随便打开一个project,在左边的Frameworks,随便找一个framework,比如Foundation.framework,单击右键,选择show in finder。就可以查看sdk所在的目录;
比如我按这样操作,得到路径如下:
/Applications/Xcode.app/Contents/Developer/Platforms/
iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks
Frameworks下面都是公有api;
/Applications/Xcode.app/Contents/Developer/Platforms/
iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/PrivateFrameworks
PrivateFrameworks就是私有api;