Pass a method from my custom cells class to the main class

Question

I have a custom cell. In it is a UITextField linked to customCell.m. I\'m trying to pass the text from the textField to mainVC.m

Answer 1

What you need to do is:

1. Define a protocol
2. Add a property of this protocol for your CustomCell
3. Implement the protocol in your MainVC

1. Define a protocol

We normally put the definition of the protocol in the header file (in this case CustomCell.h).

 // define the protocol for the delegate
 @protocol CustomCellDelegate 
 // define protocol functions that can be used in any class using this delegate
 -(void)customCell:(CustomCell *)customCell passText:(NSString *)text;
 @end

2. Add a property of this protocol for your CustomCell

And add this to your CustomCell between @interface CustomCell and @end.

@property (nonatomic, weak) id delegate; 

3. Implement the protocol in your MainVC

In your MainVC, implement the delegate function as the following.

@interface MainCV
@end

@implementation MainVC 
-(void)customCell:(CustomCell *)customCell passText:(NSString *)text
{
     // Do whatever you want with text here
}
@end

The following shows how you use the protocol above.

1. Set the delegate when create CustomCell in your MainCV. Something like the following,

   CustomCell *cell = ... allocation and initialization
   cell.delegate = self; // self is mainVC
   

2. Whenever you need to pass the data NSString in your customCell, call the following:

   [self.delegate customCell:self passText:self.myTextField.text]; // self is customCell