UIView 阴影和圆角

Question

I have a UIView which I want to have a shadow and round corners. The problem is - a shadow requires masksToBounds = NO while round corners requires masksToBounds = YES .

The solution I found is to have a container which will have shadow and add my UIView as a subview of the container - and give it rounded corners.

This works. I have both shadow AND round corners - but it's no good. The shadow is of a rectangle view and my image has rounded corners.

How can I implement a shadow for the rounded corners?

Answer 1

import UIKit

@IBDesignable
class customButton: UIView {

    @IBInspectable var cornerRadius:CGFloat = 0{
        didSet{
            self.layer.cornerRadius = cornerRadius
        }
    }

    @IBInspectable var borderWidth:CGFloat = 0{
        didSet{
            self.layer.borderWidth = borderWidth
        }
    }

    @IBInspectable var borderColor:UIColor = UIColor.white{
        didSet{
            self.layer.borderColor = borderColor.cgColor
        }
    }


}

Set this as class for the UIView and put maskToBound = true . Then in the inspector set the value accordingly to get a rounded shadow.

Answer 2

Remove the container, its clipping your view shadow. Import QuartzCore/QuartzCore.h . And try this code to your view

#import < QuartzCore/QuartzCore.h>

...

view.layer.cornerRadius = 5.0f;
[view.layer setShadowColor:[UIColor redColor].CGColor];
[view.layer setShadowOpacity:0.7];
[view.layer setShadowRadius:5.0];
[view.layer setShadowOffset:CGSizeMake(2.0, 2.0)];

to know more about maskToBound see this link

What UIView layer.masksToBounds is doing if set to YES?

Answer 3

// border radius
[yourView.layer setCornerRadius:30.0f];

// border
[yourView.layer setBorderColor:[UIColor blackColor].CGColor];
[yourView.layer setBorderWidth:1.5f];
 yourView.layer.masksToBounds=YES;

// drop shadow
[yourView.layer setShadowColor:[UIColor lightGrayColor].CGColor];
[yourView.layer setShadowOpacity:0.8];
[yourView.layer setShadowRadius:3.0];
[yourView.layer setShadowOffset:CGSizeMake(2.0, 2.0)];

This may help you.