Toggle slow animation while debugging with iOS Device

I'm using xCode 4.3.1 and I need to use the option that the iOS Simulator has => Debug -> Toggle Slow Animation but while debugging with the iOS Device.

Is it possible?

It's not possible in exactly the same way as with the Simulator, but there is a good way to accomplish the same effect using lldb.

Use the debugger to pause code execution, and then enter the command:

p [(CALayer *)[[[[UIApplication sharedApplication] windows] objectAtIndex:0] layer] setSpeed:.1f]

into the debugger.

Thanks to this link for the solution.

In Swift 3:

UIApplication.shared.windows.first?.layer.speed = 0.1

Or, if you're anywhere in your AppDelegate and you only use one window, you can do this:

window?.layer.speed = 0.1

For Swift Apps:

Halt your code with a breakpoint and enter the following lldb command:

(lldb) p UIApplication.shared.windows.first?.layer.speed = 0.1

---

Alternatively you can obviously also change the speed somewhere in you code. For example with an #if preprocessor macro at application launch

func application(application: UIApplication,
   didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool 
{
    ...

    #if DEBUG
        application.windows.first?.layer.speed = 0.1
    #endif

Don't forget to set the DEBUG symbol in the "Swift Compiler - Custom Flags" section, "Other Swift Flags" line. You add the DEBUG symbol with a -DDEBUG entry.

Swift 5, add this line in AppDelegate or SceneDelegate class, that's depending on your base architecture :

// create and assign window object if not exist. 🤓
self.window = UIWindow(frame: UIScreen.main.bounds)

// starts slow motion 🤩
window?.layer.speed = 0.05

If you want to slow down the app only in one view controller, you can configure a breakpoint to continue execution after executing the command. You set this breakpoint in viewDidAppear. Then you can set another "non-stoppable" breakpoint to reverse the speed to 1X. You set this other breakpoint in viewDidDisappear.

Very simple. Can be kept in your breakpoint list deactivated and easily reused when needed.

In Objective-c works pretty good

self.window.layer.speed = .1f;