
问题 I have a UIViewController and a UICollectionViewController . I add the UICollectionViewController to the UIViewController using the following: UICollectionViewFlowLayout* flowLayout = [[UICollectionViewFlowLayout alloc]init]; [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal]; self.toolsCollectionViewController = [[ToolsCollectionViewController alloc] initWithCollectionViewLayout:flowLayout]; self.toolsCollectionViewController.view.backgroundColor = [UIColor clearColor]

十年后将要消失的五种编程语言

由 本小妞迷上赌 提交于 2021-02-10 19:01:09
点击上方“ Python进击者 ”，选择“ 星标 ”公众号 超级无敌干货每日18：00推送给你！！！ 作者 | Program Ace 译者 | 王坤祥 策划 | 小智 本文作者从自己的观点出发，介绍了未来 20 年内可能消失的 5 个编程语言，并给出了具体的原因。最后对想要学习编程的初学者给出了学习建议。 随着时间的流逝，程序员们发现了更新、更简单的工作方式，新的编程语言如雨后春笋般出现，但只有少数编程语言能成为社区的新宠。这种进步的一个副作用是一些古老的编程语言必然会跟历史一样被人们遗忘。如果一个编程语言无法随着时间的推移提升其价值，那么它的用户群终将会流失，并逐渐淡出人们的视线，或者成为更新一代编程语言的基础。 最近，古老的 COBOL 编程语言上了热搜。在 1960 年代和 1970 年代，它曾经是许多美国银行和政府机构的首选的编程语言，但最终被更加简单有效的编程语言所取代。但是，使用 COBOL 构建的系统仍然存在，当一些政府机构发现他们需要通过更新代码来全面改革失业系统时，才发现业内没有几个开发人员可以熟练使用该编程语言。 沧海桑田，COBOL 早已物是人非。我们当前的许多编程语言也注定会有相似的下场。本文中，我们将分析未来 20 内最终会消失的 5 种编程语言。我知道这可能会伤害到那些正在使用这几个编程语言的程序员的内心
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