dispatch_async in Swift

Question

I am really new to this programming language called swift.

I use

dispatch_async(dispatch_get_main_queue(), ^{
});

this method for async-dispatch-queue in xcode 5.

I want implement it in swift language.

how do i implement dispatch queue in or swift?

Answer 1

You can use this syntax:

dispatch_async(dispatch_get_main_queue(), {
    println("hello")
})

However, when the last argument is a block, Swift lets you put it outside the parentheses. This makes the function seem more like a control structure (like a for or if statement). Thus you can do this:

dispatch_async(dispatch_get_main_queue()) {
    println("hello")
}