CODEWITHSUNDEEP
iphoneobjective-ccocoa-touch
trillions
trillions

Reputation: 3709

What's the exact meaning of the indexPath.section?

From Apple's documentation about the method indexPathForRow, I am not clear on when and how to use indexPath.section and I am not clear on what exactly means a 'section'. I am new to iPhone development, can someone please help me explain 'section' a little?

From UIKit’s documentation:

row

An index number identifying a row in a UITableView object in a section identified by section.

section

An index number identifying a section in a UITableView object.

Upvotes: 10

Views: 11087

Answers (5)

yoAlex5
yoAlex5

Reputation: 34401

IndexPath

It is a position(section and row) inside TableView

TableView <- Section <- Row

IndexPath {
    let section: Int 
    let row: Int 
}

Upvotes: 0

jbat100
jbat100

Reputation: 16827

The section and the row of an index path is a special case (actually an extension to NSIndexPath for UIKit, see this post). For a given NSIndexPath indexPath 

[indexPath indexAtPosition:0];

is the same as 

[indexPath section];

and 

[indexPath indexAtPosition:1];

is the same as 

[indexPath row];

This makes it more intuitive to handle paths in table views which have sections and a given number of rows for each section.

Upvotes: 1

barfoon
barfoon

Reputation: 28187

Each table has sections, and rows within that section. indexPath.row and indexPath.section reference the different parts accordingly.

Upvotes: 0

Aravindhan
Aravindhan

Reputation: 15628

enter image description here

Hope you understand what is mean by a section. I think row you already know. If you have any doubts post as a comment.

Upvotes: 15

dbgrman
dbgrman

Reputation: 5681

You can have sections of rows. There always is at least one section for a table view. You can use numberOfSections method to change this. Similarly, tableView:numberOfRowsInSection: tells how many rows are in the given section. And finally tableView:cellForRowAtIndexPath: gives the cell given the row and section. For example, in the contacts application, each alphabet is a section. Its rows are all names starting with that letter. For example "S" will have "Samuel", "Sarah". Similarly, "A" will have "Ali", "Alex". I suggest you read this thoroughly.

Upvotes: 1

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