苹果iOS中滚动视图类（UIScrollView）的循环以及动态加载图片的算法

摘要

在ios设备中，内存的消耗性能非常重要，通过在视图类的代理类中响应滚动函数，实现了让视图类所管理的图片进行循环预览以及为了改善内存消耗，进行动态图片的加载，显著提高了性能以及扩展了ios库中原类的新功能。%Memory consumption is very important in ios device development. This article implements preview of picture managed by view class by responding scroll fimction in delegate class of view class, and realizes loading picture dynamically to improve performance. It improves performance significantly and expands new function in ios library.