ios - Swift UIPageViewController & UIActivityIndicatorView -

is aware of issue stopping uiactivityindicatorview (ai) / removing uiview has been added uipageviewcontroller?

i showing ai using:

override func viewwilllayoutsubviews() {     actind.frame = cgrectmake(0,0, 80, 80)     actind.center.x = self.view.center.x     actind.center.y = self.view.center.y - 40     actind.hideswhenstopped = true     actind.layer.cornerradius = 5     actind.alpha = 0.5     actind.backgroundcolor = uicolor.blackcolor()     actind.activityindicatorviewstyle = uiactivityindicatorviewstyle.whitelarge     self.view.addsubview(actind)     actind.startanimating()      // next line prints out details of each subview on page testing purposes     listsubviews(self.view) 

i also, testing purposes, adding blank uiview view using:

    aview.frame = cgrectmake(0, 0, 200, 200)     aview.backgroundcolor = uicolor.bluecolor()     self.view.addsubview(aview) } 

then send parse.com query using delegate advise uipageviewcontroller (e.g. view) when data ready. working fine , have tested data returns correctly, , expected method being called.

in method try stop uiactivityviewcontroller & try hide aview:

self.actind.stopanimating() aview.removefromsuperview() 

this didn't work tried:

self.actind.removefromsuperview() 

this didn't work either. tried search through subviews on current view using:

func populateboards(boards: [board]) {     println(self.actind) // print line 1      var subviews = self.view.subviews      v in subviews {          if v.iskindofclass(uiactivityindicatorview) {             println("yes, activity view indicator \(v)") // print line 2             v.stopanimating()             v.removefromsuperview()         }      }      self.boards = boards     println("populated boards!") // print line 3 } 

print line 1 outputs: >

print line 2 outputs: yes, activity view indicator >

print line 3 outputs: "populated boards!"

edit:

the uipageviewcontroller setup following code (in case helps):

func setupuipageview() {      self.pageviewcontroller = uipageviewcontroller(transitionstyle: uipageviewcontrollertransitionstyle.scroll, navigationorientation: uipageviewcontrollernavigationorientation.horizontal, options: nil)     self.pageviewcontroller.delegate = self     self.pageviewcontroller.datasource = self      var startvc = self.viewcontrolleratindex(0) viewcontroller     var viewcontrollers:[viewcontroller] = [startvc]      self.pageviewcontroller.setviewcontrollers(viewcontrollers, direction: .forward, animated: true, completion: nil)      self.pageviewcontroller.view.frame = cgrectmake(0, 0, self.view.frame.width, self.view.frame.height)      self.pageviewcontroller.view.alpha = 0.0      self.addchildviewcontroller(self.pageviewcontroller)     self.view.addsubview(self.pageviewcontroller.view)     self.pageviewcontroller.didmovetoparentviewcontroller(self)  } 

help! in advance :d

you should call ui related code on main queue. parse query async , completion block might called on different thread.

wrap call in block:

nsoperationqueue.mainqueue().addoperationwithblock {   self.actind.stopanimating() }