ios - How i can display a image -


how can display image automatically 5 seconds after open page , move ?

i have piece of code, image display automatically 5 seconds after open page not move why.

class yourviewcontroller: uiviewcontroller{   @iboutlet weak var moveobj: uiimageview!  override func viewdidload(){      super.viewdidload()      moveobj.hidden = true      moveobj.alpha = 0      nstimer.scheduledtimerwithtimeinterval(5, target: self, selector: #selector(uiviewcontroller.showmybtn), userinfo: nil, repeats: false)     }    func showmybtn(){          uiview.animatewithduration(1, animations: {          self.moveobj.hidden = false         self.moveobj.alpha = 1         })       }  }   override func viewdidappear(animated: bool) {           super.viewdidappear(animated)           let orbit = cakeyframeanimation(keypath: "position")         var affinetransform = cgaffinetransformmakerotation(0.0)         affinetransform = cgaffinetransformrotate(affinetransform, cgfloat(m_pi))         let circlepath = uibezierpath(arccenter: cgpoint(x: 198 - (100/2),y: 135 - (100/2)), radius:  cgfloat(155), startangle: cgfloat(255), endangle:cgfloat(m_pi * 2), clockwise: true)           orbit.path = circlepath.cgpath         orbit.duration = 3         orbit.additive = true         orbit.repeatcount = 0.2         orbit.calculationmode = kcaanimationpaced           moveobj.layer .addanimation(orbit, forkey: "orbit")


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