ios - Unrecognized selector sent to instance with Swift -

i'm trying make slideshow app swift have problem, in main.storyboard add 1 imageview , 1 button, when user click on button slideshow animate.

i wrote code @ viewcontroller.swift

@iboutlet var imageview: uiimageview!  @iboutlet var animatebtn: uibutton!  @ibaction func animatebtnclicked(sender: uibutton) {     startanimation() }  var imagelist:[uiimage]=[]  override func viewdidload() {      super.viewdidload()    in 1 ... 3{         let imagename="\(i).jpg"      imagelist.append(uiimage(named: imagename)!)     }  }  func startanimation()->(){     if !imageview.isanimating()     {     imageview.animationimages=[imagelist]         imageview.startanimating()     animatebtn.settitle("stop animation", forstate:uicontrolstate.normal)}     else     {         imageview.stopanimating()     }  } 

at appdelegate.swift didn't write code.

but app crashed when clicked button , show message error

2014-12-02 09:54:55.693 #4 animation photo[921:613] -[swift._nsswiftarrayimpl _isresizable]: unrecognized selector sent instance 0x7f82126615d0 2014-12-02 09:54:55.698 #4 animation photo[921:613] *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[swift._nsswiftarrayimpl _isresizable]: unrecognized selector sent instance 0x7f82126615d0' 

uiimageview's animationimages property should array of uiimage objects. you're setting array of array of uiimage objects. that's because you've got array:

var imagelist:[uiimage]=[] 

...but when set property, wrap in square brackets, puts existing array another, further array:

imageview.animationimages=[imagelist] 

when imageview starts trying animate images, expects each element in array uiimage, instead finds array. tries invoke uiimage selector, _isresizable, on array object, , that's error you're seeing:

-[swift._nsswiftarrayimpl _isresizable]: unrecognized selector sent instance 0x7f82126615d0 

so, don't wrap array array. set directly property:

imageview.animationimages = imagelist