Adjust UILabel Dynamically Within UITableViewCell?

问题

I would like to adjust the number of lines in a UILabel dynamically. For example, there could be a long string or a short string. If there are less than 10 characters, there should be one line. If there are 10-20 characters, it should be two lines. This UILabel is inside of a UITableViewCell. Currently, if there is a long string, then the UILabel just shows "..." wherever it runs out of space, so the string is cut off. How can I prevent this from happening?

回答1:

Try:

nameOfLabel.numberOfLines = 0

0 is supposed to be dynamic.

回答2:

Constaints from Top Left Right Buttom of label and label.numberOfLine = 0 make it dynamically resizable according to dynamic content.

回答3:

First set numberOfLines to 0 for that UILabel from Storyboard

Than set estimated height for your UITableView

self.tableView.rowHeight = UITableViewAutomaticDimension
self.tableView.estimatedRowHeight = 108.0

Than Add heightForRowAt method

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

Hope it Help!

回答4:

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
    table.rowHeight = UITableViewAutomaticDimension
    table.estimatedRowHeight = UITableViewAutomaticDimension
}



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

回答5:

You need to give constraints to tableview cell's label leading, trailing, top and bottom like below...

Also set label's number of lines to zero and line breaking mode to word wrap.

And in your main view controller just add this line...

self.tableView.estimatedRowHeight = UITableViewAutomaticDimension

The above line automatically calculates the cell height as per its content.

来源：https://stackoverflow.com/questions/48981992/adjust-uilabel-dynamically-within-uitableviewcell

标签

ios

swift

uitableview

uilabel