jpeg链接错误 iOS

1. Go to : [[http://sourceforge.net/projects/libjpeg-turbo/files/1.4.0/]] and download the libjpeg-turbo-1.4.0.dmg (3.8 MB) file.
2. Install the package. Once its done you will find the installed files under this path : /opt/libjpeg-turbo/lib
3. Open up your terminal and type the following command : lipo -info /opt/libjpeg-turbo/lib/libjpeg.a
4. If the terminal shows the following the output after running the command then it means, you can use the library for your iOS project(armv7/armv7s) * Architectures in the fat file: /opt/libjpeg-turbo/lib/libturbojpeg.a are: i386 x86_64 armv6 armv7 armv7s arm64* 
5. Use finder to navigate to : /opt/libjpeg-turbo/lib and copy libjpeg.a and place it in your project folder.
6. Head over to your XCode project -> Click on Project Name -> Targets -> General -> Linked frameworks and libraries -> Click on the add button placed at the bottom -> include the libjpeg.a file
7. Compile the project. It shouldn't show any more linker errors.