Sort array on two parameters in swift

问题

I want to sort an array on two parameters, for example, name and then by description. Sorting the array first by name and then by description won't work because then the array won't be sorted by name.

The solution should be something like this:

var sortedArray = sorted(items, { (o1: MyObject, o2: MyObject) -> Bool in
            return o1.name < o2.name and o1.description < o2.description
        })

Thanks

回答1:

Your syntax looks correct. Just change the closure to

return o1.name == o2.name ? (o1.description < o2.description) : (o1.name < o2.name)

If you want more than two sort criteria I recommend using the old fashioned sort descriptors.

let sortedArray = (unsortedArray as NSArray).sortedArrayUsingDescriptors([
  NSSortDescriptor(key: "name", ascending: true),
  NSSortDescriptor(key: "description", ascending: true),
  .... 
]) as! [Object]

来源：https://stackoverflow.com/questions/27193645/sort-array-on-two-parameters-in-swift