i have UILabel (red colored) on top and UIScrollView (blue colored) at the bottom of it. I have set all constraints for UILabel and at the same time I have set UIScrollView Top Space To: UILabel = 10.
Now when my app is loaded everything looks good. But, i am dynamically changing height of my UILabel depending on its text and logically when height of UILabel increases UIScrollView should automatically go down to keep constraint. But this does not happen. ScrollView stays as it is and overlaps with increased UILabel.
Here is what you should do.
With all of your current settings,
Don't use height constraint for label,
set number of line to 0 to label
You don't need to add any calculation of height of label, it will adjust it's height according to text
PS: if you want to have some height constraint to set minimum height of label, you can use "Greater or equal to instead of equal"
Related
I got a UIView whose child is a UILabel. I then aligned the left, top, right, and bottom of the UILabel to that of its superview (the UIView) using constraints.
But what I'm getting is a UILabel that matches the height of its superview but not its intrinsic height (smaller or larger than its text content depending on the size of the UIView). What I expect is for the UIView to resize itself to fit exactly the height of the UILabel.
So how do I do this using only the interface builder?
In order to make the UILabel keep its size and force the outer view to resize you can update the values for Content Hugging Priority to 1000 (a.k.a. Required). This can be done in the measurements panel when selecting the label in Interface Builder.
I think they are set as a default to 750.
This should (if there is nothing else causing the change) make the label take its intrinsic content size and force its superview to conform to that size also.
Align top, trailing, bottom and leading of UILabel with UIView (add constraints).
Remove height and bottom constraints from UIView if any.
If the content is large, you probably need to wrap UILabel into a UIScrollView in place of UIView. and add a bottom constraint to UIScrollView
Content Hugging Priority of UILabel (251) is more than that of UIView (250) by default. Verify this
It's super easy using auto-layout. Just, follow these steps
1 - Drag a UIView and align it vertically and horizontallyin centre.
2 - Now drag UILabel into the UIView and align the label also horizontally and vertically in centre.Now, the IB aligns the label at the centre WRT to the superview and not the UIView.So, change that in the size-inspector section.
3 - Once you have done that and all red lines are removed, select both the label and the UIView together using the command key.
4 - Now, give them constraints as follows
leading = 0, trailing = 0 and select the equal width and equal height.
There you are done.If you wanna test that the UIView size is respective to the label's content, try increasing the label's font to a bigger size and you will see that the size of the view will be the same as the size of the label.
There , you are done :-D. Hope, this was helpful.
If someone is experiencing this issue, while:
Having 2 labels inside the UIView
Doing everything what was suggested here
In my case, I set Vertical Content Hugging Priority of BOTH UILabels to 1000. Then one of the labels had a different font. (ie. one label was supposed to be smaller than the other one)
The height was being ambiguous, because both labels were trying to force their height on the superview. Once I lowered the priority on the smaller label, everything worked fine.
I have one UILabel and One UIView contains other subviews side by side in Storyboard. The UIView should butt up against the right edge of the UILabel(trailing constraint of 1), but I also need the UIlabel (the one on the left) to set it's width equal to it's content size unless it hits a max width. Visually:
|Label text| |UIViewWithSubviews|
And I need the following constraints:
1) Label should resize width wise unless it hits a max size and height is also dynamic that means when text reaches the maximum width then the word wrap will break the sentence to another line. and UIview will become vertical to UIlabel.
2) UIView should always be butted up against the right edge of label one in vertical center.
How do I set this up in Storyboard?
Thanks In advance.
Is this what you need?
Here is how i did in Interface Builder.
1) Set a width constraint on the UILabel that is "Less Than Or Equal" to the max width you want.
2) Set the number of lines for the UILabel in the storyboard to be 0. This enables the wrapping you are looking for. Don't set any height constraint at all.
3) Set up constraint to center the UIView vertically with the UILabel.
4) Your other existing constraints sound fine. Just make sure that the UILabel has a clear x and y position, for example by anchoring to the leading and top edges of the superview. And make sure the UIView similarly has sufficient constraints as needed in addition to the vertical centering and the leading edge alignment with the UILabel.
I have a multiline UILabel inside a custom keyboard extension. I want this label to grow to fill the content up to a certain height, at which point I want it to just cut off the rest of the text.
Because the keyboard has different heights depending on the device and orientation, I can't just set a simple less than or equal height constraint.
What I tried was to constrain the bottom of the label to the top of the buttons below, with a greater than or equal constraint. This works to a certain extent, but causes the keyboard to grow in size as opposed to the label being forced to cut off its text.
How would I force the label to a max height, without directly using a height constraint on the label?
Put the label in a UIView and constrain the view's height to less than or equal.
I already set UIImageView.width（Green Color Background） == UILabel.width + 20 in my tableView cell ，but when the label's content changing , the label 's height is changing at first ,but I want the label to grow wider first , if it can't be more wider then grow higher. what 's the problem here
Hi yes you can do it. I am explaining below how can u do it with auto layout.
At the time of applying constraint, instead of giving hight and width
to UIImageView just try to give it three constraint with UILabel which
are " Equal Width, Equal Height and Aspect Ratio"
For Applying these three constraints with UILabel the shortcut is just
drag and drop your mouse cursor from UIImage to UIlabel with right
click only, so you can see above three options. After applying it ,give
UIlabel Leading and trailing constraint( or whatever u want) and most important thing, set
your UIlabel to size to content fit. For UILabel,shortcut is just
click on UILabel and click on top toolbar's tab EDITOR and you will
find option for setting UILABEL as size to content fit so after
setting it UILabel will automatically set its frame as per its content
and so as UIImageView.
I am really confused about constraints is iOS, i've read a lot of articles, but get stuck, when tried to set Height constraints of UIView according to UILabel content height. I know that is the common question, but i really don't understand the solutions. I thought that the main thing in this question is the constraint priority, but i can't set them properly. In one case, the height of UIView wont change to 0, and in other UILabel height does not make any sense.
So. I've got:
UIView with height constraint, and descendants constraints (below)
UIImageView with height=32, width=32, top=10, left=10, bottom>=10
UILabel with left to UIImageView = 10, top=10, right=10, bottom=10
And i want:
If i got any text to place in the UILabel, i want to dynamic height of UIView according to height of content size of UILabel.
And if there is no text to place in UILabel, i want to set the height of UIView equals to 0 (hide the UIView totally).
UIImageView - is just the icon. If there is no text, must be shrink to 0, if there is some text, must have height 32, top constraint 10, bottom constraint more or equals to 10.
UPD:
Fix the problem, by adding height constraint programmatically. (don't like this)
You can make the constraints take full control of the label,image and view heights, if you set the priorities correctelly.
Set the four vertical margins priorities to less than 1000 (lets say 999)
Set the image height priority to 999 too.
Set lable vertical hugging priority to 1000
Set image height less than or equal label height with 1000 priority
Set label height less than or equal container view height with multiplier 1: 10(or any big number) with priority 1000
Like this
The View is this
and this