Use CocoaPods:
【1】 Podfile add pod 'SDWebImage/WebP'
【2】 in Build Settings -- Preprocessor Macros , add SD_WEBP=1
Add files into project:
【1】Cloneand addWebP.framework
clone the repository usinggit clone --recursive https://github.com/rs/SDWebImage.git
add full folder of SDWebImage and WebP.framework into your project.
【2】 in Build Settings -- Preprocessor Macros , add SD_WEBP=1