呆萌院长

http://nshipster.cn/associated-objects/#import Objective-C开发者应该小心谨慎地遵循这个危险咒语的各种准则。一个很好的原因的就是：混乱的运行时代码会改变运行在其架构之上的所有代码。从利的角度来讲，  中的函数具有其他方式做不到的、能为应用和框架提供强大功能的能力。而从弊的角度来讲，它可能会会毁掉代码的sanit

http://nshipster.com/network-link-conditioner/Product design is about empathy. Knowing what a user wants, what they like, what they dislike, what causes them frustration, and learning to underst

http://nshipster.com/ios7/With the NDA finally lifted, we can finally talk about all of the amazing new APIs in iOS 7. And there are a lot of them. "1500 new APIs", by Apple's count during the W

http://nshipster.com/xcode-snippets/iOS development all but requires the use of Xcode. To its credit, Xcode has improved pretty consistently over the last couple of years. Sure, it still has its

http://nshipster.com/afnetworking-2/AFNetworking is one of the most widely used open source projects for iOS and Mac OS X development. It powers thousands of popular and critically acclaimed app

http://nshipster.com/nshashtable-and-nsmaptable/NSSet and NSDictionary, along with NSArray are the workhorse collection classes of Foundation. Unlike other standard libraries, implementa

http://nshipster.com/xcode-snippets/iOS development all but requires the use of Xcode. To its credit, Xcode has improved pretty consistently over the last couple of years. Sure, it still has its

http://nshipster.com/equality/The concept of equality is a central point of debate and inquiry in philosophy and mathematics, with far-reaching implications for matters of ethics, justice, and p

http://nshipster.com/nspredicate/NSPredicate is a Foundation class that specifies how data should be fetched or filtered. Its query language, which is like a cross between a SQL WHERE clau

http://nshipster.com/uimenucontroller/Mobile usability today is truly quite remarkable—especially considering how far it's come in just the last decade. What was once a clumsy technology rel

http://nshipster.com/nshipster-quiz-3/NSHipster Pub Quiz came to New York City on July 30th. Like our first and second quizzes, questions ranged from random Apple trivia to obscure framewo

http://nshipster.com/documentation/There's an adage among Cocoa developers that Objective-C's verbosity lends its code to being effectively self-documenting. Between longMethodNamesWithNamed

http://nshipster.com/random/What passes for randomness is merely a hidden chain of causality.In a mechanical universe of material interactions expressed through mathematical equations, it

http://nshipster.com/nshashtable-and-nsmaptable/NSSet and NSDictionary, along with NSArray are the workhorse collection classes of Foundation. Unlike other standard libraries, implementa

http://nshipster.com/nssortdescriptor/NSSortDescriptorWritten by Mattt Thompson on Jul 24th, 2012Sorting: the old mainstay of the exams of an intro CS class and whiteboards of an entry-l

http://nshipster.com/uuid-udid-unique-identifier/NSUUID / CFUUIDRef / UIDevice -uniqueIdentifier / -identifierForVendorWritten by Mattt Thompson on Jun 24th, 2013Let's say you're mak

http://nshipster.com/xcode-key-bindings-and-gestures/The extent to which programming-as-craft is compared to manual disciplines like woodworking is tiresome. It's absolutely the case that one sh

http://nshipster.com/key-value-observing/Ask anyone who's been around the NSBlock a few times: Key-Value Observing has the worst API in all of Cocoa. It's awkward, verbose, and confusing. And wo

http://nshipster.com/launch-arguments-and-environment-variables/Walk into any American fast food establishment, and you'll be greeted with a colorful, back-lit display of specials, set menus

http://nshipster.cn/namespacing/为什么Objecive-C中的很多类名都是NS开头的呢？我保证在你第一次给别人介绍Objective-C的时候肯定会听到这句话。就像父母要向孩子解释什么是死亡或者圣诞老人是不存在的问题一样，父母总是寄希望时间会让孩子自己找到答案。你既然这么问了，实际上NS代表了NeXTSTEP（好吧，其实是代表

外存被用于写入可持续化保存的数据，但当数据生命周期很短时，用Objective-C操作临时文件的资料却很少（可能有，不过这些资料本身也是“临时”的）。临时文件的作用是在硬盘上简历buffer，既不会被原子化地转移到固定位置，也不会被某种合理的方式处理和销毁。需要找到文件系统上适当的位置、生成一个唯一的名字、再用完之后移动或删除文件的构思，才能去建立临时文件。寻找依赖目录

http://nshipster.cn/nsurl/这里有一个直观的描述来解释什么是“一维数据类型”：number或string被格式化为多种多样的值，可以通过数学运算或某种转换方法可以算出它们的值。比如：十六进制的颜色值 #EE8262 的红绿蓝三原色的值通过掩码或移位运算得出；正则表达式可以通过少量字符中复杂的样本中进行匹配。在所有的一维数据类型中，URI有着至高地位。单独

http://nshipster.cn/nsindexset/NSIndexSet (以及它的可修改子类, NSMutableIndexSet) 是一个排好序的，无重复元素的整数集合。它看上去有点像 支持离散整数的 NSRange .它能用于快速查找特定范围的值的索引，也能用于快速计算交集, 同时，Foundation collection class 提供了很多好用的方法，方便你

http://nshipster.cn/nscache/可怜的 NSCache 一直处于 NSMutableDictionary 的阴影之下。就好像没有人知道它提供了垃圾处理的功能，而开发者们却费劲力气地去自己实现它。没错，NSCache 基本上就是一个会自动移除对象来释放内存的 NSMutableDictionary。无需响应内存警告或者使用计时器来清除缓存。唯一的不同之处是键对象不会像 NSM

http://nshipster.com/extended-file-attributes/Amidst revelations of widespread spying by the NSA, the concept of metadata has taken an unexpected role in the national conversation about governme

http://nshipster.com/nsrange/NSRange is one of the essential types of Foundation. Passed around and returned in methods throughout the framework, being well-versed in this struct has a range o

http://nshipster.com/colophon/As a way to kick off this new year, I thought it'd be fun to share some insights of just how NSHipster is made. This article covers both the website and the recentl

http://nshipster.com/launch-options/AppDelegate is the dumping ground for functionality in iOS.Application lifecycle management? URL routing? Notifications? Core Data incantations? Invasive

http://nshipster.com/multipeer-connectivity/As consumer web technologies and enterprises race towards cloud infrastructure, there is a curious and significant counter-movement towards connected

http://nshipster.com/nsfilemanager/NSFileManager is Foundation's high-level API for working with file systems. It abstracts Unix and Finder internals, providing a convenient way to create, rea

http://nshipster.com/nsformatter/Conversion is the tireless errand of software development. Most programming tasks boil down to some variation of transforming data into something more useful.

http://nshipster.com/nshipster-quiz-4/The fourth and final NSHipster pub quiz of the year was held in the beautiful city of Amsterdam on October 22nd, with help from the good folks at Appste

http://nshipster.com/xctool/Control the build system, and you control the destiny of the language, its ecosystem, and community.Objective-C has changed so very much in such a very sh

http://nshipster.com/nserror/To err is human.To NSError is Cocoa.All programs on a Unix system are a child process of another process, forking all the way from the original process, th

http://nshipster.com/enumerators/NSFastEnumeration / NSEnumerator / -enumerateObjectsUsingBlock:Written by Mattt Thompson on Jul 1st, 2013Enumeration is where computation gets intere

http://nshipster.com/kvc-collection-operators/KVC Collection OperatorsWritten by Mattt Thompson on Dec 3rd, 2012Rubyists laugh at Objective-C's bloated syntax.Although we lost a fe

http://nshipster.com/at-compiler-directives/@Written by Mattt Thompson on Oct 8th, 2012Birdwatchers refer to it as (and I swear I'm not making this up) "Jizz": those indefinable char

http://nshipster.com/type-encodings/Type EncodingsWritten by Mattt Thompson on Feb 4th, 2013From number stations and numerology to hieroglyphs and hobo codes, there is something tr

http://nshipster.com/nsvalue/NSValueWritten by Mattt Thompson on Jan 28th, 2013As part of playing the role of Abraham Lincoln in the eponymous 2012 biopic, Daniel Day-Lewis would ins

http://nshipster.com/reader-submissions-new-years-2013/Reader Submissions - New Year's 2013Written by Mattt Thompson on Dec 31st, 2012In celebration of the forthcoming year++, I thou