Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Build a Playlist Browser with Swift Building the Music Library and Playlist Models Creating a Music Library

Posted by haodong ruan
haodong ruan
1,755 Points

Why we need make a struct for the musicLibrary? Why not just make it as a global constant?

  1. I am not sure I am fully understand the struct. I think everytime we create a new struct, there will create a memory (copy the all of property to a new struct) . When we make a playlist, we should create a MusicLibrary struct every PlayList struct Initialized ?
  2. My idea is create a global constant, and just refer the global constant when we create a new playlist struct. Does it work?