TouchGirl橡皮擦效果代码例子——手指划过屏幕时会“擦”掉上层图片。实际上是准备了两个 UIImageView，手指划过时显示下方的 UIImageView。-TouchGirl eraser effect of the code example- a finger across the screen will "wipe" off the top picture. Actually prepared two UIImageView, displayed when a finger acr

iPad上使用的绘图，画板，添加了橡皮擦和插入文本功能-drawing on the iPad use, drawing board, adding eraser and insert text function

橡皮擦功能 -erase eraseeraseeraseeraseerase