iOS 设置View投影
需要设置 颜色 阴影半径 等元素
UIView *shadowView = [[UIView alloc] init];shadowView.frame = CGRectMake(100, 100, 100, 100);shadowView.center = self.view.center;shadowView.backgroundColor = [UIColor whiteColor];//设置阴影颜色shadowView.layer.shadowColor = [UIColor colorWithRed:114.0/255.0 green:133.0/255.0 blue:152.0/255.0 alpha:1.0].CGColor;//设置阴影的透明度shadowView.layer.shadowOpacity = 0.1f;//设置阴影的偏移shadowView.layer.shadowOffset = CGSizeMake(30.0f, 10.0f);//设置阴影半径shadowView.layer.shadowRadius = 15.0f;//设置渲染内容被缓存shadowView.layer.shouldRasterize = YES;//超出父视图部分是否显示shadowView.layer.masksToBounds = NO;shadowView.layer.borderWidth = 0.0;shadowView.layer.opaque = 0.10;shadowView.layer.cornerRadius = 3.0;//栅格化处理shadowView.layer.rasterizationScale = [[UIScreen mainScreen]scale];//正常矩形UIBezierPath *path = [UIBezierPath bezierPathWithRect:shadowView.bounds];shadowView.layer.shadowPath = path.CGPath;[self.view addSubview:shadowView];
