Enum raw value comparisons

It’s a good practice to take an enum for TableView sections instead of writing if conditions for indexPath.section

     

  if section == 0 {} 

  if section == 1 {} 

Instead of this take an enum like below for example as a Profile screen.

     

 enum ProfileSections: Int {

    case Profile = 0,

    Info,

    Friends

 }

Now, usually what we do is like below,

     

 if section == ProfileSections.Profile.rawValue 

  {print("Profile Section")}

 if section == ProfileSections.Info.rawValue 

  {print("Info Section")}

 if section == ProfileSections.Friends.rawValue    

  {print("Friends Section")}

If we write like this, there is no point of taking an enum. Because It’s same like,

     

 if indexPath.section == 0 {} 

 if indexPath.section == 1 {} 

Agree?

The better approach would be below.

     

 let section = 2

 if let profileSection = ProfileSections(rawValue: section) {

    switch profileSection {

    case .Profile:

        print("Profile Section")

    case .Info:

        print("Info Section")

    case .Friends:

        print("Friends Section")

    }

 }

Convert the section to ProfileSections and write a switch case.

Incase you will need to add a new section like Bio, It’s as simple as adding another switch case.

     

 enum ProfileSections: Int {

    case Profile = 0,

    Info,

    Bio,

    Friends

 }

 if let profileSection = ProfileSections(rawValue: section) {

    switch profileSection {

    case .Profile:

        print("Profile Section")

    case .Info:

        print("Info Section")

    case .Friends:

        print("Friends Section")

    case .Bio:

        print("Bio Section")

    }

 }

The beauty here, with switch, we get a build error for missing case :)

     

 // note: add missing case: '.Bio'

    switch profileSection {

    ^

Hope this post is useful. Feel free to comment incase of any queries.