ios - How to make tab bar view controller animate like modal transition? Like iTunes? -


ok, having tab bar controller animation problems trying mimic animation transition in apple's itunes when leave music player vc. right have media bar uiview sits on bottom of screen , animates whenever select tab isn't music player view (so selectedindex != (viewcontrollers?.count)!-1)

this fine, looking @ other tab bar animations cant make vertical/squish animation transition itunes. answer gave me how horizontally page - iphone: how switch tabs animation?

however doesn't work when make vertical. want dismiss transition if tab modal view controller. have:

func animatetotab(toindex: int) {         let tabviewcontrollers = viewcontrollers!         let fromview = selectedviewcontroller!.view         let toview = tabviewcontrollers[toindex].view         let fromindex = tabviewcontrollers.index(of: selectedviewcontroller!)          guard fromindex != toindex else {return}          // add toview tab bar view         fromview?.superview!.addsubview(toview!)         fromview?.superview!.sendsubview(toback: toview!)           // disable interaction during animation         view.isuserinteractionenabled = false          uiview.animate(withduration: 0.5, delay: 0.0, usingspringwithdamping: 1, initialspringvelocity: 0.3, options: uiviewanimationoptions.curveeaseout, animations: {              // slide views -offset             fromview?.superview!.center.y += screensize.height             //toview?.center   = cgpoint(x: (toview?.center.x)! - offset, y: (toview?.center.y)!);          }, completion: { finished in              // remove old view tabbar view.             fromview?.removefromsuperview()             self.view.isuserinteractionenabled = true         })         self.selectedindex = toindex     }

but current vc, music player, snaps original position after moves , switches selectedindex. tab bar controller makes viewcontrollers in right position before switching.

how can mimic modal dismiss animation tab bar vc?


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