https://www.raywenderlich.com/1888/ios-tutorial-how-to-create-a-simple-iphone-app-tutorial-part-3
shenguanjiejie/RWTRateView
from: https://www.raywenderlich.com/1888/ios-tutorial-how-to-create-a-simple-iphone-app-tutorial-part-3
Objective-C
from: https://www.raywenderlich.com/1888/ios-tutorial-how-to-create-a-simple-iphone-app-tutorial-part-3
Objective-C