In my code I have a stack view that initially has 1 element PhoneNumberField. Another PhoneNumberFieldscan be added dynamically in the runtime:
#IBAction func addAlternatePhoneNumberAction(_ sender: UIButton) {
let alternateNumberView = PhoneNumberField()
...
phoneNumberStackView.addArrangedSubview(alternateNumberView)
}
This is what xib for PhoneNumberFieldlooks like:
The problem is that I would like to be able to dynamically hide the 'Name for other phone' field based on the content of 'Mobile combobox'. When I set the 'isHidden' parameter everything works as expected, the only problem is that the PhoneNumberField height stays the same. I would like it to shrink when the 'Name for other phone' field is hidden.
I tried doing it using the outlet for height constant for otherNumberNameField in the PhoneNumberField.swift file but the problem is that in that case all of the PhoneNumberFields in the stack view have the size of the first field.
What would be the correct solution for this?
edit: In addition to the answer below: I had to set the distribution for the phoneNumberStackView to equal spacing. Worked like a charm.
First, create StackView.
Don't set its height constraint, just set top, leading, trailing and bottom constraints.
Bottom constraint set equal to Error label top constraint.
Then set its distribution to Fill Equally.
Now put first two Views into one view and put this view together with OtherNumberField view to this StackView.
So now your hierarchy should look like this:
Now when you hide one view from StackView, StackView will be smaller because you didn't set its height.
My question is :
Why when I build and run the Table View created with different rows don't bounce, although I selected the checkbox Bounces and Bounce Vertically in Xcode 6 ?
By default UIScrollView, which is a superclass of UITableView won't bounce if the content fits within its bounds i.e. if the rows fit within table's bounds.
To alter this behaviour you can set alwaysBounceVertical property to true.
var alwaysBounceVertical: Bool { get set }
If this property is set to true and bounces is true, vertical dragging
is allowed even if the content is smaller than the bounds of the
scroll view. The default value is false.
Try this code:
[eventTable setBounces:NO];
(OR)In Storyboard untick the Bounces.
I want to display a list of product descriptions inside collection view cells and I'm using dequee for that.
I want to make sure that it only scrolls horizontally and not vertically at all.
The cell's width is 180px and the total number of my items is different every time.
I have tried a lot but the scrollView doesn't extend it's width at all.
You should specify the layoutDirection property of your collection in viewDidLoad:
if let flow = collectionView?.collectionViewLayout as? UICollectionViewFlowLayout{
flow.scrollDirection = .Horizontal
}
or you can do this in Storyboard.
For swift 5 and easy way to do it. Use auto layout
I have an iPhone app in which I'm using a UITableView to format a set of text responses, one per row. I've set up the cell in the storyboard to have a label inside it, and set up a constraint saying that the label should be 10 points from the edge of the cell. I then set up a custom subclass of UITableViewCell, set the cell in the storyboard to be of that class, and connected the outlet.
However, when I load the table, I see the text in the cell moving slightly to the right under some circumstances: when I select the cell, or when I load additional cells into the table. In fact, in the latter case, sometimes everything gets shifted to the right, even cells which were already there!
What the heck is going on here? The only changes I'm making in tableView:cellForRowAtIndexPath: are to the text in the label, and I'm always setting it. And I've unset "Indent While Editing" on the cell in the storyboard.
Answering some of the questions: I'm setting the view up using the storyboard. Xcode isn't reporting any ambiguity with the constraints. Also, here are the screenshots, before and after:
My guess is that the constraints for the label are ambiguous. Ambiguity can make UI components jump around for inexplicable reasons. You probably need to set more constraints for the label to define its position on both axes.
Or, maybe all you need to do is set the label to the "size that fits content" (intrinsic content size) under the Editor menu in IB.
Did you add a new label to the UITableViewCell, or are you working with the textLabel that already exists in it? If you added a new one, consider removing it and using the cell's existing textLabel property instead. If that's not an option for some reason, double-check that the label you've added is in the contentView of the cell, and that all the constraints are relative to the parent view, not to the cell itself.
Also, for debugging, you could set the cell's contentView background color to red (cell.contentView.backgroundColor = [UIColor redColor];) - this might give you a better sense of what's moving, the label or the whole view.
This is just a guess without seeing your code. I had a similar problem once, when the app reused an existing cell, the dimensions of the label were not correct. So, I had to remove the old label in my cellForRowAtIndexPath method, before adding a new label. Here's how I removed the old one:
UIView *oldLabel = [cell viewWithTag:3];
if (oldLabel != nil)
{
[oldLabel removeFromSuperview];
}
Then I added a new label like this:
[cell.contentView addSubview:newLabelOrWhatever];
It might be worth checking to see that your string content doesn't have a space prefixed on it. Also, you could verify the actual position of the label by setting the background color.
I had a similar issue when the label would move when the cell was selected. It was a custom cell that I was loading from a custom Nib.
In the Nib I had not set the backgroundView of the UITableViewCell (superclass) to any view. Once I set it (I set it to the ContentView) the issue stopped.
My auto-layout constrains seems fine and had no issues, so I'm assuming it was the above that fixed it.
If you have a custom subclass of UITableViewCell, try implementing layoutSubviews. Let me try from the top of my head:
static CGFloat const kLeftMargin = 10.0f;
- (void) layoutSubviews
{
[super layoutSubviews];
/* Prepare for processing */
CGSize cellSize = self.bounds.size;
/* Change the textLabel frame */
{
/* Compute the new label frame */
CGSize labelSize = self.textLabel.bounds.size;
CGFloat xCoor = kLeftMargin;
CGFloat yCoor = roundf((cellSize.height - labelSize.height) / 2.0f);
CGRect labelFrame = CGRectMake(xCoor, yCoor,
labelSize.width, labelSize.height);
/* Set the new label frame */
self.textLabel.frame = labelFrame;
}
}
Now, this isn't what is usually recommended (since a lot of people use Storyboards and NIBs), but from experience, if you want some correct layouting done, implement layoutSubviews.
I am working on a simple storyboard prototype. My TableViewController uses Dynamic Prototype as Content.
I have a cell with 4 label of which two will be set in code (the label text). The height of the cell will be calculated in code too. The Line Breaks are set to Word Wrap and everything's working fine with the default values (System 17.0):
see here:
..but if I change the Font Size of the "Fantasy Street..." label it will not break any more instead it just will be cut off!
see here: with System Font 16
Lines are set to 0
Word Wrap is still active
.. I also tried to do it manually in code but no change.
Does anyone have an explanation for that?
****edited:** when I add
myLabel.frame = CGRectMake(t.origin.x, t.origin.y, t.size.width, t.size.height *2);
to the cellForRowAtIndexPath I still see the cut off label. But if I then scroll the table view so the label is outside the viewable area shortly it will be displayed with the complete text when it is visible again.
By the way, I am working with viewTags, so I don't have a dedicated Cell Class e.g. UILabel *myLabel = (UILabel *)[cell viewWithTag:2];
You should check UILabel width; the width should be less than that of the value. Then like this:
(void) viewWillLayoutSubviews {
_landPhoneTips.preferredMaxLayoutWidth = _landPhoneTips.bounds.size.width;
}
I spent hours dealing with this identical problem before finally sorting it out last evening. After changing the font size, you must select the UILabel within the storyboard and select Edit > Size to Fit Content, even if you had already previously done so! In doing so you apparently reset some setting that gets messed up when changing the font size. Once done, the UILabel will wrap as it did previously.