Code=3072 “The operation was cancelled” when setting alternate app icon

Question

I am trying to set an alternate app icon named MyIcon in my iOS app. I have a MyIcon.png image in my project bundle (not in my Assets folder) and it is

Answer 1

I was getting this error because of two reasons,

• First, I didn't do "Add Files to 'ProjectNameFoo'" by adding png file to project. Otherwise it didn't work. After that it started to see icon.

• Secondly, I was getting this error because I was trying to change icon after in viewDidLoad. I don't why but it was giving me same error. When I try with a delay like the code below it was working whatever second I gave.

  override func viewDidLoad() {
      super.viewDidLoad()
  
      delay(0.01) {
          if foo().isFoo() {
              print("")
  
              self.changeIcon(name: "ColdRabbit")
          }
          else {
              print("")
          }
      }
  }
  
  func delay(_ delay:Double, closure:@escaping ()->()) {
      let when = DispatchTime.now() + delay
      DispatchQueue.main.asyncAfter(deadline: when, execute: closure)
  }
  

Answer 2

I was stuck with this error for quite a while and tried all sorts of things but couldn't work out what I was doing wrong. I was changing the icon from AppDelegate.application(didFinishLaunchingWithOptions:). Delaying the call with a timer as suggested above did solve it.

It is worth noting that this problem is due to UIKit trying to show a UIAlertController with the message

You have changed the icon for $(PRODUCT_NAME)

and that didn't seem to work at that point. You need to wait until a root view controller is loaded.

This is because this API is not meant to for the developer to update the icon arbitrarily, but for the user to deliverability choose one.