ios图片随手指拖动放大并变模糊效果源码，源码TwitterCover，向下拖动ScrollView时，ScrollView上方的图片会随着手指的拖动而放大并且变模糊。松开手指之后，图片随着ScrollView的回复原来位置而恢复原样。这种效果出现在Twitter应用中的，大家不妨也可以研究一下吧，更多ios源码尽在源码天堂ios源码频道。 TwitterCover is a parallax top view with real time blur effect to any UIScrollView, inspired by Twitter for iOS. Completely created using UIKit framework. Easy to drop into your project. You can add this feature to your own project, TwitterCover is easy-to-use.