Swift Sort array of objects alphabetically

Question

I have this   class Movies     Name String   Date Int     and an array of  Movies   How do I sort the array alphabetically by name  I ve tried   movieArr   movieArr sorted   0  lt   1    and   movieArr   sorted movieArr   but that doesn t work because I m not accessing the name attribute of Movies

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With Swift 3  you can choose one of the following ways to solve your problem     1  Using sorted by    with a Movie class that does not conform to Comparable protocol  If your Movie class does not conform to Comparable protocol  you must specify in your closure the property on which you wish to use Array s sorted by    method   Movie class declaration   import Foundation  class Movie  CustomStringConvertible        let name  String     var date  Date     var description  String   return name        init name  String  date  Date   Date              self name   name         self date   date            Usage   let avatarMovie   Movie name   Avatar   let titanicMovie   Movie name   Titanic   let piranhaMovie   Movie name   Piranha II  The Spawning    let movies    avatarMovie  titanicMovie  piranhaMovie  let sortedMovies   movies sorted by     0 name  lt   1 name       let sortedMovies   movies sorted    0 name  lt   1 name      also works  print sortedMovies      prints   Avatar  Piranha II  The Spawning  Titanic         2  Using sorted by    with a Movie class that conforms to Comparable protocol  However  by making your Movie class conform to Comparable protocol  you can have a much concise code when you want to use Array s sorted by    method   Movie class declaration   import Foundation  class Movie  CustomStringConvertible  Comparable        let name  String     var date  Date     var description  String   return name        init name  String  date  Date   Date              self name   name         self date   date            static func    lhs  Movie  rhs  Movie  - gt  Bool           return lhs name    rhs name            static func  lt  lhs  Movie  rhs  Movie  - gt  Bool           return lhs name  lt  rhs name            Usage   let avatarMovie   Movie name   Avatar   let titanicMovie   Movie name   Titanic   let piranhaMovie   Movie name   Piranha II  The Spawning    let movies    avatarMovie  titanicMovie  piranhaMovie  let sortedMovies   movies sorted by     0  lt   1       let sortedMovies   movies sorted    0  lt   1      also works    let sortedMovies   movies sorted by   lt      also works  print sortedMovies       prints   Avatar  Piranha II  The Spawning  Titanic          3  Using sorted   with a Movie class that conforms to Comparable protocol  By making your Movie class conform to Comparable protocol  you can use Array s sorted   method as an alternative to sorted by      Movie class declaration   import Foundation  class Movie  CustomStringConvertible  Comparable        let name  String     var date  Date     var description  String   return name        init name  String  date  Date   Date              self name   name         self date   date            static func    lhs  Movie  rhs  Movie  - gt  Bool           return lhs name    rhs name            static func  lt  lhs  Movie  rhs  Movie  - gt  Bool           return lhs name  lt  rhs name            Usage   let avatarMovie   Movie name   Avatar   let titanicMovie   Movie name   Titanic   let piranhaMovie   Movie name   Piranha II  The Spawning    let movies    avatarMovie  titanicMovie  piranhaMovie  let sortedMovies   movies sorted    print sortedMovies       prints   Avatar  Piranha II  The Spawning  Titanic

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import Foundation import CoreData   extension Messages         nonobjc public class func fetchRequest   - gt  NSFetchRequest lt Messages gt            return NSFetchRequest lt Messages gt  entityName   Messages               NSManaged public var text  String       NSManaged public var date  Date       NSManaged public var friends  Friends            here arrMessage is the array you can sort this array as under bellow       var arrMessages    Messages         arrMessages sort    arrMessages1  arrMessages2  - gt  Bool in                arrMessages1 date   gt  arrMessages2 date

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In the closure you pass to sort  compare the properties you want to sort by  Like this   movieArr sorted    0 name  lt   1 name     or the following in the cases that you want to bypass cases   movieArr sorted    0 name lowercased    lt   1 name lowercased       Sidenote  Typically only types start with an uppercase letter  I d recommend using name and date  not Name and Date     Example  in a playground   class Movie       let name  String     var date  Int       init   name  String            self name   name          var movieA   Movie  A   var movieB   Movie  B   var movieC   Movie  C    let movies    movieB  movieC  movieA  let sortedMovies   movies sorted    0 name  lt   1 name   sortedMovies   sortedMovies will be in the order  movieA  movieB  movieC      Swift5 Update   channelsArray   channelsArray sorted    channel1  channel2  - gt  Bool in             let channelName1   channel1 name             let channelName2   channel2 name             return  channelName1 localizedCaseInsensitiveCompare channelName2      orderedAscending

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For those using Swift 3  the equivalent method for the accepted answer is   movieArr sorted    0 Name  lt   1 Name

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Sorted array Swift 4 2  arrayOfRaces   arrayOfItems sorted by      0  raceName   as  String   lt    1  raceName   as  String

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let sortArray    array sorted by     0 name lowercased    lt   1 name lowercased

User · Answer

Most of these answers are wrong due to the failure to use a locale based comparison for sorting  Look at localizedStandardCompare

[ios] Swift: Sort array of objects alphabetically

1. Using `sorted(by:?)` with a `Movie` class that does not conform to `Comparable` protocol

2. Using `sorted(by:?)` with a `Movie` class that conforms to `Comparable` protocol

3. Using `sorted()` with a `Movie` class that conforms to `Comparable` protocol

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