Snapkit: How to animate width/height and constrains

Created on 25 Feb 2016 · 3Comments · Source: SnapKit/SnapKit

Hello and sorry for posting here, but I can't find any other information about this.

I want to animate the height of a UIView to 0.0 and update the constrains at the same time. How would I do that?

Thanks in advance.

Source

netgfx

👍3

Most helpful comment

@netgfx

Something like:

box.snp_makeConstraints { make in
    make.left.equalTo(50)
}
…
UIView.animateWithDuration(5.0) {
  box.snp_updateConstraints { make in
      make.left.equalTo(50)
  }
  box.superview.layoutIfNeeded()
}

You may need to remakeConstraints rather than updateConstraints if you're not altering _just_ the constant value.

robertjpayne on 2 Mar 2016

👍89 ❤2

All 3 comments

@netgfx

Something like:

box.snp_makeConstraints { make in
    make.left.equalTo(50)
}
…
UIView.animateWithDuration(5.0) {
  box.snp_updateConstraints { make in
      make.left.equalTo(50)
  }
  box.superview.layoutIfNeeded()
}

You may need to remakeConstraints rather than updateConstraints if you're not altering _just_ the constant value.

robertjpayne on 2 Mar 2016

👍89 ❤2

Thanks that worked.

netgfx on 2 Mar 2016

👍4

superview.layoutIfNeeded() did the trick