Possible Duplicate:
Pass two integers as one integer
Will this work in Objective-C?
Pass two integers as one integer
If so, how do I do it with NSInteger?
I'm asking because I want to calculate a unique NSInteger tag from the NSUIntegers row & section of a UITableView?
See, I'm dealing with a UITableViewController that has three sections, which each have multiple rows. Every row has a UISwitch, and each UISwitch is linked to the same target-action method, switchAction:.
In switchAction:, my plan is to inspect the sender's tag to figure out the UISwitch's NSIndexPath (section & row) of the UITableView.
So, I want two methods like:
+ (NSInteger)integerFromInteger1:(NSInteger)int1 integer2:(NSInteger)int2;
+ (NSIndexPath *)indexPathFromInteger:(NSInteger)integer;
The first method may work better written in C. That works too if you prefer.
Rather than messing around with bit-shifting, try this:
First, find the UITableViewCell containing the UISwitch. If you have a custom UITableViewCell subclass, just direct the UISwitch's target/action to a method on the cell that contains it. If you are using a stock UITableViewCell, you could find the UITableViewCell containing the UISwitch by calling superview in a loop.
Once you have the UITableViewCell, call a method on your view controller (or whatever has access to the UITableView) and you can call UITableView's indexPathForCell: method to get an NSIndexPath object with the section and row.
According to How to convert An NSInteger to an int?, NSInteger will always be at least 32 bits on every system/architecture, so yes, the answers to Pass two integers as one integer will work.
Based on @benzado's answer, I came up with a beautiful solution for how to get the index path of the UISwitch that sent the switchAction: message.
- (void)switchAction:(id)sender {
UISwitch *onOff = (UISwitch *)sender;
NSIndexPath *indexPath = [self.tableView indexPathForCell:
(UITableViewCell *)[onOff superview]];
// carry on...
}
No tags necessary. Just keep your pants on.
