CODEWITHSUNDEEP
iosswiftuitableview
ZeroChow
ZeroChow

Reputation: 442

Override init in subclassed UITableViewCell

I want to ovrride init(frame: CGRect) in a subclassed UITableViewCell.

override init(frame: CGRect) {
   super.init(frame: CGRect)
}

But this throws an error: Initializer does not ovrride a designated initializer from its super class, I did something wrong?

Upvotes: 11

Views: 19000

Answers (6)

Tziki
Tziki

Reputation: 330

These are the init functions you need to override in your child [UITableView][1]

override init(frame: CGRect, style: UITableView.Style) {
    //When you manually initializing a table
    super.init(frame: frame, style: style)
}

required init?(coder: NSCoder) {
    //From xib or storyboard
    super.init(coder: coder)
}

Upvotes: 0

Sandu
Sandu

Reputation: 516

Case 1: if you need to directly change the height of the cell,you can use

func tableView(_ tableView: UITableView, heightForRowAt indexPath:IndexPath) -> CGFloat {
    return 50
  }

Case 2: If you need to subclass a cell,go to that cell class and override the reuseidentifier

override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
 let hrt = heightAnchor.constraint(equalToConstant: 50)
    hrt.isActive = true
 }

Upvotes: 0

Changnam Hong
Changnam Hong

Reputation: 1679

If you really want to use init(frame: CGRect), use UICollectionViewCell. And set the size of your cell with CGSize(width: view.frame.width, height: 100). For example,

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: view.frame.width, height: 100)
}

It looks like tableViewCell and you also can use init(frame: CGRect).

Upvotes: 0

konrad.bajtyngier
konrad.bajtyngier

Reputation: 1786

For an UITableViewCell, you should be overriding this one:

override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)
}

See documentation.

If you would like to be able to vary cells' frame, you should look into delegate methods like:

  • tableView(_:heightForRowAtIndexPath:) for row height
  • tableView(_:indentationLevelForRowAtIndexPath:) for row indent

See documentation for UITableViewDelegate.

Upvotes: 16

farzadshbfn
farzadshbfn

Reputation: 2748

Yes, UITableViewCell has only two initializers

public init(style: UITableViewCellStyle, reuseIdentifier: String?)
public init?(coder aDecoder: NSCoder)

Upvotes: 0

Max
Max

Reputation: 1163

init(frame: CGRect) is not an initializer of the superclass UITableViewCell. You need to override init(coder: aDecoder) or init(style: UITableViewCellStyle, reuseIdentifier: String?)

Upvotes: 0

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