我正在尝试使用可可脚本桥创建一个新的用户播放列表,但似乎无法使其工作.我到目前为止
iTunesApplication *iTunes = [SBApplication
applicationWithBundleIdentifier:@"com.apple.iTunes"];
SBElementArray *iSources = [iTunes sources];
iTunesSource *library = nil;
for (iTunesSource *source in iSources) {
if ([[source name] isEqualToString:@"Library"]) {
library = source;
break;
}
}
// Could not find the itunes library
if (!library) {
NSLog(@"Could not connect to the iTunes library");
return;
}
// Now look for our playlist
Nsstring *playlistName = @"new playlist";
SBElementArray *playlists = [library userPlaylists];
iTunesUserPlaylist *playlist = nil;
for (iTunesUserPlaylist *thisList in playlists) {
if ([[thisList name] isEqualToString:playlistName]) {
playlist = thisList;
break;
}
}
// if the playlist was not found,create it
if (!playlist) {
playlist = [[[iTunes classForScriptingClass:@"playlist"] alloc] init];
;
[[library userPlaylists] insertObject:playlist atIndex:0];
}
当我尝试添加播放列表的名称时,我收到错误消息：
iTunesBridge[630:80f] *** -[SBProxyByClass setName:]: object has not been added to a container yet; selector not recognized
任何人都可以指向正确的方向吗？
解决方法
错误消息告诉您,像播放列表之类的Scripting Bridge对象在添加到相关的SBElementArray之前无法接收消息,因此在将播放列表添加到数组之前尝试设置属性失败.
最简单的解决方案是重新排列最后两行代码,如下所示：
// if the playlist was not found,create it
if (!playlist) {
playlist = [[[iTunes classForScriptingClass:@"playlist"] alloc] init];
[[library userPlaylists] insertObject:playlist atIndex:0];
;
}
另一个选择是使用initWithProperties：根据你对另一个答案的评论是你最终做的.