iOS11中swift4的MPMusicPlayerController的玩法的歧义使用 [英] Ambiguous use of play of MPMusicPlayerController in iOS11, swift4

问题描述

我正在运行Apple iOS11 示例向Apple Music添加内容Version 9.0 beta 3 (9M174d)上的a>.

I'm running the Apple iOS11 example Adding Content to Apple Music on Xcode Version 9.0 beta 3 (9M174d).

我得到一个Ambiguous use of 'play()

/adding-content-to-apple-music/AppleMusicSample/Controllers/MusicPlayerManager.swift:78:9: Ambiguous use of 'play()'

The suggested solutions to explicitly define the selector in order to avoid the ambiguity like:

let play = #selector(musicPlayerController.play)

在这种情况下不起作用.

did not work in this case.

MusicPlayerManager类中的MPMusicPlayerController实例定义为

let musicPlayerController = MPMusicPlayerController.systemMusicPlayer 

然后引用为

func beginPlayback(itemID: String) {
        musicPlayerController.setQueue(with: [itemID])

        musicPlayerController.play()
    }

我已经将MusicPlayerManager类的代码放在此处.

I have put the code for the MusicPlayerManager class here.

推荐答案

写

    (musicPlayerController as MPMediaPlayback).play()

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