Question

我在sqlite包装器方法中有问题..我已经定义了以下函数及其显示错误..我无法解决它。所有我试图这样做交换数据库中的行。它只在sqlite管理器（firefox插件）中使用，只有sql语句。但在这里它显示一个错误，所以我假设我已经定义了函数的方式可能是错误的..有人可以对这个问题稍微说清楚，所以它有帮助吗？

提前感谢

//这就是我在DB中定义函数的方法

-(NSMutableArray*)extractActivitytest:(int)pri
{
    [db beginTransaction];
NSString* tSqlString = [NSString stringWithFormat:@"select Activity_Name from Activity where Priority = %d", pri];
FMResultSet *tRecordSet = (FMResultSet*)[db executeQuery:tSqlString];
NSMutableArray *rowArray = [[NSMutableArray alloc] init];
   while ([tRecordSet next])
{

    [rowArray addObject:[tRecordSet stringForColumn:COLUMN_ACT]];

}
return [rowArray autorelease];
[db commit];

}

///这就是我的称呼方式

 [long1  setTitle:[[[DBManager getInstance]extractActivitytest:1] objectAtIndex:0]  forState:UIControlStateNormal];
[long2  setTitle:[[[DBManager getInstance]extractActivitytest:2] objectAtIndex:0]forState:UIControlStateNormal];
[long3  setTitle:[[[DBManager getInstance]extractActivitytest:3] objectAtIndex:0] forState:UIControlStateNormal];
[long4  setTitle:[[[DBManager getInstance]extractActivitytest:4] objectAtIndex:0]forState:UIControlStateNormal];
[long5  setTitle:[[[DBManager getInstance]extractActivitytest:5] objectAtIndex:0] forState:UIControlStateNormal];
[long6  setTitle:[[[DBManager getInstance]extractActivitytest:6] objectAtIndex:0] forState:UIControlStateNormal];

//这是我得到的错误

2012-01-06 14:03:20.387 MyDaily6[5657:207] Path= /Users/rega/Library/Application       Support/iPhone Simulator/4.3.2/Applications/5A554560-A01A-4F44-980E-CC200E037CFE/Documents/Goals.sqlite
2012-01-06 14:03:22.490 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
2012-01-06 14:03:22.491 MyDaily6[5657:207] DB Query: BEGIN EXCLUSIVE TRANSACTION;
2012-01-06 14:03:22.491 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic     error or missing database) SQLITE_ERROR
2012-01-06 14:03:22.492 MyDaily6[5657:207] DB Query: BEGIN EXCLUSIVE TRANSACTION;
2012-01-06 14:03:22.492 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
2012-01-06 14:03:22.493 MyDaily6[5657:207] DB Query: BEGIN EXCLUSIVE TRANSACTION;
2012-01-06 14:03:22.493 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
2012-01-06 14:03:22.494 MyDaily6[5657:207] DB Query: BEGIN EXCLUSIVE TRANSACTION;
2012-01-06 14:03:22.494 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
2012-01-06 14:03:22.495 MyDaily6[5657:207] DB Query: BEGIN EXCLUSIVE TRANSACTION;

///另一个给出相同错误的类似函数

-(void)moveupData:(int)value1:(int)value2
{
NSString *stringSQL = [NSString stringWithFormat:@" UPDATE Activity SET Priority = (CASE WHEN Priority = %d THEN %d WHEN Priority = %d THEN %d END) WHERE Priority IN (%d,%d)", value1, value2];
[db executeQuery:stringSQL];
[db commit];

} //这就是我如何调用

[[DBManager getInstance]moveupData:moveUp :moveDown];

//错误我正在

 MOVEDOWN = 42012-01-06 14:03:34.932 MyDaily6[5657:207] Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
2012-01-06 14:03:34.933 MyDaily6[5657:207] DB Query: COMMIT TRANSACTION;

Answer 1

你确定你的数据库是开放的吗？你应该打电话

[db open]

而且，对于第二部分，如果要写入数据库，则应使用

[db executeUpdate:stringSQL];

希望它有所帮助！

iphone sdk中的SQLITE错误（fmdb包装器）

1 个答案: