今天偶然发现 iOS10 下又多出
- __NSSingleObjectArrayI
- __NSSingleObjectSetI
- __NSSingleEntryDictionaryI
三个类。当容器内只有单个元素时才会创建 xxxSinglexxx 实例， iOS9 中加入了 0 个元素的类：
- __NSArray0
- __NSDictionary0
问题是添加这些特殊的类有何意义呢？求大牛指点~
iOS 开发实用技术导航
NSHipster 中文版
› http://nshipster.cn/
cocos2d 开源 2D 游戏引擎
› http://www.cocos2d-iphone.org/
CocoaPods
› http://cocoapods.org/
Google Analytics for Mobile 统计解决方案
› http://code.google.com/mobile/analytics/
WWDC
› https://developer.apple.com/wwdc/
Design Guides and Resources
› https://developer.apple.com/design/
Transcripts of WWDC sessions
› http://asciiwwdc.com
Cocoa with Love
› http://cocoawithlove.com/
Cocoa Dev Central
› http://cocoadevcentral.com/
NSHipster
› http://nshipster.com/
Style Guides
› Google Objective-C Style Guide
› NYTimes Objective-C Style Guide
Useful Tools and Services
› Charles Web Debugging Proxy
› Smore
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