NSMutableArray addObject from sqlite database not working - ios

Question

I have an NSMutableArray that I want to populate with an sqlite database and display the data in a table view. The app builds and shows "database opened" in the console but just shows an empty tableview, I had it working perfectly but suddenly it seems to have stopped working. here is the code for adding the data to the array:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize entries;
- (void)viewDidLoad
{
[super viewDidLoad];
//[entries addObject:#"object1"];
//[entries addObject:#"object2"];
//[entries addObject:#"object3"];
//[entries addObject:#"object4"];
[self openDB];
entries = [[NSMutableArray alloc] init];
NSString *sql = [NSString stringWithFormat:#"SELECT * FROM speakers ORDER BY name"];
sqlite3_stmt *statement;
if(sqlite3_prepare_v2(db, [sql UTF8String], -1, &statement, nil)==SQLITE_OK)
{
while (sqlite3_step(statement)==SQLITE_ROW) {
char *field2 = (char *) sqlite3_column_text(statement,1);
NSString *field2Str = [[NSString alloc]initWithUTF8String:field2];
NSString *str = [[NSString alloc]initWithFormat:#"%#", field2Str];
[entries addObject:str ];
}
}
}
//file path to db
-(NSString *) filePath {
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
return [[paths objectAtIndex:0] stringByAppendingPathComponent:#"speakerdb.sqlite"];
}
//open the db
-(void)openDB {
if (sqlite3_open([[self filePath] UTF8String], &db) != SQLITE_OK){
sqlite3_close(db);
NSAssert(0,#"error preparing statement: %s", sqlite3_errmsg(db));
}else{
NSLog(#"database opened");
}
}
The NSMutableArray is defined in the header file as follows:
#import <UIKit/UIKit.h>
#import "sqlite3.h"
#import "speakerViewController.h"
#interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>{
IBOutlet UITableView *theTable;
sqlite3 *db;
}
#property (nonatomic,retain) NSMutableArray *entries;
#end
Here is the code for adding the data to the table view:
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView
{
//return the number of sections.
return 1;
}
-(NSInteger)tableView:(UITableView *) tableView numberOfRowsInSection:(NSInteger)section
{
//Return the number of rows in the section
return [entries count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
//Congigure the cell...
cell.textLabel.text = [entries objectAtIndex:indexPath.row];
return cell;
}
The data shows in the table view if I add objects to the array manually (commented out lines shown in the viewDidLoad method) but doesnt seem to work from the sqlite database.
Any help would be much appreciated.
Edit: I'm using xcode 5.1.1

Answer 1

Try to debug your code... Put a break point on NSString *field2Str = [[NSString alloc]initWithUTF8String:field2]; row, and check that field2 is not empty...
try to open db like this:
NSString *sqLiteDb = [[NSBundle mainBundle] pathForResource:#"speakerdb"
ofType:#"sqlite"];
if (sqlite3_open([sqLiteDb UTF8String], &_database) != SQLITE_OK) {
NSLog(#"Failed to open database!");
}
And one thing is missing from your code:
sqlite3_finalize(statement);
use it like this:
if(sqlite3_prepare_v2(db, [sql UTF8String], -1, &statement, nil)==SQLITE_OK)
{
while (sqlite3_step(statement)==SQLITE_ROW) {
char *field2 = (char *) sqlite3_column_text(statement,1);
NSString *field2Str = [[NSString alloc]initWithUTF8String:field2];
NSString *str = [[NSString alloc]initWithFormat:#"%#", field2Str];
[entries addObject:str ];
}
sqlite3_finalize(statement);
}