使用cocoalibspotify播放时崩溃: 问题看起来像在SPSession.m下的回调函数music_delivery()中,实例启动的回调不是SPSessionAudioDeliveryDelegate兼容的实例。但是,我们使用的唯一回放相关实例是SPPlaybackManager。我们用spotify播放歌曲的功能是:
#pragma mark - Domain function
- (void)searchForKeywords:(NSString *)keywords{
//construct search string
SPSearch *search = [[SPSearch alloc] initWithSearchQuery:keywords inSession:[SPSession sharedSession]];
//search track
[SPAsyncLoading waitUntilLoaded:search timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *results, NSArray *notLoadedResults) {
if ([results count]>0) {
//search returns results.
SPSearch *thisSearch = [results objectAtIndex:0];
if ([[thisSearch tracks] count]>0) {
// Add loading flag for album art
[[ImageManager sharedInstance] setLoadingFlagForSong:self.namedSong];
SPTrack *track = [[thisSearch tracks]objectAtIndex:0];
[SPAsyncLoading waitUntilLoaded:track timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *tracks, NSArray *notLoadedTracks) {
self.currentTrack = track;
}];
}else{
}
}else{
//search didn't return results.
}
}];
}
- (void)play
{
[SPSession dispatchToLibSpotifyThread:^{
[[SPSession sharedSession]setPlaybackDelegate:self];
// Change the current track of the session
if (currentTrack) {
self.playbackManager = [[SPPlaybackManager alloc] initWithPlaybackSession:[SPSession sharedSession]];
[[SPSession sharedSession]setPlaybackDelegate:self];
[self.playbackManager playTrack:currentTrack callback:^(NSError *error) {
// Failure playing
if (error) {
}
// Success
}];
}
// Play
else {
}
}];
}
- (void)pause
{
[SPSession dispatchToLibSpotifyThread:^{
[SpotifyHelper sharedInstance].playbackManager.isPlaying = NO;
} waitUntilDone:YES];
}
- (void)stop
{
[SPSession dispatchToLibSpotifyThread:^{
[SpotifyHelper sharedInstance].playbackManager.isPlaying = NO;
[[SpotifyHelper sharedInstance].playbackManager sessionDidEndPlayback:[SPSession sharedSession]];
} waitUntilDone:YES];
}
-(void)seekToLocation:(float)location
{
[SPSession dispatchToLibSpotifyThread:^{
[[SpotifyHelper sharedInstance].playbackManager seekToTrackPosition:location * self.currentTrack.duration];
} waitUntilDone:YES];
}
错误讯息: - [__ NSCFType session:shouldDeliverAudioFrames:ofCount:streamDescription:]:无法识别的选择器发送到实例0x21328a90
Stack:
0 libsystem_kernel.dylib __pthread_kill + 8
1 libsystem_c.dylib pthread_kill + 58
2 libsystem_c.dylib abort + 94
3 libc++abi.dylib abort_message + 74
4 libc++abi.dylib default_terminate() + 24
5 libobjc.A.dylib _objc_terminate() + 146
6 libc++abi.dylib safe_handler_caller(void (*)()) + 78
7 libc++abi.dylib std::terminate() + 19
8 libc++abi.dylib __cxa_throw + 122
9 libobjc.A.dylib objc_exception_throw + 94
10 CoreFoundation __methodDescriptionForSelector
11 CoreFoundation ___forwarding___ + 392
12 CoreFoundation _CF_forwarding_prep_0 + 24
crash->13 OURAPP music_delivery
14 OURAPP sp_playlist_get_offline_download_completed
15 OURAPP sp_error_message
16 OURAPP sp_error_message
答案 0 :(得分:2)
两件事:
1)调用CocoaLibSpotify方法时不要调度到CocoaLibSpotify线程 - 这是在内部完成的。删除dispatchToLibSpotifyThread
行。
2)删除[[SPSession sharedSession]setPlaybackDelegate:self];
行。这就是造成你的崩溃的原因。