前言
圆角和阴影是开发中用的比较多的属性，现在几乎所有的APP都会使用这两个属性。但是在设置圆角的时候如果layer.masksToBounds = YES；那么再设置阴影就无效了。本文主要讨论下如何让二者并存。
1. 设置masksToBounds为NO
- (void)normalShadow {
UIView *sv = [UIView new];
sv.frame = CGRectMake(100, 100, 200, 200);
sv.backgroundColor = [UIColor whiteColor];
sv.layer.cornerRadius = 5;
sv.layer.masksToBounds = NO;
sv.layer.shadowColor = [UIColor lightGrayColor].CGColor;
sv.layer.shadowOffset = CGSizeMake(0, 0);
sv.layer.shadowOpacity = 0.8;
sv.layer.shadowRadius = 8;
[self.view addSubview:sv];
}
2.加入一个view用来显示阴影
- (void)shadow {
UIView *v1 = [UIView new];
v1.frame = CGRectMake(0, 0, 200, 200);
v1.backgroundColor = [UIColor whiteColor];
v1.layer.cornerRadius = 5;
v1.layer.masksToBounds = YES;
UIView *v2 = [UIView new];
v2.layer.shadowColor = [UIColor lightGrayColor].CGColor;
v2.layer.shadowOffset = CGSizeMake(0, 0);
v2.layer.shadowOpacity = 0.8;
v2.layer.shadowRadius = 8;
v2.frame = CGRectMake(100, 100, 200, 200);
[v2 addSubview:v1];
[self.view addSubview:v2];
}
3.加入一个layer用来显示阴影
- (void)LayerShadow {
CALayer *shadowLayer = [CALayer layer];
shadowLayer.shadowColor = [UIColor blackColor].CGColor;
shadowLayer.shadowOffset = CGSizeMake(0, 0);
shadowLayer.shadowOpacity = 1;
shadowLayer.shadowRadius = 10;
shadowLayer.frame = CGRectMake(100, 100, 200, 200);
UIView *sv = [UIView new];
sv.frame = CGRectMake(0, 0, 200, 200);
sv.backgroundColor = [UIColor whiteColor];
sv.layer.cornerRadius = 5;
sv.layer.masksToBounds = YES;
[self.view.layer addSublayer:shadowLayer];
[shadowLayer addSublayer:sv.layer];
}
以上方法都可以实现圆角和阴影共存，具体使用哪种就要看自己的需求了。
