On 29 Jul 2014, at 22:14, Kyle Sluder <[email protected]> wrote:
>> On Jul 29, 2014, at 2:34 AM, "Gerriet M. Denkmann" <[email protected]>
>> wrote:
>>
>> I have a UIToolbar which contains a UISlider, flanked by two flexible spaces.
>> I would like to have this slider to be as big as possible.
>> Setting it's width does not make sense, as the UIToolbar width changes,
>> depending on device and orientation.
>>
>> And setting constraints on the slider seems to be impossible (Xcode 6 beta
>> 4).
>>
>> Any ideas?
>
> You need to put your slider inside of a subclass of UIView whose
> implementation of -sizeThatFits: returns an appropriate value.
This sounds like an excellent idea.
Now my bottom UIToolbar looks like:
Flexible Space, ViewWithSlider, Flexible Space
ViewWithSlider is:
import UIKit
class ViewWithSlider: UIView
{
init( coder: NSCoder )
{
let functionName = "-[ViewWithSlider initWithCoder] "
println(functionName + "will call super")
super.init(coder: coder)
}
override func updateConstraints()
{
let functionName = "-[ViewWithSlider updateConstraints] "
println(functionName + "will call super")
super.updateConstraints()
}
override func sizeThatFits( size: CGSize ) -> CGSize // never
called
{
let functionName = "-[ViewWithSlider sizeThatFits \(size)] "
let superSize = super.sizeThatFits( size )
println(functionName + "super fits \(superSize)")
return superSize
}
override func systemLayoutSizeFittingSize( size: CGSize ) -> CGSize
// never called
{
let functionName = "-[ViewWithSlider
systemLayoutSizeFittingSize \(size)] "
let superSize = super.systemLayoutSizeFittingSize( size )
println(functionName + "super fits \(superSize)")
return superSize
}
}
and it prints:
-[ViewWithSlider initWithCoder] will call super
-[ViewWithSlider updateConstraints] will call super
But nobody ever cares to call sizeThatFits or systemLayoutSizeFittingSize.
Overriding requiresConstraintBasedLayout and returning either YES or NO makes
no difference.
Anything else I forgot to override?
Kind regards,
Gerriet.
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