前提
圆角和阴影无法共存的原因就是因为这句代码。
Because shadow is an effect done outside the View, and that masksToBounds set to YES will tell the UIView not to draw everything that is outside itself.
这句话的意思就是,圆角都是我给你割出来的,圆角外面的阴影自然也割掉了~ 所以,这么看来,圆角与阴影不能并存啊(仅限这种圆角实现的方式)
处理方式
- 在下面再加一个subView负责处理圆角,而父类view处理阴影
父类View:
NSInteger standard = 1;
parentView.layer.cornerRadius = 10*standard;
parentView.layer.shadowColor = [UIColor darkGrayColor].CGColor;
// 设置阴影偏移量
parentView.layer.shadowOffset = CGSizeMake(3*standard,3*standard);
// 设置阴影透明度
parentView.layer.shadowOpacity = 1;
// 设置阴影半径
parentView.layer.shadowRadius = 3* standard;
parentView.layer.masksToBounds = NO;
subView:
NSInteger standard = 1;
subView.layer.cornerRadius = 10*standard;
subView.layer.masksToBounds = YES;
注意父类View的masksToBounds=NO cornerRadius等于subView的大小 suvBiew的masksToBounds=YES
- 添加一个上层Layer:
CALayer *subLayer=[CALayer layer];
CGRect fixframe = _tableView.frame;
subLayer.frame= fixframe;
subLayer.cornerRadius=8;
subLayer.backgroundColor=[[UIColor blackColor] colorWithAlphaComponent:0.8].CGColor;
subLayer.masksToBounds=NO;
subLayer.shadowColor = [UIColor blackColor].CGColor;//shadowColor阴影颜色
subLayer.shadowOffset = CGSizeMake(3,2);//shadowOffset阴影偏移,x向右偏移3,y向下偏移2,默认(0, -3),这个跟shadowRadius配合使用
subLayer.shadowOpacity = 0.8;//阴影透明度,默认0
subLayer.shadowRadius = 4;//阴影半径,默认3
[self.bkgView.layer insertSublayer:subLayer below:_tableView.layer];
- (void)drawRect:(CGRect)rect {
CGContextRef ref = UIGraphicsGetCurrentContext();
CGContextMoveToPoint(ref, self.bounds.origin.x+10, 0); // 起点
CGContextAddLineToPoint(ref, self.bounds.origin.x, 10); // 连线
CGContextAddLineToPoint(ref, 20, 10); // 连线
CGContextClosePath(ref); // 闭拢
[THEME_COLOR setFill];// 背景填充颜色
[THEME_COLOR setStroke]; // 连线颜色 即边框颜色
CGContextDrawPath(ref, kCGPathFillStroke);
}
参考
https://blog.csdn.net/feosun/article/details/86657330
https://www.jianshu.com/p/0be78fc8022d