How can I delay a method call for 1 second

Question

Is there an easy way delay a method call for 1 second   I have a UIImageView that reacts on a touch event  When the touch is detected  some animations happen in the app  After one second  I want to call another method  In this case  I can t use the animationDidStop selector

User · Answer

You can use the perform selector for after the 0 1 sec delay method is call for that following code to do this    self performSelector  selector InsertView   withObject nil afterDelay 0 1

User · Answer

There are already a lot of answers and they are all correct  In case you want to use the dispatch after you should be looking for the snippet which is included inside the Code Snippet Library at the right bottom  where you can select the UI elements      So you just need to call this snippet by writing dispatch in code

User · Answer

performSelector withObject afterDelay    Document Reference

User · Answer

NOTE  this will pause your whole thread  not just the one method  Make a call to sleep wait halt for 1000 ms just before calling your method   Sleep 1000      does nothing the next 1000 mSek  Methodcall params      now do the real thing   Edit  The above answer applies to the general question  How can I delay a method call for 1 second    which was the question asked at the time of the answer  infact the answer was given within 7 minutes of the original question  -     No Info was given about the language at that time  so kindly stop bitching about the proper way of using sleep i XCode og the lack of classes

User · Answer

Use in Swift 3  perform  lt Selector gt   with   lt object gt   afterDelay   lt Time in Seconds gt

User · Answer

Best way to do is      self performSelector  selector YourFunctionName              withObject  can be Self or Object from other Classes              afterDelay  Time Of Delay      you can also pass nil as withObject  parameter    example      self performSelector  selector subscribe  withObject self afterDelay 3 0

User · Answer

You can also    UIView animateWithDuration 1 0                  animations    self view alpha   1 1     Some fake chages                       completion   BOOL finished        NSLog   A second lapsed           This case you have to fake some changes to some view to get the animation work  It is hacky indeed  but I love the block based stuff  Or wrap up  mcfedr answer below     waitFor 1 0          NSLog   A second lapsed            typedef void   WaitCompletionBlock     void waitFor NSTimeInterval duration  WaitCompletionBlock completion        dispatch after dispatch time DISPATCH TIME NOW  duration   NSEC PER SEC                      dispatch get main queue            completion

User · Answer

There is a Swift 3 solution from the checked solution    self perform  selector self targetMethod   with  self  afterDelay  1 0    And there is the method   objc fileprivate func targetMethod

User · Answer

You can do this   self performSelector  selector MethodToExecute  withObject nil afterDelay 1 0

User · Answer

Swift 2 x  let delayTime   dispatch time DISPATCH TIME NOW  Int64 1   Double NSEC PER SEC     dispatch after delayTime  dispatch get main queue       print  do some work       Swift 3 x -- amp -- Swift 4  DispatchQueue main asyncAfter deadline   now     1 0        print  do some work       or pass a escaping closure   func delay seconds  Double  completion   escaping  - gt  Void        DispatchQueue main asyncAfter deadline   now     seconds  execute  completion

User · Answer

You could also use a block  dispatch after dispatch time DISPATCH TIME NOW  1   NSEC PER SEC   dispatch get main queue            object method          Most of time you will want to use dispatch get main queue  although if there is no UI in the method you could use a global queue   Edit   Swift 3 version   DispatchQueue main asyncAfter deadline   now     1        object method       Equally  DispatchQueue global   asyncAfter     might also be a good option

[ios] How can I delay a method call for 1 second?

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