Music Controls - nahtedetihw/SnowboardWIKI GitHub Wiki
To theme the Music Controls you need to download "Snowboard UI Extension" from Spark's Repo
Note: the prefix @3x is used mostly for Plus devices (iPhone Plus/X/XS/11 Pro/11 Pro Max) and @2x for regular size devices (iPhone 5s/SE/6/7/8/XR/11) See here for more information on scales: https://developer.apple.com/design/human-interface-guidelines/ios/icons-and-images/image-size-and-resolution/
Let's get started.
Lockscreen and Control Center
All files need to be placed inside CustomTheme.theme/Bundles/com.apple.MediaControls
Play Button
Pause Button
Next Button
Previous Button
Stop Button
Volume Indicators
This one goes inside CustomTheme.theme/Bundles/com.apple.MediaPlayer
and it only themes the volume slider in the Lockscreen
Volume Slider
Apple Music
All files need to be placed inside CustomTheme.theme/Bundles/com.apple.Music
Now Playing
Mini Player
Here's a theme preview made by Alo
Apple Music
Lockscreen Music