Re: when has AutoLayout finished its work?
Re: when has AutoLayout finished its work?
- Subject: Re: when has AutoLayout finished its work?
- From: Ken Thomases <email@hidden>
- Date: Wed, 26 Nov 2014 02:35:47 -0600
On Nov 26, 2014, at 2:00 AM, Gerriet M. Denkmann <email@hidden> wrote:
> On 26 Nov 2014, at 13:15, Ken Thomases <email@hidden> wrote:
>>
>> Finally, have you considered leaving translatesAutoresizingMaskIntoConstraints set to YES for the view and setting its autoresizing mask? In that case, calls to set the frame will establish constraints that will maintain that new frame as per the old springs-and-struts model of the autoresizing mask.
>
> Did change in Xcode "Use Auto Layout" to off for my CustomView.
> But this did turn off Auto Layout for ALL things in the window. Not quite what I had in mind. So: back to "On".
There's no view-specific "Use Auto Layout" setting. You were probably looking at the File inspector, which, of course, is for the file as a whole.
> Then I added in my CustomView:
>
> - (instancetype)initWithFrame:(NSRect)frameRect
> {
> self = [ super initWithFrame: frameRect ];
> if ( self == nil ) return nil;
> self.translatesAutoresizingMaskIntoConstraints = YES;
> self.autoresizingMask = NSViewHeightSizable;
> return self;
> }
>
> But still AutoLayout was messing with my view, setting its size to (0,0).
The NIB-loading machinery would set translatesAutoresizingMaskIntoConstraints to NO after it has instantiated your view, so it would effectively override what you set in your init method.
> Finally I settled with:
>
> - (void)windowDidLoad
> {
> [super windowDidLoad];
> [ self performSelector: @selector(updateFrame:) withObject: @(0) afterDelay: 1 ];
> }
>
> This has the (small) disadvantage that the window initially shows a boring grey custom view for one second.
And the view could be reset to have zero size at any time, whenever the auto layout system lays out the view hierarchy again.
Don't try to bypass auto layout. It's only going to end in frustration. When you're using auto layout, either have your view class report an intrinsic size, set up constraints to maintain its size, or set translatesAutoresizingMaskIntoConstraints. You can do the latter in -windowDidLoad and it won't be overridden by the NIB-loading machinery.
Regards,
Ken
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