Table View Cell Row Height doesnt work

问题

I have tried to hard code the row height in the table view cell. After running the program it looks like only one line. I suspect it is because of the height of the row of the table view.

Could you please tell me what went wrong in here?

回答1:

In Xcode 9, tableview automatically create estimated cells based on Autolayout. Since you have not provide autolayout, that's why you are getting this.

You need to disable estimated and automatic cell size by selecting tableview and uncheck the two options:

Give value you want to Row height, and cell will be created accordingly.

Hope this can help.

回答2:

Add this code in your UITableViewDelegate

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 100
}

回答3:

Set row height as well as estimated row height as Automatic in viewDidLoad() as

table.rowHeight = UITableViewAutomaticDimension
table.estimatedRowHeight = UITableViewAutomaticDimension

In heightForRowAt: set height as UITableViewAutomaticDimension as

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

Note: Set number of lines of label long restaurant name as 0.

回答4:

Ensure following steps to make, auto dimension effective for cell/row height layout. (Here is sample code for UILabel and how to set content specific height for table cell.)

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

@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.

回答5:

If you want the cells to occupy space according to its content, you need to return UITableViewAutomaticDimension in the table view delegate methods heightForRowAt: and estimatedHeightForRowAt:

回答6:

Following this guide which worked for me, you have to add a bunch of constraints and then the rowheight is calculated automatically.

In short, what I did: (adding and modifying constraints are the two rightmost buttons bottom right of the storyboard view)I at first selected all views in the prototype cell, deleted all constraints (there is a nice option on the rightmost button), then added all missing constraints (another nice option there) and last I chose the second button from the right and clicked all the red lines. You can do this while having all views selected at the same time. And then it worked.

回答7:

You can manually do it in your tableviewdelegate:

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 100
}

来源：https://stackoverflow.com/questions/46519567/table-view-cell-row-height-doesnt-work

标签

ios

swift

uitableview

row-height