How to populate a TableView with an Array of Objects?

Question

I have a TableView Controller that I want to populate with Objects from an array. I am using StoryBoard. Also, I am not sure if I need to place Labels in the Cell Prototype in storyboard as a type of placeholder?

My aList Mutable Array contains objects of type Homework. In each row of the table, I want to display (These are variables already set in my Homework Model):

-ClassName

-AssignmentTitle

-DueDate

Here is what I currently have

TableViewController.h

@interface AssignmentTableController : UITableViewController
<
AssignmentDelegate
>

@property(strong,nonatomic) Assignment *vc;
@property (strong, nonatomic) NSMutableArray *alist;//array was filled with delegation 


@end

TableViewController.m

#pragma mark - Table view data source

- (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 [self.alist count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier     forIndexPath:indexPath];
Homework *ai = [self.alist objectAtIndex:indexPath.row];

//*******I am not sure what to do from Here******
//*******I need to start displaying 1 object per row,displaying what was stated above***

  // Configure the cell...

return cell;
}

possible duplicate of Populating a UITableView from arrays

Grady Player
– Grady Player

2013-10-23 02:08:45 +00:00
Commented Oct 23, 2013 at 2:08 — Grady Player
– Grady Player, Commented Oct 23, 2013 at 2:08

faterpig · Accepted Answer · 2013-10-23 02:08:36Z

I have a similar implementation.

Implementation: I created the following methods. (I have edited them to fit your code provided.)

-(Homework*) homeworkAtIndex: (NSInteger) index
{
    return [alist objectAtIndex:index] ;
}

-(NSInteger) numberOfObjectsInList
{
    return [alist count];
}

And in the UITableViewController delegate method:

- (NSInteger) tableView: (UITableView*) tableView numberOfRowsInSection: (NSInteger) section

I used this method call

return [self numberOfObjectsInList];

In the delegate method:

- (UITableViewCell*) tableView: (UITableView*) tableView cellForRowAtIndexPath: (NSIndexPath*) indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:SubtitleIdentifier] autorelease];
    Homework *ai = [self homeworkAtIndex: indexPath.row];

    /* your other cell configurations
    cell.textLabel.text = ai.className; // eg. display name of text
    cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ | %@",ai.assignmentTitle,ai.dueDate]; // will show the cell with a detail text of "assignment title | due date" eg. "Lab 1 | 23 Oct 2013" appearing under the className called "Physics"
    */
}

Using the method homeworkAtIndex will allow you to populate the different objects in the array into the different cells in the table.

This way got me through having to create custom cells and formatting the cell sizes to fit the table. Maybe this can work for you if the data that is going to be shown is not that long, and does not really have to use the custom cells. (Much like the example I provided)

If you were wondering how to check for different cells selected (as you may wish to push them to a different viewController thereafter), you can do this in the delegate method:

- (void) tableView: (UITableView*) tableView didSelectRowAtIndexPath: (NSIndexPath*) indexPath
{
    UIViewController* nextViewController = nil;
    NSString* cellDisplayName = [delegate homeworkAtIndex: indexPath.row].name; // can be the Homework object if you want
    if( [cellDisplayName isEqualToString:[self homeworkAtIndex:0].className] )
        nextViewController = [[firstViewController alloc] init];
    else if( [cellDisplayName isEqualToString:[self homeworkAtIndex:1].className] )
        nextViewController = [[secondViewController alloc] init];
    // goes on for the check depending on the number of items in the array
}

I am using NSString here to check for the className as I'm not sure what the Homework object is, but you can definitely change the logic to fit the Homework object, as my guess is you may have different objects with the same className variable.

Hope this helps! :)

Obj-Swift · Accepted Answer · 2013-10-22 22:08:07Z

3

There are Plenty of tutorials out there which populates tableviews using arrays. Take a look at these tutorials.

http://www.appcoda.com/ios-programming-tutorial-create-a-simple-table-view-app/

http://www.raywenderlich.com/1797/ios-tutorial-how-to-create-a-simple-iphone-app-part-1

you will need to implement custom cell to accommodate 3 labels.. default table cells usually have 1 image view and two labels..

edited Oct 22, 2013 at 22:08

answered Oct 22, 2013 at 22:02

Obj-Swift

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Comments

manuelBetancurt · Accepted Answer · 2013-10-22 22:01:48Z

0

use a custom cell

http://www.appcoda.com/customize-table-view-cells-for-uitableview/

use the cell as a view, just position your labels on the content view of the cell[1] I see you already have the object with the data you want to display, so use a cell with the things you want to show

answered Oct 22, 2013 at 22:01

manuelBetancurt

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