On Jul 31, 2014, at 10:05 AM, David Duncan <david.dun...@apple.com> wrote:
>
>
>> On Jul 30, 2014, at 9:00 PM, Gerriet M. Denkmann <gerr...@mdenkmann.de>
>> wrote:
>>
>>
>> On 31 Jul 2014, at 00:18, David Duncan <david.dun...@apple.com> wrote:
>>
>>>> That's the purpose of setting the auto-resizing mask to FlexibleWidth. At
>>>> least for title views, that causes UINavigationBar to send -sizeThatFits:
>>>> to the view.
>>>
>>> For UINavigationBar you shouldn’t need to even set flexible width, just
>>> implement -sizeThatFits:. Unfortunately UIToolbar does not call
>>> -sizeThatFits: for the views of bar button items.
>>>
>>> Gerriet, you can try setting the frame of the slider then calling
>>> -setNeedsLayout/-layoutIfNeeded on the toolbar to update the layout. If you
>>> do this within the standard layout callbacks it should go along with any
>>> animation that is already going.
>>
>> Following your suggestion I changed my code to:
>>
>> override func viewWillLayoutSubviews() // manage slider in
>> bottomToolBar
>> {
>> // current width of toolbar is all wrong. Need to do:
>> bottomToolBar.setNeedsLayout()
>> bottomToolBar.layoutIfNeeded()
>
> Assuming that you're in a typical case (the toolbar is the same width as your
> view) you can just use self.view.bounds.width instead of
> bottomToolBar.frame.size.width here. This is likely to be more robust
Really? This goes against my instinct… the desired result is that the slider
take up a certain percentage of its superview. Therefore the computation should
encode this relationship.
> (given that calling setNeedsLayout/layoutIfNeeded on the toolbar as you do
> above really should not change the toolbar’s size…).
This actually gets at a question I’ve had for a while—does -layoutIfNeeded
resize the receiver, or only its subviews? I’m not sure the docs are explicit
about this.
--Kyle Sluder
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