ios - Displaying texts one by one in same UILabel -

i have uilabel in app display chat messages. these chat messages hardcoded array of strings. need display these messages 1 one on uilabel need have 2 second delay between switching messages user need read each message.

what have implemented following code:

for chattext in chatdialogue{                   dispatch_async(dispatch_get_main_queue(), {                      chatlabel.text=chattext as? string                 })                 println(chattext)                 nsthread .sleepfortimeinterval(2)             } 

here have array of chatdialogues

["hello","how you?","can dias","wait please"] 

now need these displayed on same label delay between changing messages.

the above implementation when executed showed last message on loop.

set nstimer fires every 2 seconds , stops when reaching last text:

// instance variables let chatdialoges = ["hello","how you?","can dias","wait please"] var textindex = 0 var timer: nstimer?  // ...  // somewhere timer should start self.timer = nstimer.scheduledtimerwithtimeinterval(2, target: self, selector: "update", userinfo: nil, repeats: true)  //  func update() {     self.textlabel++      if self.textlabel == chatdialoges.count {         self.timer?.invalidate()         return     }      chatlabel.text = chatdialoges[self.textindex] }