but! The above method installation environment cannot support Objective-c 2.0, which is simply too weak. I found some ways to install 2.0 under Windows, as follows. Although I successfully installed it, there will be inexplicable errors when running under Windows, the effect is very bad, and it is very unfriendly to novice programmers.
Therefore, it is strongly not recommended to install Objective-c programming environment under Windows . This is a waste of life.
So how to learn Objective-c 2.0 under Windows
Yes, when you want to learn Objective-c 2.0 and read my blog, buddy, you are so lucky. I used the lessons I spent two days on and came up with a good method: online compiler
Here is an online compiler that supports Objective-c 2.0: paiza.IO