How to use dispatch_get_main_queue swift 3?

I could not understand, but it does not work. I try to Execute:

DispatchQueue.main.async {

self.refreshControl.beginRefreshing()

}

But it does not work.

Also

dispatch_async(dispatch_get_main_queue(), {

self.refreshControl.beginRefreshing()

}

in Swift 2 work perfect.

Try the following:

DispatchQueue.main.async(execute: {
    /// code goes here
})

DispatchQueue.main.async(execute: {

self.refreshControl.beginRefreshing()

})

It still do not work 😟

Does it not execute, or do you get an error?

1) No Errors

2) Code executed (I add some print("test") inside), but I think NOT in main thread, because I do not see any changes in GUI

… but I think NOT in main thread …

Add code like this to your block:

assert(Thread.isMainThread)

That’ll trap if you’re off the main thread. Conversely, if it doesn’t trap then you know the problem is something else.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Thank you so much. I found a problem.

It happens, because I executed:

self.refreshControl.beginRefreshing()

twice. After I removed the second execution everything start works perfect. Also in Swift 2 it works without any problem.