How to Mask Views Inside UICollectionView Cell Without Cutting Off Shadows












0















My goal is to get the views that show up when the cell is tapped to be hidden under the bounds of the cell as it expands, and show up as the cell expands, without cutting off the shadow of the cell. The views that show up outside of the cell include the labels for the class (Calculus 3 and Econ 101), the notes field, and the gray line.



override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if weekTasks[indexPath.section].count == 0 {
let emptyCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emptyCellID", for: indexPath) as! EmptyCell
return emptyCell
} else {
let assignmentCell = collectionView.dequeueReusableCell(withReuseIdentifier: "assignCellID", for: indexPath) as! AssignmentCell
assignmentCell.myAssignment = weekTasks[indexPath.section][indexPath.item]
assignmentCell.contentView.backgroundColor = UIColor.clear
assignmentCell.layer.shadowOffset = CGSize(width: 0 ,height: 1)
assignmentCell.layer.shadowRadius = 4
return assignmentCell
}
}

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

do {
let cell = collectionView.cellForItem(at: indexPath)
cell?.backgroundColor = UIColor.white
cell?.layer.cornerRadius = 12
let animation = CABasicAnimation(keyPath: "shadowOpacity")
animation.fromValue = 0
animation.toValue = 0.2
animation.duration = 0.3
cell?.layer.add(animation, forKey: animation.keyPath)
cell?.layer.shadowOpacity = 0.2
}

collectionView.performBatchUpdates(nil, completion: nil)
}


The following is inside my collection view cell class:



override var isSelected: Bool {
didSet{
if self.isSelected
{
self.addSubview(notesField)
notesField.frame = CGRect(x: 50, y: 38, width: screenWidth - 60, height: 30)

self.addSubview(seperator)
seperator.frame = CGRect(x: 24, y: 71, width: self.frame.width - 48, height: 0.5)

self.addSubview(classButton)
classButton.frame = CGRect(x: 10, y: 80, width: 60, height: 20)
}
}
}


The response I get.










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    0















    My goal is to get the views that show up when the cell is tapped to be hidden under the bounds of the cell as it expands, and show up as the cell expands, without cutting off the shadow of the cell. The views that show up outside of the cell include the labels for the class (Calculus 3 and Econ 101), the notes field, and the gray line.



    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    if weekTasks[indexPath.section].count == 0 {
    let emptyCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emptyCellID", for: indexPath) as! EmptyCell
    return emptyCell
    } else {
    let assignmentCell = collectionView.dequeueReusableCell(withReuseIdentifier: "assignCellID", for: indexPath) as! AssignmentCell
    assignmentCell.myAssignment = weekTasks[indexPath.section][indexPath.item]
    assignmentCell.contentView.backgroundColor = UIColor.clear
    assignmentCell.layer.shadowOffset = CGSize(width: 0 ,height: 1)
    assignmentCell.layer.shadowRadius = 4
    return assignmentCell
    }
    }

    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    do {
    let cell = collectionView.cellForItem(at: indexPath)
    cell?.backgroundColor = UIColor.white
    cell?.layer.cornerRadius = 12
    let animation = CABasicAnimation(keyPath: "shadowOpacity")
    animation.fromValue = 0
    animation.toValue = 0.2
    animation.duration = 0.3
    cell?.layer.add(animation, forKey: animation.keyPath)
    cell?.layer.shadowOpacity = 0.2
    }

    collectionView.performBatchUpdates(nil, completion: nil)
    }


    The following is inside my collection view cell class:



    override var isSelected: Bool {
    didSet{
    if self.isSelected
    {
    self.addSubview(notesField)
    notesField.frame = CGRect(x: 50, y: 38, width: screenWidth - 60, height: 30)

    self.addSubview(seperator)
    seperator.frame = CGRect(x: 24, y: 71, width: self.frame.width - 48, height: 0.5)

    self.addSubview(classButton)
    classButton.frame = CGRect(x: 10, y: 80, width: 60, height: 20)
    }
    }
    }


    The response I get.










    share|improve this question

























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      My goal is to get the views that show up when the cell is tapped to be hidden under the bounds of the cell as it expands, and show up as the cell expands, without cutting off the shadow of the cell. The views that show up outside of the cell include the labels for the class (Calculus 3 and Econ 101), the notes field, and the gray line.



      override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
      if weekTasks[indexPath.section].count == 0 {
      let emptyCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emptyCellID", for: indexPath) as! EmptyCell
      return emptyCell
      } else {
      let assignmentCell = collectionView.dequeueReusableCell(withReuseIdentifier: "assignCellID", for: indexPath) as! AssignmentCell
      assignmentCell.myAssignment = weekTasks[indexPath.section][indexPath.item]
      assignmentCell.contentView.backgroundColor = UIColor.clear
      assignmentCell.layer.shadowOffset = CGSize(width: 0 ,height: 1)
      assignmentCell.layer.shadowRadius = 4
      return assignmentCell
      }
      }

      override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

      do {
      let cell = collectionView.cellForItem(at: indexPath)
      cell?.backgroundColor = UIColor.white
      cell?.layer.cornerRadius = 12
      let animation = CABasicAnimation(keyPath: "shadowOpacity")
      animation.fromValue = 0
      animation.toValue = 0.2
      animation.duration = 0.3
      cell?.layer.add(animation, forKey: animation.keyPath)
      cell?.layer.shadowOpacity = 0.2
      }

      collectionView.performBatchUpdates(nil, completion: nil)
      }


      The following is inside my collection view cell class:



      override var isSelected: Bool {
      didSet{
      if self.isSelected
      {
      self.addSubview(notesField)
      notesField.frame = CGRect(x: 50, y: 38, width: screenWidth - 60, height: 30)

      self.addSubview(seperator)
      seperator.frame = CGRect(x: 24, y: 71, width: self.frame.width - 48, height: 0.5)

      self.addSubview(classButton)
      classButton.frame = CGRect(x: 10, y: 80, width: 60, height: 20)
      }
      }
      }


      The response I get.










      share|improve this question














      My goal is to get the views that show up when the cell is tapped to be hidden under the bounds of the cell as it expands, and show up as the cell expands, without cutting off the shadow of the cell. The views that show up outside of the cell include the labels for the class (Calculus 3 and Econ 101), the notes field, and the gray line.



      override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
      if weekTasks[indexPath.section].count == 0 {
      let emptyCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emptyCellID", for: indexPath) as! EmptyCell
      return emptyCell
      } else {
      let assignmentCell = collectionView.dequeueReusableCell(withReuseIdentifier: "assignCellID", for: indexPath) as! AssignmentCell
      assignmentCell.myAssignment = weekTasks[indexPath.section][indexPath.item]
      assignmentCell.contentView.backgroundColor = UIColor.clear
      assignmentCell.layer.shadowOffset = CGSize(width: 0 ,height: 1)
      assignmentCell.layer.shadowRadius = 4
      return assignmentCell
      }
      }

      override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

      do {
      let cell = collectionView.cellForItem(at: indexPath)
      cell?.backgroundColor = UIColor.white
      cell?.layer.cornerRadius = 12
      let animation = CABasicAnimation(keyPath: "shadowOpacity")
      animation.fromValue = 0
      animation.toValue = 0.2
      animation.duration = 0.3
      cell?.layer.add(animation, forKey: animation.keyPath)
      cell?.layer.shadowOpacity = 0.2
      }

      collectionView.performBatchUpdates(nil, completion: nil)
      }


      The following is inside my collection view cell class:



      override var isSelected: Bool {
      didSet{
      if self.isSelected
      {
      self.addSubview(notesField)
      notesField.frame = CGRect(x: 50, y: 38, width: screenWidth - 60, height: 30)

      self.addSubview(seperator)
      seperator.frame = CGRect(x: 24, y: 71, width: self.frame.width - 48, height: 0.5)

      self.addSubview(classButton)
      classButton.frame = CGRect(x: 10, y: 80, width: 60, height: 20)
      }
      }
      }


      The response I get.







      swift uicollectionview uicollectionviewcell clipstobounds






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      asked Nov 20 '18 at 4:34









      Carter FoughtyCarter Foughty

      135




      135
























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