How to update MPNowPlayingInfoCenter in Swift?

Question

In objective c, I've been using code like this to update MPNowPlayingInfoCenter:

[[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo: 
    @{ MPMediaItemPropertyArtist : @"Artist!",
        MPMediaItemPropertyTitle : @"Title! }];

But in Swift, it doesn't seem like the function "setNowPlayingInfo" is recognized:

MPNowPlayingInfoCenter.defaultCenter()....  // Can't identify 'setNowPlayingInfo()'

Is there anything I'm missing?

try `MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = [MPMediaItemPropertyArtist : "Artist!", MPMediaItemPropertyTitle : "Title!]`, setters/getters behave quite differently in Swift from ObjC — Jack, Jun 17 '14 at 18:43
@JackWu thanks so much. Yep, still getting the hang of Swift. — jmkr, Jun 17 '14 at 18:56

score 5 · Accepted Answer · edited Jan 22 '15 at 06:28

5

In Swift, getters/setters work differently. Since there are no more properties like in ObjC, there are no automatically generated setters/getters for you. You should just access the variable directly.

In your case, use:

MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = [MPMediaItemPropertyArtist : "Artist!",  MPMediaItemPropertyTitle : "Title!"]

edited Jan 22 '15 at 06:28

Nikos M.

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answered Jun 17 '14 at 18:58

Jack

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As of today, i can't get it to work... get a error **type "String" does not conform to protocol 'AnyObject'** – KennyVB Jan 14 '15 at 19:12

score 1 · Answer 2 · edited Jun 26 '16 at 13:46

1

Swift 2, this also work:

let songInfo: [String:AnyObject] = [
         MPMediaItemPropertyTitle: mySoundTrack.TrackName,
         MPMediaItemPropertyArtist: String(mySoundTrack.TrackID),
         MPMediaItemPropertyArtwork: albumArt
]

MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = songInfo

edited Jun 26 '16 at 13:46

Taimur Ajmal

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answered Oct 10 '15 at 00:37

Franck

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score 0 · Answer 3 · answered Jul 04 '17 at 15:47

Previous answer by @Jack no longer works as is, and needs some modifications.

Swift 3 compiler complains about 2 things.

String is not directly convertible to AnyObject, and so the two dictionary entry values must be casted from String to AnyObject.
defaultCenter() has been renamed to default().

so a viable code will look like this:

MPNowPlayingInfoCenter.default().nowPlayingInfo = [MPMediaItemPropertyArtist : "Artist!" as AnyObject,  MPMediaItemPropertyTitle : "Title!" as AnyObject]

How to update MPNowPlayingInfoCenter in Swift?

3 Answers3