iOS TableView Constraints doesn’t work

Question

Hi. I’m already tried to find some info about it at Goodle, but nothing could help me.
I’m swift beginner. Help me, please.

I want to auto layout this TableViewCell in TableViewController.

Now it’s look fine in IB, Preview and Simulator, but only on this screen size, sure.

Then I added by 5 constrains, as I saw at one StackOverflow answer, to each of subview of Cell like this:

and now, when I run project is look crashed:

WHY ?

instead of adding constraint on subviews , add UIView as container view and add subviews in it and apply suggested constraint on it.On last add constraint on UIView — Muhammad Shauket, Oct 30 '17 at 10:27

score 2 · Accepted Answer · answered Oct 30 '17 at 11:44

You can use UIStackView for such kind of nested views. It just reduces the number of constraints required to be applied by the developer.

Example:

1. UITableViewDataSource

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
    return 2
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
    return tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
}

2. Storyboard: View Hierarchy and Constraints:

3. Output:

I haven't used the height/estimatedHeight UITableViewDelegate methods. It will be automatically calculated by the cell (if the constraints are right and the cell is able to calculate its own height).

Interesting solution! Thanks! – igolka97 Oct 30 '17 at 15:05 — igolka97, Oct 30 '17 at 15:05
Sure..accept the answer if it worked.. – PGDev Oct 30 '17 at 17:05 — PGDev, Oct 30 '17 at 17:05

score -1 · Answer 2 · answered Oct 30 '17 at 10:11

If you added these 5 constraints to each subview of your cell, then it's incorrect. Moreover, contentView is also a subview of the cell and you're modifying its width - thus showing a reduced width. Plus, each of the subviews (that shouldn't include the contentView) should have different constraints.

You can also let Xcode determine estimate the height of the cell automatically based on your constraints using UITableViewAutomaticDimension.

iOS TableView Constraints doesn’t work

2 Answers2

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