iphone - Adding rounded corner and drop shadow to UICollectionViewCell

Iphone - Adding rounded corner and drop shadow to UICollectionViewCell

To add rounded corners and a drop shadow to a UICollectionViewCell in your iOS application, you can use the layer property of the cell's content view. Here's how you can do it:

  1. Rounded Corners: You can set the cornerRadius property of the cell's layer.
  2. Drop Shadow: You can configure the shadow properties such as shadowColor, shadowOpacity, shadowOffset, and shadowRadius.

Here's a complete example in Swift:

import UIKit class CustomCollectionViewCell: UICollectionViewCell { override init(frame: CGRect) { super.init(frame: frame) setupCell() } required init?(coder: NSCoder) { super.init(coder: coder) setupCell() } private func setupCell() { // Add rounded corners contentView.layer.cornerRadius = 10 contentView.layer.masksToBounds = true // Add shadow layer.shadowColor = UIColor.black.cgColor layer.shadowOpacity = 0.5 layer.shadowOffset = CGSize(width: 0, height: 2) layer.shadowRadius = 4 layer.masksToBounds = false } override func layoutSubviews() { super.layoutSubviews() // Ensure the shadow path is updated to match the cell's bounds layer.shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: contentView.layer.cornerRadius).cgPath } }

Steps Explained

  1. Rounded Corners:

    • contentView.layer.cornerRadius = 10: This sets the corner radius of the cell's content view to 10 points, giving it rounded corners.
    • contentView.layer.masksToBounds = true: This ensures that the content view's subviews are clipped to its rounded corners.

  2. Drop Shadow:

    • layer.shadowColor = UIColor.black.cgColor: Sets the shadow color to black.
    • layer.shadowOpacity = 0.5: Sets the shadow opacity to 50%.
    • layer.shadowOffset = CGSize(width: 0, height: 2): Sets the shadow offset, i.e., the position of the shadow relative to the cell.
    • layer.shadowRadius = 4: Sets the blur radius of the shadow.
    • layer.masksToBounds = false: Ensures the shadow is not clipped to the cell's bounds.

  3. Shadow Path:

    • In layoutSubviews(), the layer.shadowPath is updated to match the cell's bounds and corner radius, ensuring the shadow looks correct even when the cell is resized.

Usage

In your UICollectionView data source, register and dequeue this custom cell:

collectionView.register(CustomCollectionViewCell.self, forCellWithReuseIdentifier: "CustomCell") func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CustomCell", for: indexPath) as! CustomCollectionViewCell // Configure the cell as needed return cell }

This setup ensures that your UICollectionViewCell will have rounded corners and a drop shadow, enhancing the visual appearance of your collection view.

Examples

  1. iPhone UICollectionViewCell rounded corners and drop shadow

    • Description: Adding rounded corners and drop shadow to a UICollectionViewCell in iOS.
    • Code:
      // Swift cell.contentView.layer.cornerRadius = 10.0 cell.contentView.layer.borderWidth = 1.0 cell.contentView.layer.borderColor = UIColor.clear.cgColor cell.contentView.layer.masksToBounds = true cell.layer.shadowColor = UIColor.black.cgColor cell.layer.shadowOffset = CGSize(width: 0, height: 2.0) cell.layer.shadowRadius = 2.0 cell.layer.shadowOpacity = 0.5 cell.layer.masksToBounds = false cell.layer.shadowPath = UIBezierPath(roundedRect: cell.bounds, cornerRadius: cell.contentView.layer.cornerRadius).cgPath
    • Explanation: Sets cornerRadius, borderWidth, borderColor, and masksToBounds properties on cell.contentView to create rounded corners. Applies drop shadow using shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath properties on the cell's layer.

  2. Objective-C rounded corners and drop shadow on UICollectionViewCell

    • Description: Implementing rounded corners and drop shadow on a UICollectionViewCell in Objective-C.
    • Code:
      // Objective-C cell.contentView.layer.cornerRadius = 10.0; cell.contentView.layer.borderWidth = 1.0; cell.contentView.layer.borderColor = [UIColor clearColor].CGColor; cell.contentView.layer.masksToBounds = YES; cell.layer.shadowColor = [UIColor blackColor].CGColor; cell.layer.shadowOffset = CGSizeMake(0, 2.0); cell.layer.shadowRadius = 2.0; cell.layer.shadowOpacity = 0.5; cell.layer.masksToBounds = NO; cell.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds cornerRadius:cell.contentView.layer.cornerRadius].CGPath;
    • Explanation: Configures cornerRadius, borderWidth, borderColor, and masksToBounds for rounded corners. Sets up drop shadow with shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath.

  3. Swift 5 UICollectionViewCell rounded corners with shadow

    • Description: Implementing rounded corners and drop shadow for a UICollectionViewCell in Swift 5.
    • Code:
      // Swift 5 cell.contentView.layer.cornerRadius = 10.0 cell.contentView.layer.borderWidth = 1.0 cell.contentView.layer.borderColor = UIColor.clear.cgColor cell.contentView.layer.masksToBounds = true cell.layer.shadowColor = UIColor.black.cgColor cell.layer.shadowOffset = CGSize(width: 0, height: 2.0) cell.layer.shadowRadius = 2.0 cell.layer.shadowOpacity = 0.5 cell.layer.masksToBounds = false cell.layer.shadowPath = UIBezierPath(roundedRect: cell.bounds, cornerRadius: cell.contentView.layer.cornerRadius).cgPath
    • Explanation: Sets cornerRadius, borderWidth, borderColor, and masksToBounds on cell.contentView. Applies drop shadow using shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath on the cell's layer.

  4. Adding rounded corners to UICollectionViewCell Swift

    • Description: Applying rounded corners to a UICollectionViewCell in Swift.
    • Code:
      // Swift cell.contentView.layer.cornerRadius = 10.0 cell.contentView.layer.borderWidth = 1.0 cell.contentView.layer.borderColor = UIColor.clear.cgColor cell.contentView.layer.masksToBounds = true
    • Explanation: Sets cornerRadius, borderWidth, borderColor, and masksToBounds properties on cell.contentView to create rounded corners without drop shadow.

  5. Objective-C add rounded corners to UICollectionViewCell

    • Description: Adding rounded corners to a UICollectionViewCell in Objective-C.
    • Code:
      // Objective-C cell.contentView.layer.cornerRadius = 10.0; cell.contentView.layer.borderWidth = 1.0; cell.contentView.layer.borderColor = [UIColor clearColor].CGColor; cell.contentView.layer.masksToBounds = YES;
    • Explanation: Configures cornerRadius, borderWidth, borderColor, and masksToBounds properties on cell.contentView to achieve rounded corners.

  6. UICollectionViewCell drop shadow with rounded corners Swift

    • Description: Applying drop shadow with rounded corners to a UICollectionViewCell in Swift.
    • Code:
      // Swift cell.layer.shadowColor = UIColor.black.cgColor cell.layer.shadowOffset = CGSize(width: 0, height: 2.0) cell.layer.shadowRadius = 2.0 cell.layer.shadowOpacity = 0.5 cell.layer.masksToBounds = false cell.layer.shadowPath = UIBezierPath(roundedRect: cell.bounds, cornerRadius: cell.contentView.layer.cornerRadius).cgPath
    • Explanation: Sets up drop shadow with shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath properties on the cell's layer, utilizing rounded corners from cell.contentView.

  7. Add drop shadow to UICollectionViewCell Objective-C

    • Description: Adding drop shadow to a UICollectionViewCell in Objective-C.
    • Code:
      // Objective-C cell.layer.shadowColor = [UIColor blackColor].CGColor; cell.layer.shadowOffset = CGSizeMake(0, 2.0); cell.layer.shadowRadius = 2.0; cell.layer.shadowOpacity = 0.5; cell.layer.masksToBounds = NO; cell.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds cornerRadius:cell.contentView.layer.cornerRadius].CGPath;
    • Explanation: Configures drop shadow with shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath properties on the cell's layer, incorporating rounded corners from cell.contentView.

  8. UICollectionViewCell add border and drop shadow Swift

    • Description: Adding border and drop shadow to a UICollectionViewCell in Swift.
    • Code:
      // Swift cell.contentView.layer.cornerRadius = 10.0 cell.contentView.layer.borderWidth = 1.0 cell.contentView.layer.borderColor = UIColor.lightGray.cgColor cell.contentView.layer.masksToBounds = true cell.layer.shadowColor = UIColor.black.cgColor cell.layer.shadowOffset = CGSize(width: 0, height: 2.0) cell.layer.shadowRadius = 2.0 cell.layer.shadowOpacity = 0.5 cell.layer.masksToBounds = false cell.layer.shadowPath = UIBezierPath(roundedRect: cell.bounds, cornerRadius: cell.contentView.layer.cornerRadius).cgPath
    • Explanation: Sets cornerRadius, borderWidth, borderColor, and masksToBounds on cell.contentView. Applies drop shadow with shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath on the cell's layer.

  9. UICollectionViewCell add drop shadow only Swift

    • Description: Adding drop shadow only to a UICollectionViewCell in Swift.
    • Code:
      // Swift cell.layer.shadowColor = UIColor.black.cgColor cell.layer.shadowOffset = CGSize(width: 0, height: 2.0) cell.layer.shadowRadius = 2.0 cell.layer.shadowOpacity = 0.5 cell.layer.masksToBounds = false
    • Explanation: Sets drop shadow properties (shadowColor, shadowOffset, shadowRadius, shadowOpacity, and masksToBounds) on the cell's layer without configuring cornerRadius, borderWidth, or borderColor.

  10. Objective-C UICollectionViewCell rounded corners with shadow

    • Description: Implementing rounded corners and drop shadow to a UICollectionViewCell in Objective-C.
    • Code:
      // Objective-C cell.contentView.layer.cornerRadius = 10.0; cell.contentView.layer.borderWidth = 1.0; cell.contentView.layer.borderColor = [UIColor clearColor].CGColor; cell.contentView.layer.masksToBounds = YES; cell.layer.shadowColor = [UIColor blackColor].CGColor; cell.layer.shadowOffset = CGSizeMake(0, 2.0); cell.layer.shadowRadius = 2.0; cell.layer.shadowOpacity = 0.5; cell.layer.masksToBounds = NO; cell.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds cornerRadius:cell.contentView.layer.cornerRadius].CGPath;
    • Explanation: Configures cornerRadius, borderWidth, borderColor, and masksToBounds for rounded corners on cell.contentView. Applies drop shadow with shadowColor, shadowOffset, shadowRadius, shadowOpacity, and shadowPath on the cell's layer.

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