定制属于你自己的阴影效果
#import <QuartzCore/QuartzCore.h>@implementation UIView (NKShadow)// add the shadow effect to the view-(void)addShadow{ self.layer.shadowOpacity = 0.4; self.layer.shadowRadius = 0.9; self.layer.shadowOffset = CGSizeMake(0, 0); UIBezierPath *path = [UIBezierPath bezierPath]; CGPoint p1 = CGPointMake(self.frame.origin.x, self.frame.origin.y+self.frame.size.height); CGPoint p2 = CGPointMake(self.frame.origin.x+self.frame.size.width, p1.y); CGPoint c1 = CGPointMake((p1.x+p2.x)/4 , p1.y+6.0); CGPoint c2 = CGPointMake(c1.x*3, c1.y); [path moveToPoint:p1]; [path addCurveToPoint:p2 controlPoint1:c1 controlPoint2:c2]; self.layer.shadowPath = path.CGPath;}-(void)addGrayGradientShadow{ // 0.8 is a good feeling shadowOpacity self.layer.shadowOpacity = 0.4; // The Width and the Height of the shadow rect CGFloat rectWidth = 10.0; CGFloat rectHeight = self.frame.size.height; // Creat the path of the shadow CGMutablePathRef shadowPath = CGPathCreateMutable(); // Move to the (0, 0) point CGPathMoveToPoint(shadowPath, NULL, 0.0, 0.0); // Add the Left and right rect CGPathAddRect(shadowPath, NULL, CGRectMake(0.0-rectWidth, 0.0, rectWidth, rectHeight)); CGPathAddRect(shadowPath, NULL, CGRectMake(self.frame.size.width, 0.0, rectWidth, rectHeight)); self.layer.shadowPath = shadowPath; CGPathRelease(shadowPath); // Since the default color of the shadow is black, we do not need to set it now //self.layer.shadowColor = [UIColor blackColor].CGColor; self.layer.shadowOffset = CGSizeMake(0, 0); // This is very important, the shadowRadius decides the feel of the shadow self.layer.shadowRadius = 10.0;}@end