What is the equivalent of @autoreleasepool in Swift?

问题

In Swift, I notice there is no @autoreleasepool{} construct, although Swift does use ARC. What is the proper way to manage an autoreleasepool in Swift, or has it been removed for some reason?

回答1:

This is explained in detail in WWDC 2014 session video number 418 "Improving Your App with Instruments", which you can also download as a PDF.

But in short, the syntax is:

autoreleasepool {
  /* code */ 
}

回答2:

Just FYI, Xcode constructed the full code as follows:

autoreleasepool({ () -> () in
    // code              
})

Guess the parentheses identifies the functions closure.

回答3:

There is! It's just not really mentioned anywhere.

autoreleasepool {
    Do things....
}

来源：https://stackoverflow.com/questions/24152050/what-is-the-equivalent-of-autoreleasepool-in-swift