在我的IOS应用程序中，我如何打开创建一个sqlite3数据库，我可以在整个程序中使用

Question

我正在尝试这样做:

sqlite3 *db;
self.dbPath = "tasks.sqlite";
int result = sqlite3_open(self.dbPath, &db);

后面的代码抛出错误。所以我怀疑它不起作用。我应该传递什么作为路径?

Answer 1

NSString *strDatabaseName;
NSString *strDatabasePath;
-(void)getDatabase 
{
strDatabaseName = @"questionsdb.sqlite";    
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
strDatabasePath = [documentsDir stringByAppendingPathComponent:strDatabaseName];
}
-(BOOL) checkAndCreateDatabase {
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
success = [fileManager fileExistsAtPath:strDatabasePath];
if(success) {
    return TRUE;
}
else {
    NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:strDatabaseName];
    [fileManager copyItemAtPath:databasePathFromApp toPath:strDatabasePath error:nil];
}
return FALSE;
}

then from any method

sqlite3 *database;
if(sqlite3_open([strDatabasePath UTF8String], &database) == SQLITE_OK) 
{
//doSomething
}

我希望它对你也有用。谢谢你。