ios - Syntax of Block in Swift

Question

I am trying to rewrite from Objective-C to Swift, I cannot work out the syntax or understand the docs

Here is a simplified example in Objective-C I wrote:

[UIView animateWithDuration:10.0 animations:^{self.navigationController.toolbar.frame = CGRectMake(0,10,0,10);}];

How do I write this in Swift?

This is the template autocomplete gives:

UIView.animateWithDuration(duration: NSTimeInterval, animations: (() -> Void))

Answer 1

This is the swift closure format:

{(parameter:type, parameter: type, ...) -> returntype in
    //do stuff  
}

This is what you should do:

//The animation closure will take no parameters and return void (nothing).
UIView.animateWithDuration(duration: NSTimeInterval, animations: {() -> Void in
    //Animate anything.
})

Here is the documentation for closures.