Swift Closures in for loop

swift

Solution

You can use a `DispatchGroup` for this. It works like a counted semaphore. You can increase the count by calling `enter` and decrease the count by calling `leave`. You can schedule a closure to be executed when the count reaches 0 using `notify`:

let dispatchGroup = DispatchGroup()
var noOfTimes = 10
for i in 0..<noOfTimes {
    dispatchGroup.enter()  //  Enter the dispatch group
    someVariable.someClosure {
        result in
        // Process result
        ...
        dispatchGroup.leave() // Exit dispatch group
    }
}
dispatchGroup.notify(queue: DispatchQueue.main, execute: {
    print("All Done")
})

Problem

Currently I am having code which executes a closure inside a loop. I want to know when all the closures have finished executing. Currently I am using a counter and incrementing it when the closure is completed and then I compare it with the no of times to be executed. Code is below ``` var count = 0 var noOfTimes = 10 for i in 0..<noOfTimes { someVariable.someClosure { result in count = count + 1 if count == noOfTimes { //do something } } } ``` Is there a better way to do this without the counter. Thanks.

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