How to access objects inside an array object - ios

Question

I am creating an application for IOS and am struggling with accessing an object inside an array i have made for display on the table view cell.
This is the code i have used to add the object to the array every time the loop cycles through.
for (int i = 0; i < [parsedArray count]; i++) {
HPTBusStops *busStops = [[HPTBusStops alloc] init];
NSArray *informationArray = [parsedArray objectAtIndex:i];
busStops.busStopNumber = [informationArray objectAtIndex:0];
busStops.busStopName = [informationArray objectAtIndex:1];
busStops.latitude = [informationArray objectAtIndex:2];
busStops.longitude = [informationArray objectAtIndex:3];
[self.busStopsHolder addObject:busStops];
}
The HPTBusStops class is obviously custom, and later in the master view controller, i am tring to re-access these properties through the busStopsHolder array, when programming the cell, in this part:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
HPTBusStopsTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"BusStopCell" forIndexPath:indexPath];
return cell;
}
I am honestly very unsure of how to access the busStops object's properties through the busStopHolder's array.
Any help would be appreciated
Thanks
Hamish

Answer 1

It looks to me like you might have an issue with scope...
You'll need to make "busStopsHolder" a #property of the class containing the for loop and instantiate that class as an instance variable in your Master View Controller.
in your class, say MyInfoClass.h:
#property (strong, nonatomic) NSMutableArray *busStopsHolder;
in MyInfoClass.m:
synthesize busStopsHolder;
Make sure you have initialized your busStopsHolder array in MyInfoClass...
(id) init {
busStopsHolder = [[NSMutableArray alloc] init];
}
Then in your master view controller .h:
#import "MyInfoClass.h"
#interface myMastserViewController : UIViewController {
MyInfoClass *infoClass;
}
Then...
- (void) viewDidLoad {
infoClass = [[MyInfoClass alloc] init];
[infoClass methodToLoadBusStops];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
HPTBusStopsTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"BusStopCell" forIndexPath:indexPath];
HPTBusStop *busStop = [[infoClass busStopsHolder] objectAtIndex:indexPath.row];
[[cell textLabel] setText:[busStop busStopName]]
return cell;
}

Answer 2

An oversimplified way to do this is as follows:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
HPTBusStopsTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"BusStopCell" forIndexPath:indexPath];
HPTBusStops *busStops = yourSourceArray[indexPath.row];
cell.textLabel.text = busStops.name;
return cell;
}
If your tableView has one section, you can use the tableView's indexPath.row property to determine which index you're dealing with, use that as the index to access the relevant object in your source array, and then customize the cell based on the specific object at that index. In the example code I just assumed there was a name property on the busStops object for example purposes.
Make sure in your numberOfRowsInSection method you set the number of rows as the number of objects in your source array, whatever that is.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return yourSourceArray.count;
}