1.localhost:hello apple$ cd hello
2.localhost:hello apple$ ls
3.hello         hello.1
4.hello-Prefix.pch  main.m
5.localhost:hello apple$ clang -fobjc-arc -framework Foundation main.m -o first
6.localhost:hello apple$ ./first
7.2013-10-16 11:04:11.052 first[276:707] Hello, World!

iOS开发