objective-c - 请教一个macosx开发的问题

Question

想学习macosx开发，目前都是ios开发的多，有几个问题：
1.学习完object-c后，应该从哪里入手学习？
2.有哪些macosx界面开发（不是ios）的资源，如书籍（新点的）或者网站推荐？
3.对于macosx程序的结构不是很清楚，哪有教程能讲的比较明白的？
谢谢。

Answer 1

1 After learning objective-c, you can learn Swift
2 The front-end principle of Cocoa used by MacOS is very similar to that of iOS. You can read Cocoa Programming developed by Apple (original book 4th edition)
3 Learning resources
http://www. cimgf.com/
https://www.objc.io/
www.raywenderlich.com/