"unrecognized selector sent to instance" when retrieving a sqlite data

I have been getting this error and have no idea how to fix it. I am a newbie for iOS programming.

Hope the codes below is enough to see what the problem is.

Here is my ListTableController.m

...
@implementation ListTableController

@synthesize listTableView;
@synthesize detailController;
@synthesize listOfTasks;
@synthesize title, note, date;

-(id)initWithTitle:(NSString *)sTitle note:(NSString *)sNote date:(NSString *)sDate {
    NSLog(@"FUNC: %s",__FUNCTION__);
    self.title = sTitle;
    self.note = sNote;
    self.date = sDate;
    return self;
}

// Retrieve records
-(void) getAllRowsFromTableNamed: (NSString *) tableName { 

    //---retrieve rows--- 
    NSString *qsql = [NSString stringWithFormat:@"SELECT 开发者_如何学JAVA* FROM %@ WHERE status = '1' ORDER BY date ASC",tableName]; sqlite3_stmt *statement;
    //---initialize the array--- 
    listOfTasks = [[NSMutableArray alloc] init];

    if (sqlite3_prepare_v2( db, [qsql UTF8String], -1, &statement, nil) == SQLITE_OK) { 
        while (sqlite3_step(statement) == SQLITE_ROW) {
            NSString *fieldTitle = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 1)];
            NSString *fieldNote = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 2)];
            NSString *fieldDate = [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement, 3)];

            // Create a new object with the data from the database
            NSString *str = [[NSString alloc] initWithTitle :fieldTitle note:fieldNote date:fieldDate];
            [listOfTasks addObject:str];            
            [str release];
            [fieldTitle release]; 
            [fieldNote release]; 
            [fieldDate release];        
        }
        //---deletes the compiled statement from memory---
        sqlite3_finalize(statement);
    }
}
...

Here is my ListTableController.h

#import 
#import "sqlite3.h"
#import "TaskDetailController.h"

@interface ListTableController : UITableViewController {
    IBOutlet UITableView *listTableView;
    sqlite3 *db;
    TaskDetailController *detailController;

}
NSString *title;
NSString *note;
NSString *date;
NSMutableArray * listOfTasks;
@property (nonatomic, retain) NSString *title;
@property (nonatomic, retain) NSString *note;
@property (nonatomic, retain) NSString *date;
@property (nonatomic, retain) TaskDetailController *detailController;
@property (nonatomic, retain) IBOutlet UITableView *listTableView;
@property (nonatomic, retain) NSMutableArray *listOfTasks;

-(void) copyDatabaseIfNeeded;
-(NSString *) filePath; 
-(IBAction)addCalendar;
-(NSInteger)countToday;
-(id)initWithTitle:(NSString *)sTitle note:(NSString *)sNote date:(NSString *)sDate;

@end

And this is the error log from the console:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSPlaceholderString initWithTitle:note:date:]: unrecognized selector sent to instance 0x4e00470'

Try removing these lines. Class methods as [NSString stringWith.... returns autoreleased objects.

[fieldTitle release]; 
[fieldNote release]; 
[fieldDate release]; 

I think you have to learn about memory management first. You will get a big headache if you don't.

Try removing these lines.

[fieldTitle release]; [fieldNote release]; [fieldDate release];

And if you want to combine title , note , and date as a single line.

then try this

// Create a new object with the data from the database NSString *str = [[NSString stringWithFormate:@"%@ %@ %@",fieldTitle,fieldNote,fieldDate];

instead of

// Create a new object with the data from the database NSString *str = [[NSString alloc] initWithTitle :fieldTitle note:fieldNote date:fieldDate];