如何使LineBreakMode在UITableViewCell中工作？ iOS-Swift

Question

I have a header and a body inside my tableviewcells. I'm trying to get the body to wrap but I'm having issues.

This is the code I'm using in my view controller

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.delegate = self
    tableView.dataSource = self

}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    if let cell = tableView.dequeueReusableCellWithIdentifier("mainCell") as? mainCell {

        cell.mainHeader.text = (mainHeader[indexPath.row])
        cell.mainBody.text = (mainBody[indexPath.row])
        cell.mainBody.numberOfLines = 0
        cell.mainBody.lineBreakMode = NSLineBreakMode.ByWordWrapping


        return cell

    } else {

        return mainCell()
    }

}    

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return mainHeader.count
}


}

I searched and thought that the numberOfLines = 0 and lineBreakMode = NSLineBreakMode would work but it's obviously not.

Sorry if this is simple, thanks in advance.

@Daven

I know this probably won't help, but I don't think I have that or if I do I'm unsure of what it is. Also updated original code with everything that is in my VC but the vars

I have this for my custom cell

import UIKit

class mainCell: UITableViewCell {

@IBOutlet weak var mainHeader: UILabel!
@IBOutlet weak var mainBody: UILabel!


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

func configureCell (text:String) {
    mainHeader.text = text
    mainBody.text = text

}


}

Answer 1

Assuming you want your cell to expand when the text is longer than one line, you want to set the cell height to be automatic using the delegate function:

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

and set the estimated row height using

func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return currentInfoSelectorOption.rowHeight + 100
}

Then use autolayout in your cell to set the height. You can do this by setting the top and bottom distance constraints of the cell to the label as a constant value and setting the labels number of lines to 0. This should allow the label to expand and push the cell with it

Answer 2

To make your cell expand as its label grows, you'll need to make sure you've done a few things. Set your tableView 's estimatedRowHeight to a value, like

tableView.estimatedRowHeight = 200.0;
tableView.rowHeight = UITableViewAutomaticDimension

or via this method:

func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return 200.00
}

You also have the option of using this method, but it's not necessary if all your cells are going to vary in height:

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

You may also find this tutorial helpful (this is what I used :)). It shows what your autolayout constraints should look like. More information about self-sizing cells is also here .