https://github.com/MartinRGB/Replace-iOS
https://github.com/coolbeet/CBStoreHouseRefreshControl
https://github.com/Yalantis/Pull-to-Refresh.Rentals-iOS
https://github.com/KittenYang/KYJellyPullToRefresh
https://github.com/d-ronnqvist/blogpost-codesample-PullToRefresh
https://github.com/JackTeam/PathCover
https://github.com/cemolcay/PullToRefreshCoreText
https://github.com/iKingsly/iKYLoadingHUb
https://github.com/Realank/JumpLoading
https://github.com/poolqf/PQFCustomLoaders
https://github.com/liuzhiyi1992/WaveLoadingView
https://github.com/SergioChan/SCCatWaitingHUD
这个加载动画比较牛逼 https://github.com/iamim2/OneLoadingAnimation
https://github.com/yehot/CircularImageLoder
https://github.com/zzz40500/android-shapeLoadingView
http://www.jianshu.com/p/716b42c31f5c