objective c - pass array of objects to table view - objective-c

Question

i need to pass array of class objects
i have class called Student , it has some properties (name , code , account_type ....);
i call method in database to get all students object
Student_array = [data_base_helper selectAllStudents];
i need to show list of student names in table view, i made anther array called names
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [Student_array count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString * cell_identifer = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cell_identifer forIndexPath:indexPath];
// Configure the cell...
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cell_identifer];
}
for(Student * st in student_array){
[self.names addObject:st.student_name];
}
cell.textLabel.text = [names objectAtIndex:indexPath.row ];
return cell;
}
i find some problem with delete as i delete by index idea how to pass array of objects in table view

Answer 1

The idea is that you don't need to use an "array of names", you can just use your Students array directly, in this way:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [Student_array count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString * cell_identifer = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cell_identifer forIndexPath:indexPath];
// Configure the cell...
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cell_identifer];
}
Student *student = Student_array[indexPath.row];
cell.textLabel.text = student.student_name;
return cell;
}
When you'll need to delete a student from the tableView, you can easily remove from the array and then update the tableView accordingly, something like that:
[Student_array removeObjectAtIndex:indexPath.row];
[self.tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
Note that in the code above I'm assuming that you want to delete the object at the given indexPath.row and that Student_array is a NSMutableArray and not a NSArray
ps: you may want to rename Student_array in students since in objective-c it's not a good practice to name objects with a capital letter, nor to use underscores. Likely I would also rename student_name in name since student is just a repetition of the type of the object.

Answer 2

When You Deleted a cell from table delete items for both array Student_array and self.name array corresponding the deleted cell.