Dynamically increase height of UILabel & TableView Cell?

Question

I have a UITableView in which i am displaying a custom cell.I my cell i have two label & one view as below in picture.

I have given constraint of left v

Answer 1

Give your label constraint as top to Cell , Bottom to cell and keep your Leading and trailing constraint as it is. In

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
   return UITableViewAutomaticDimension;
}

-(CGFloat)tableView:(UITableView *)tableView
    estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return UITableViewAutomaticDimension;
}

by using UITableViewAutomaticDimension will grow your tableview cell height according to your label's content and most important point is , select your label then go to Identity Inspector and in number of lines , write 0

Answer 2

To set automatic dimension for row height & estimated row height, ensure following steps to make, auto dimension effective for cell/row height layout.

• Assign and implement tableview dataSource and delegate
• Assign UITableViewAutomaticDimension to rowHeight & estimatedRowHeight
• Implement delegate/dataSource methods (i.e. heightForRowAt and return a value UITableViewAutomaticDimension to it)

-

Objective C:

// in ViewController.h
#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>

  @property IBOutlet UITableView * table;

@end

// in ViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];
    self.table.dataSource = self;
    self.table.delegate = self;

    self.table.rowHeight = UITableViewAutomaticDimension;
    self.table.estimatedRowHeight = UITableViewAutomaticDimension;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

    return UITableViewAutomaticDimension;
}

Swift:

@IBOutlet weak var table: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Don't forget to set dataSource and delegate for table
    table.dataSource = self
    table.delegate = self

   // Set automatic dimensions for row height
    // Swift 4.2 onwards
    table.rowHeight = UITableView.automaticDimension
    table.estimatedRowHeight = UITableView.automaticDimension


    // Swift 4.1 and below
    table.rowHeight = UITableViewAutomaticDimension
    table.estimatedRowHeight = UITableViewAutomaticDimension

}



// UITableViewAutomaticDimension calculates height of label contents/text
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    // Swift 4.2 onwards
    return UITableView.automaticDimension

    // Swift 4.1 and below
    return UITableViewAutomaticDimension
}

For label instance in UITableviewCell

• Set number of lines = 0 (& line break mode = truncate tail)
• Set all constraints (top, bottom, right left) with respect to its superview/ cell container.
• Optional: Set minimum height for label, if you want minimum vertical area covered by label, even if there is no data.

Note: If you've more than one labels (UIElements) with dynamic length, which should be adjusted according to its content size: Adjust 'Content Hugging and Compression Resistance Priority` for labels which you want to expand/compress with higher priority.

Answer 3

This is how I worked out.

1) Set no. of lines to 0.

2) Set LineBreakage.

3) Add Constraints.

4) Change vertical content hugging priority.

5) On ViewDidLoad:

override func viewDidLoad() {
    super.viewDidLoad()

    self.sampleTableView.estimatedRowHeight = 600.0;
    self.sampleTableView.rowHeight = UITableViewAutomaticDimension;

    self.sampleTableView.setNeedsLayout()
    self.sampleTableView.layoutIfNeeded()
}

6) On TableView Custom Cell:

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

    sizeToFit()
    layoutIfNeeded()
}

Answer 4

First of all you should not calculate height manually in auto layout environment. Just set both labels TopSpace and BottomSpace to cell's contentView and make sure you set both labels NumberOfLines to 0 and LineBreakMode to WordWrap.

And the other constraint are as below,

ItemLabel:

SeparatorView:

DescriptionLabel:

And add the delegates for height as below,

#pragma mark - UITableView Delegates
-(CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {

    return 44.0;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

    return UITableViewAutomaticDimension;
}

You should get the output as below,

Hope this would help you.

Answer 5

Swift 3 / Swift 4

Custom cell:

class CustomCell: UITableViewCell {

    @IBOutlet var messageLabel: UILabel!

    override func awakeFromNib() {
        super.awakeFromNib()

        sizeToFit()
        layoutIfNeeded()

    }

}

viewDidLoad:

override func viewDidLoad() {
    super.viewDidLoad()        

    self.tableView.estimatedRowHeight = 80
    self.tableView.rowHeight = UITableViewAutomaticDimension

}

And cellForRowAtIndexPath:

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

     let cell : CustomCell = tableView.dequeueReusableCell(withIdentifier: "yourcellIdentifier", for: indexPath) as! CustomCell
     cell.messageLabel.text = exampleContent[indexPath.row]
     cell.messageLabel.sizeToFit()
     cell.messageLabel.layoutIfNeeded()
     return cell

}

Answer 6

You need to define maximum estimated Height when view is loading

tblObject.estimatedRowHeight = 300;
tblObject.rowHeight = UITableViewAutomaticDimension;