添加 阴影 圆角

iOS UIView添加陰影 (UIView add shadow) step1: add QuartzCore.framework step2: #import <QuartzCore/QuartzCore.h> step3: use code [[myView layer] setShadowOffset:CGSizeMake(5, 5)]; [[myView layer] setShadowRadius:6]; [[myView layer] setShadowOpacity:1]; [[myView layer] setShadowColor:[UIColor blueColor].CGColor]; 2.添加圆 btn.layer.cornerRadius=8; btn.layer.masksToBounds =YES;//使用边界来做遮罩