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我有下面的代碼段來更新Firefox擴展源碼數據庫無法更新火狐SQLite數據庫時Firefox是磨合的MacOS
NSString * profileFolderPath = [[ @"~" stringByExpandingTildeInPath] stringByAppendingPathComponent:@"/Library/Application Support/Firefox/Profiles"];
NSString *sqlitePath = [pathToProfileFolder stringByAppendingPathComponent:@"extensions.sqlite"];
int rc = sqlite3_open([sqlitePath UTF8String], &db);
if(rc)
{
NSLog(@"enable extension :%@\n",[NSString stringWithCString:sqlite3_errmsg(db)]);
sqlite3_close(db);
return NO;
}
else {
NSLog(@"opened entensions db successfully \n");
}
// check the values for active and userDisabled fields
rc = sqlite3_exec(db,"SELECT active,userDisabled FROM addon where id='myId.com'",sqliteCallback,0,&zErrMsg);
if (rc!=SQLITE_OK) {
NSLog(@"error quering the entensions database :%@\n",[NSString stringWithCString:zErrMsg]);
if(zErrMsg)
sqlite3_free(zErrMsg);
sqlite3_close(db);
return NO;
// handle error
}
當Firefox應用程序不在運行狀態,我可以讀出的值並且還更新數據庫,但是當firefox運行時,我無法從數據庫中讀取值,因爲sqlite3_exec語句返回值5,並且我可以在控制檯中看到錯誤:「error quering the extensions database:database is locked 」。
如何解決此問題。請幫助。