1、去掉xcode编译warning:ld: warning: directory not found for option '-L
选择工程, 编译的 (targets)
选择 Build Settings 菜单查找 Library Search Paths 和 Framework Search Paths, 删掉编译报warning的路径即OK
2、xxx库--image not Found编译错误
将库的选项从required变为 Optional
3、: directory not found for option -f
library not found -lxxxx.a
将库重新删除然后重新添加一遍(解除引用即可)