objective c - NSWindow animate size change new subview with auto layout -


i have nswindowcontroller containing several nsviewcontroller. windowcontroller displays view of first viewcontroller subview of main window.

on button click windowcontroller adds next viewcontrollers view subview, adds layout constraints , animates them first view moves out , next view moves in. after animation first view removed superview.

[nextcontroller setleftlayoutconstraint:nextleft]; //              ^^^^^^^^^^^^^^^^^^^^^^^  custom category'd property  [containerview addsubview:nextview]; [containerview addconstraints:@[nextwidth, nextheight, nexttop, nextleft]];  [nsanimationcontext runanimationgroup:^(nsanimationcontext *context) {     [context settimingfunction:[camediatimingfunction functionwithname:kcamediatimingfunctioneaseout]];     [context setduration:0.5];      [[nextleft animator] setconstant:[self leftoffset]];      [[[[self currentviewcontroller] view] animator] setalphavalue:-0.25]; // negative alpha shift timing     [[[[self currentviewcontroller] leftlayoutconstraint] animator] setconstant:-nswidth(containerview.frame)];     //                              ^^^^^^^^^^^^^^^^^^^^  custom category'd property } completionhandler:^{     [[[self currentviewcontroller] view] setalphavalue:1.0];     [[[self currentviewcontroller] view] removefromsuperview];     [[self currentviewcontroller] removefromparentviewcontroller];      _currentviewcontroller = nextcontroller; }];

now second view taller first changes windows hight well.

unfortunately window frame change not animated , window pops ugly in right size.

i tried getting next views hight first animate constraints or this. unfortunately views not in correct size before animation done.

is there way animate window change well?


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