将NSMutableArrays填充到自定义部分

Question

Want to populate two NSMutableArray s to 2 Custom Sections of tableView ;

I have two NSMutableArray s with events and I want to split them to now and today sections.

For the first section:

I want to remove events from nowEvents Array and place them into my frist section.

EventClass *event = [appDelegate.nowEvents objectAtIndex:indexPath.row];

event.startTime is the start time of my event

event.endTime is the end time of my event

For 2nd section: Remove the events that are happening now

EventClass *event = [appDelegate.todayEvents objectAtIndex:indexPath.row];

What I'd like to know is numberOfRowsInSection method, how it would look like and cellForRowAtIndexPath (here I've tried NSInteger section = [indexPath section]; if (section == 0) { } if (section == 1) {} - but what about if I won't have an event that is happening now ?)

Answer 1

You can have 1 or 2 sections in your table view depending on the case, then in your numberOfRowsInSection you check if there are any events now (if they aren't then you drop that section). So Your ifs would be something like

BOOL eventsNow = YES/NO;
if (section == 0 && eventsNow) { } 
if (section == 0 && !eventsNow) { } 
if (section == 1 && eventsNow) { }
if (section == 1 && !eventsNow) { /* This case shouldn't happen so assert or throw ...*/ }

Answer 2

Something like this should work

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
    // Return the number of rows in the section.
    switch (section) {
        case 0:
            return [appDelegate.nowEvents count];
        case 1:
            return [appDelegate.todayEvents count];    
        default:
            return 0;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }


    switch (indexPath.section) {
        case 0:
            EventClass *nowEvent = [appDelegate.nowEvents objectAtIndex:indexPath.row];
            //set up cell to display this event
            break;
        case 1:
            EventClass *todayEvent = [appDelegate.todayEvents objectAtIndex:indexPath.row];
            //set up cell to display this event
            break;    
        default:
            break;
    }

    // Configure the cell...

    return cell;
}

If you don't have an event happening now then your nowEvent array will be empty so in the numberOfRowsInSection will return 0 and therefore the cellForRowAtIndexPath won't be called as there is nothing to display. Hope this helps.