UITableViewAutomatic Gap Restrictions?

Question

I am trying to use UITableViewAutomaticDimension , but it is difficult for me to get the full cell width and the correct height without causing problems with NSLayoutAutomaticSizeConstraint... If I turn off automatic size limits on a cell, this is not the full width.

I have two buttons with horizontal and vertical restrictions for representing content. They have a vertical limit between them, and each button has a height limit.

If you disable AutoResizingMask , I get a cell that is not full width. If I leave it, I get layout restrictions, but everything displays correctly.

How can I get the behavior I'm looking for?

 translatesAutoresizingMaskIntoConstraints) ( "<NSLayoutConstraint:0x7f856b169650 V:[UIButton:0x7f856b16a510'+(null)'(50)]>", "<NSLayoutConstraint:0x7f856b173dd0 UIButton:0x7f856b16a510'+(null)'.top == UITableViewCellContentView:0x7f856b16bfa0.topMargin>", "<NSLayoutConstraint:0x7f856b173e70 UITableViewCellContentView:0x7f856b16bfa0.bottomMargin == UITextField:0x7f856b16c4f0.bottom>", "<NSLayoutConstraint:0x7f856b174520 V:[UIButton:0x7f856b16a510'+(null)']-(8)-[UITextField:0x7f856b16c4f0]>", "<NSLayoutConstraint:0x7f856b182a10 'UIView-Encapsulated-Layout-Height' V:[UITableViewCellContentView:0x7f856b16bfa0(66)]>" ) Will attempt to recover by breaking constraint <NSLayoutConstraint:0x7f856b169650 V:[UIButton:0x7f856b16a510'+(null)'(50)]> 

It actually looks like this: the width is set

 - (CGSize)intrinsicContentSize { return CGSizeMake(320, 66); } 

If I do not set my own size for the content, I get no width or height.

Answer 1

edit: These are definitely two height restrictions. Try removing one or lowering the priority.

Answer 2

AutoresizingMask on = allows parents of this view to set appropriate masks.

AutoresizingMask off = Do not allow parents of this view to set appropriate masks. I want to do it myself.

If you create views in IB, their autoresizingMasks defaults to No.

If you create views in code, their auto-resistor masks are set to Yes by default.

The fact that you get a cell that is not full width (or, indeed, any behavior change) when you turn off AutoresizingMask means that the probability that the parent (in the view hierarchy) of the cell or table captures and sets restrictions (which is not what you want to).

Now the reason I think you get this cell not full width is caused by an annoying default in IB when you drag between view elements to set constraints, instead of binding constraints from above, from below, etc. IB connects him with the edge (different).

Therefore, you need to select your restrictions from the "Document Context":

And then select your border-bound constraints one by one:

And make sure the "Relative to field" option is not checked.

If you use the "Summary Constraints" tab in the lower right corner of IB (second from left), you can cancel the "Field Restriction" when creating restrictions:

Answer 3

I had a similar problem with this:

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

He threw me a journal about “failure to meet restrictions,” but there was no restriction in it, so I added an evaluation chart for HeightForRowAtIndexPath:

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

And he fixed