How to add a 5 second delay to a function

Question

Created Dec ’20

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I have a function that changes the Table type (background) at points in a game. The change happens ok but I am trying to add a 5 second delay before the switch from the current table type to the new table type but I cannot get the delay to work.

The code for the replace table function is below. Any help would be great.

func replaceTable() {
//add delay between table change

let secondsToDelay = 5.0
DispatchQueue.main.asyncAfter(deadline: .now() + secondsToDelay) {

// remove existing table before adding new one

if let table = self.currentTable {
table.removeFromParent()
self.currentTable = nil
} }

let table = SKSpriteNode(imageNamed: tableType.imageName)
addChild(table)
table.position = CGPoint(x: size.width/2, y: size.height/2)
table.zPosition = -1 switch tableType {

case .bond:

//...

break

case .ovaloffice:

//...

break

case .austin:

//...

break

case .deadpool:

//...

break

case .moesbar:

//...

break

case .casino:

//...

break
}

}

Boost

Answer 1

Claude31 OP

Dec ’20

Your text formatting is terrible.
Please use formatter (<>) to improve, and paste code with Paste and Match Style:

Code Block func replaceTable() {
        //add delay between table change
    let secondsToDelay = 5.0
    DispatchQueue.main.asyncAfter(deadline: .now() + secondsToDelay) {
            // remove existing table before adding new one
            if let table = self.currentTable {
               table.removeFromParent()
               self.currentTable = nil
            } 
		 }
	 let table = SKSpriteNode(imageNamed: tableType.imageName)
 	 addChild(table)
 	 table.position = CGPoint(x: size.width/2, y: size.height/2)
	 table.zPosition = -1
   switch tableType {

What happens:

line 5, you dispatch
then execution continues immediately at line 13
and line 7 will be executed after 5 seconds.

To see this, instrument code as follows:

Code Block      func replaceTable() {
          //add delay between table change
          let secondsToDelay = 5.0
          print("Before")
          DispatchQueue.main.asyncAfter(deadline: .now() + secondsToDelay) {
               // remove existing table before adding new one
               print("Delayed")
               if let table = self.currentTable {
                    table.removeFromParent()
                    self.currentTable = nil
               }
          }
          print("After")
          let table = SKSpriteNode(imageNamed: tableType.imageName)
          addChild(table)
          table.position = CGPoint(x: size.width/2, y: size.height/2)
          table.zPosition = -1
          switch tableType {

You will get on Console:
Before
After
And 5 seconds later
Delayed

So you need to move lines 13 and onward inside the dispatch, at the end.

2