Array concatenation

Question

I have a table view with 3 rows, if I select the first row , the item on the first row get saved in a array variable say arrdata , similarly when I select 2nd and 3rd row , I want it to get saved in the same variable arrData.

Answer 1

You can use NSMutableArray.

For Ex.

NSMutableArray *arrData = [[NSMutableArray alloc] init];

Now, select the first row from table view

Use [arrData addObject:[first row data]];

For 2nd from table view

Use [arrData addObject:[2nd row data]];

For 3rd from table view

Use [arrData addObject:[3rd row data]];

And you can also add some condition for add data in to arrData, like if 1st row data is added then do't re-add it.

For Ex. When you select 1st row you can add 1, 2nd selection add 2, 3rd selection add 3 like [arrData addObject:@"1"]; etc.

Now, If you want to get data from arrData,

If (arrData.count > 0)
{
    NSString *fData = [arrData objectAtIndex:0]; // Here you get stored data from 1st selected row of table.
}

Answer 2

Create an nsmutable array and add objects by using method addobject

NSMutableArray *arrData =[[NSMutableArray alloc]ini];

On Tableselection method , add the following line

[arrdata addObject:your object];