March 2013
Intermediate to advanced
1000 pages
34h 51m
English
Content preview from Programming iOS 6, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Table View Menus
It is possible to display a menu from a table view cell by performing a long press on the cell. A menu, in iOS, is a sort of balloon containing tappable words such as Copy, Cut, and Paste. And as far as I can tell, those are the only words you’ll be including in a table view cell’s menu; I tried to customize the menu to include other terms, but I failed.
To allow the user to display a menu from a table view’s cells, you implement three delegate methods:
-
tableView:shouldShowMenuForRowAtIndexPath: - Return YES if the user is to be permitted to summon a menu by performing a long press on this cell.
-
tableView:canPerformAction:forRowAtIndexPath:withSender: -
You’ll be called repeatedly with a bunch of selectors for various actions that the system knows about, but as far as I can tell, the only ones worth responding YES to are
cut:,copy:, andpaste:. Whichever ones you respond YES to will appear in the menu; returning YES, regardless, causes all three menu items to appear in the menu. The menu will now appear unless you return NO to all three actions. The sender is the shared UIMenuController, which I’ll discuss more in Chapter 23 and Chapter 39. -
tableView:performAction:forRowAtIndexPath:withSender: - The user has tapped one of the menu items; your job is to respond to it somehow.
Here’s an example where the user can summon a Copy menu from any cell (Figure 21-10):
- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath { return ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.