FMDB数据库和xcode插入数据库

时间:2012-08-24 14:03:46

标签: objective-c insert fmdb nsinteger

我正在尝试将数据插入数据库,但我觉得它不会插入整数值,而是输入字符串。该应用程序崩溃。

如果我按下将其保存到数据库中的按钮,文本字段为空,则方法会将数据插入数据库,但是值为0,因此该方法可以正常工作。

我使用的方法是:

-(BOOL) insertIntoDatabase: (NSInteger)day: (NSInteger)month:(NSInteger)year:(NSInteger)hours:(NSInteger)minutes:(NSInteger)salary:(NSString *)extra
{
    FMDatabase *dbHandler = [FMDatabase databaseWithPath: [Utility getDatabasePath]];
    BOOL success;
    @try {
        [dbHandler open];

        success =  [dbHandler executeUpdate:@"INSERT INTO inputs (day, month, year, hours, minutes, salary, extra) VALUES (?,?,?,?,?,?,?);",
                         day, month, year, hours, minutes, salary, extra];

        [dbHandler close];
    }
    @catch (NSException *exception) {
        NSLog(@"error..");
    }
    @finally {
        return success;
    }
}

这是我从viewController类调用的方法

-(IBAction)enterToDatabase:(id)sender{

    InputClassDatabaseHandler *databaseMethods = [[InputClassDatabaseHandler alloc]init];
    BOOL accept;

    NSInteger day = [_day.text integerValue];
    NSInteger month= [_month.text integerValue];
    NSInteger year= [_year.text integerValue];
    NSInteger hours= [_hours.text integerValue];
    NSInteger minutes= [_minutes.text integerValue];
    NSInteger salary= [_salary.text integerValue];

    //hardcoded for testing...
    NSString *extraWork = @"No";

    accept = [databaseMethods insertIntoDatabase:day :month :year :hours :minutes :salary :extraWork ];
}

1 个答案:

答案 0 :(得分:1)

始终记住将任何参数传递给SQL查询作为对象。 NSInteger不是一个对象,所以把它放在NSNumber对象中它会正常工作。

这应该适合你:

-(BOOL) insertIntoDatabase: (NSInteger)day: (NSInteger)month:(NSInteger)year:
(NSInteger)hours:(NSInteger)minutes:(NSInteger)salary:(NSString *)extra
{

 FMDatabase *dbHandler = [FMDatabase databaseWithPath: [Utility getDatabasePath]];
 BOOL success = NO;
 if(![db open])
 {
   NSLog(@"Error");
   return NO;
 }
 [dbHandler beginTransaction];
 success =  [dbHandler executeUpdate:@"INSERT INTO inputs (day, month, year, hours, minutes, salary, extra) VALUES (?,?,?,?,?,?,?);",
                     [NSNumber numberWithInt:day], [NSNumber numberWithInt:month], 
                     [NSNumber numberWithInt:year], [NSNumber numberWithInt:hours],  
                     [NSNumber numberWithInt:minutes], [NSNumber numberWithInt:salary],          
                     [NSNumber numberWithInt:extra] ];

    [dbHandler commit];
    [dbHandler close];

 return success;
}