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

Yes u can do this with help of delegates for example,

in the custom cell, i took one button and textfield and i defined a protocol like below

//in CustomCell.h file
@class CustomCell;
@protocol CellDelegate  //protocol defination
- (void)whenDoneButtonClicked:(CustomCell *)cell; //i am passing the cell this would be the good to get whole information of a cell for example apart from properties u can get index path ..
@end


@interface CustomCell : UITableViewCell 
@property (weak, nonatomic) IBOutlet UIButton *aButton;
@property (weak, nonatomic) IBOutlet UITextField *aTextField;

@property (nonatomic, assign) id delegate; //declare a delegate 

@end

in CustomCell.m file u can do like below

// this is the button action method in the custom cell, when the 
// button tapped, this method is called in this method u are 
// calling the delegate method which is defined in the controller.
- (IBAction)buttonAction:(id)sender
 {
    //as in your case user enter the text in textfield and taps button
     if([self.delegate respondsToSelector:@selector(whenDoneButtonClicked:)]) //checking weather it is safe to call the delegate method, it is not need but some times it is necessary to check to avoid crashes
          [self.delegate whenDoneButtonClicked:self]; //pass the cell or if u want text then u can also pass text also by adding 2 or more parameters
 }  

// in the above method u are calling the delegate method by passing
// the cell (hear the self means -> current object -> nothing but cell)  
// u are calling the delegate method defined in the controller by
// passing the  "self" nothing but cell ...  

in maninVc do like below

in viewcontroller.h file

#import "CustomCell.h"
@interface ViewController : UIViewController //confirms to delegate 

@property (nonatomic, retain) IBOutlet UITableView *tableView;
//.....  rest of the properties and method 

@end

and in viewcontroller.m file

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {
     CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
     if(cell == nil)
     {
        cell = [CustomCell cell]; //initilization if it is nil 

     } 

    cell.delegate = self; //set the delegate to self 
    //...other code 
    return cell;
 } 


 //define the delegate method

 // when u are calling this method from customCell class by passing 
 // the cell->(self) hear u get the cell        
 - (void)whenDoneButtonClicked:(CustomCell *)cell
 {
    //hear u will get a cell
     NSLog(@"text is:%@",cell.aTextField.text); 
 }

Hope this helps u .. :)