Objective-C 中的神秘 SQLite 控制台输出

Question

当运行我的程序来查询 iPhone 的 iPod 库时，我在控制台中得到以下输出：

CPSqliteStatementPerform: attempts to write a readonly database for UPDATE ddd.ext_container SET orig_date_modified = (SELECT date_modified FROM container WHERE pid=container_pid) WHERE orig_date_modified =0

我已经禁用了输出到控制台的所有内容，因此我并没有遇到错误NSLog。这是怎么回事以及我该如何解决它。我将包括我正在调用的整个类源代码，以及执行该工作的类（很抱歉将其全部发布：

+(NSMutableDictionary *) makeQuery {

MPMediaQuery *query = [[MPMediaQuery alloc] init]; //query iPod library
NSString *facebookIDKey = @"Facebook ID";
NSString *genericFacebookID = @"1234567890";
NSMutableDictionary *organizedSongData = [NSMutableDictionary dictionaryWithObject:genericFacebookID forKey:facebookIDKey];
NSArray *allSongs = [query collections];

//only add those songs which have not
//been played since last login
for (MPMediaItem *recent in allSongs) {
    NSDate *lastPlayed = [recent valueForProperty:MPMediaItemPropertyLastPlayedDate];
    int songCounter = 1;
    BOOL uploadInfo = [[PlayedSinceLastLogin alloc] initWithLastPlayedDateOfSong:lastPlayed];
    if (uploadInfo == YES) {
        //adds songs into
        [organizedSongData addEntriesFromDictionary: [MakeDicForSongInfo initWithMPMediaItem:recent andSongNumber:songCounter]];
        songCounter++;
    }
}

return organizedSongData;
}

这是工作的实际主要内容，在 MakeDicForSongInfo 中完成：

+(NSDictionary *) initWithMPMediaItem:(MPMediaItem *) song andSongNumber: (int)songCount{


//Create & initialize NSStrings for keys
//Create NSArray to hold keys

NSString *songKey = [NSString stringWithFormat: @"%i Song Title", songCount];
NSString *albumKey = [NSString stringWithFormat: @"%i Album", songCount];
NSString *artistKey = [NSString stringWithFormat: @"%i Artist", songCount];
NSString *artistIDKey = [NSString stringWithFormat: @"%i Artist Persistent ID", songCount];
NSString *lastPlayedKey = [NSString stringWithFormat: @"%i Late Played Date", songCount];
NSString *genreKey = [NSString stringWithFormat: @"%i Genre", songCount];
NSString *ratingKey = [NSString stringWithFormat: @"%i User Rating", songCount];
NSString *playCountKey = [NSString stringWithFormat: @"%i Play Count", songCount];

NSArray *propertyKeys = [[NSArray alloc] initWithObjects:songKey, albumKey, artistKey, artistIDKey, 
                        lastPlayedKey, genreKey, ratingKey, playCountKey, nil];

//Create & initialize NSStrings to hold song property information
//Create NSArray to hold the values

NSString *songTitle = [song valueForProperty:MPMediaItemPropertyTitle];
NSString *albumName = [song valueForProperty:MPMediaItemPropertyAlbumTitle];
NSString *artistName = [song valueForProperty:MPMediaItemPropertyArtist];
NSString *artistID = [song valueForProperty:MPMediaItemPropertyArtistPersistentID];
NSString *lastPlayed = [song valueForProperty:MPMediaItemPropertyLastPlayedDate];
NSString *genre = [song valueForProperty:MPMediaItemPropertyGenre];
NSString *userRating = [song valueForProperty:MPMediaItemPropertyRating];
NSString *playCount = [song valueForProperty:MPMediaItemPropertyPlayCount];

NSArray *propertyValues = [[NSArray alloc] initWithObjects:songTitle, albumName, artistName, artistID, 
                           lastPlayed, genre, userRating, playCount, nil];

//Create NSDictionary to store information, initializing it with
//above data, then returning the resulting dictionary

NSDictionary *songInfo = [[NSDictionary alloc] initWithObjects:propertyValues forKeys:propertyKeys];

return songInfo;
}

它可能是访问所有内容的东西吗？那些吓坏 iPhone 的媒体信息？

Answer 1

显然，这是 iOS 4.3 中的一个错误，已在 Apple 的开发论坛中解决：

https://devforums。 apple.com/message/428584#428584