为什么我在xcode控制台中收到此CPSqliteStatementPerform错误 [英] Why am I getting this CPSqliteStatementPerform error in xcode console

问题描述

我在xcode控制台中遇到以下错误，但我不知道它抱怨的只读数据库是什么：

I am getting the following errors in the xcode console, but I don't know what read only data base it is complaining about:

CPSqliteStatementPerform: attempt 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
CPSqliteStatementReset: attempt 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

以下代码在错误发生之前执行：

The following code executes just prior to the error:

MPMediaQuery *myPlaylistsQuery = [MPMediaQuery playlistsQuery];
NSArray *array = [myPlaylistsQuery collections];
playlists = [[NSMutableArray alloc] init];
[playlists addObject:@"new playlist"];
NSLog(@"%@", [playlists objectAtIndex:0]);

int numPlaylists = 1;
for (MPMediaPlaylist *arrayItem in array) {
    NSLog(@"Got here");

NSLog打印'新播放列表'

The NSLog prints 'new playlist'

然后在初始化for循环后立即打印CPSqliteStatementPerform：和CPSqliteStatementReset：errors。

Then the CPSqliteStatementPerform: and the CPSqliteStatementReset: errors print immediately after the for loop is initialized.

然后NSLog打印'Got here'。

Then NSLog prints 'Got here'.

我写的是什么只读数据库，如何更正？

What read-only database am I writing and how do I correct this?

推荐答案

该设备似乎认为你正在尝试写这些地点。我正在做一个类似的项目，并在Organizer中打开我的iPhone控制台，看看发生了什么。
以下是我尝试获取MPMediaItems属性时显示的行：

The device seems to think that you are trying to write to those locations. I am doing a similar project and opened up my iPhone's console in Organizer to see what was going on. Here are the lines that show up when I try to get properties of MPMediaItems:

May 27 22:11:04 unknown sandboxd[2512] <Notice>: QueryTesting(2510) deny file-write-mode /private/var/mobile/Media/iTunes_Control/iTunes/iTunes Library.itlp/Library.itdb
May 27 22:11:04 unknown sandboxd[2512] <Notice>: QueryTesting(2510) deny file-write-data /private/var/mobile/Media/iTunes_Control/iTunes/iTunes Library.itlp/Library.itdb
May 27 22:11:04 unknown sandboxd[2512] <Notice>: QueryTesting(2510) deny file-write-data /private/var/mobile/Media/iTunes_Control/iTunes/iTunes Library.itlp/Dynamic.itdb
May 27 22:11:04 unknown sandboxd[2512] <Notice>: QueryTesting(2510) deny file-write-data /private/var/mobile/Media/iTunes_Control/iTunes/iTunes Library.itlp/Extras.itdb
May 27 22:11:04 unknown sandboxd[2512] <Notice>: QueryTesting(2510) deny file-write-data /private/var/mobile/Media/iTunes_Control/iTunes/iTunes Library.itlp/DBTemp/ddd.itdbm

即使我只是检查值是什么，它也认为我'我试图在那里写。可能的错误？

Even though I'm just checking what the values are, it thinks I'm trying to write there. Possible bug?

编辑：
这是一个错误，正如这里讨论的那样--- >> https://devforums.apple.com/message/428584#428584

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