How to update Height of the view Programmatically?

Question

One issue i am facing related to autolayouts. I am setting height of view containing image views to zero first via autolayouts. But if certain function is called I want that height updated to a constant value, but height of my view is not getting updated. Here is the code, i have updated height programmatically inside the function but it is not working.

let heightContraint = NSLayoutConstraint(item: businessImageView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 40)
businessImageView.addConstraint(heightContraint)

Possible duplication of - https://stackoverflow.com/questions/43010173/how-to-programmatically-increase-the-height-of-uiview-with-swift — Rashed, Apr 11 '18 at 12:52
Possible duplicate of [How to programmatically increase the height of UIView with Swift](https://stackoverflow.com/questions/43010173/how-to-programmatically-increase-the-height-of-uiview-with-swift) — MRizwan33, Apr 11 '18 at 12:53
[How to update the constant height constraint of a UIView programatically?](https://stackoverflow.com/a/49776158/6822622) — AshvinGudaliya, Oct 24 '18 at 07:11

score 3 · Answer 1 · answered Apr 11 '18 at 12:50

First create IBOutlet of the height constraint.

You just need to change constant property of the constraint. For e.g.:

self.consTblFilterHeight.constant = 100.0
self.view.layoutIfNeeded()

Replace self.view with the parent view of the view you are changing the height.

score 1 · Answer 2 · answered Apr 11 '18 at 12:47

1

Create your constraint outlet and then set it like this :

self.heightConstraintOutlet.constant = newHeightValue

answered Apr 11 '18 at 12:47

Shivam Tripathi

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score 0 · Answer 3 · edited Jun 20 '20 at 09:12

0

Approach

activate constraint
change constant value

Code

heightConstraint.isActive = true 
heightConstraint.constant = 20

edited Jun 20 '20 at 09:12

Community

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answered Apr 11 '18 at 12:49

user1046037

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Thanks that was a typo – user1046037 Apr 11 '18 at 12:52

score 0 · Answer 4 · answered Apr 11 '18 at 12:51

businessImageView.addConstraint(heightContraint) is not the code to update the constraint. It adds a constraint.
So as to update the height of parent view (which has images), you would need to update the constant for businessImageView's height constraint.

businessImageView.heightConstraint.constant = 40
self.view.layoutIfNeeded()

score 0 · Answer 5 · answered May 12 '23 at 11:43

// lets detect the height of our screen here

 int height = [UIScreen mainScreen].bounds.size.height;
    int width = [UIS

creen mainScreen].bounds.size.width;

// share the news


 NSString *message = [[NSString alloc]initWithFormat:@"This screen is \n\n%i pixels high and\n%i pixels wide", height, width];
    NSLog(@"%@", message);

How to update Height of the view Programmatically?

5 Answers5

Approach

Code