Update 17Optional Chaining.md
Update 17Optional Chaining.md
Update 17Optional Chaining.md
Update 17Optional Chaining.md

This raw version is alpha and needs to be retouched by myself later. Any suggestions and blame plz @狙击手 in the group.
Merge pull request #54 from Jasonbroker/master

02章17节更新
Merge pull request #1 from CocoaChina-editors/master

简单raw版本
校正部分翻译
Merge branch 'master' of https://github.com/CocoaChina-editors/Welcome-to-Swift
Update 17Optional Chaining.md
Merge pull request #55 from Jasonbroker/master

some adjustments
Using Swift with Cocoa and Objective-C chapter 3
修复图片链接
swift functions

本章还没有翻译完 测试提交...
Merge pull request #56 from haolloyin/master

Using Swift with Cocoa and Objective-C 第三章 03Mix and Match
Merge pull request #1 from CocoaChina-editors/master

合并更新代码
Update 04Adopting Cocoa Design Patterns.md
Update 04Adopting Cocoa Design Patterns.md
勘误01

for syntax
Merge pull request #57 from Jasonbroker/master

勘误01
Update 04Adopting Cocoa Design Patterns.md