NSViewController.view (Subviews) setTag - objective-c

Question

Each time I press a button, mainController is calling [self.view addSubview: createCustomView.view]. Everything works fine here. The problem is that I need to put a tag on each subview I create in order to retrieve them later. I've already tried this :
MainController.m
NSNumber *i;
createCustomView.view.tag = i; //readonly
And what I actually wanna do is :
int i;
[createCustomView.view setTag:i];
But the setTag method doesn't exist. My question is : Is there a way I can do this other than using identifier string which brings some problems in my case?
Thanks in advance
Here's the .h file of the Controller
#import <Foundation/Foundation.h>
#import "TransactionButtonView.h"
#class TransactionButtonController;
#interface TransactionViewController : NSViewController
{
TransactionButtonController *transactionButtonController;
}
-(IBAction)createOnPushButton:(id)sender;
-(void)recalculatePositionOnRemove:(long)tag;
#property (nonatomic,assign) TransactionButtonController *transactionButtonController;
#end
Here's the .m file of the Controller
#import "TransactionViewController.h"
#import "TransactionButtonController.h"
#import "MainController.h"
#implementation TransactionViewController
#synthesize transactionButtonController;
-(IBAction)createOnPushButton:(id)sender
{
transactionButtonController = [[TransactionButtonController alloc] initWithNibName:#"TransactionButton" bundle:nil];
NSPoint originPoint;
for (int i=1; i <= [[self.view subviews]count]; i++) {
originPoint.y = transactionButtonController.view.bounds.origin.y + self.view.bounds.size.height - transactionButtonController.view.bounds.size.height*i;
transactionButtonController.view.tag = i; // Here's the PROBLEM!!!
[[transactionButtonController view]setIdentifier:[[NSNumber numberWithInt:i]stringValue]]; //here's the not good option
}
originPoint.x = transactionButtonController.view.bounds.origin.x;
[[transactionButtonController view] setFrameOrigin:originPoint];
[self.view addSubview:transactionButtonController.view];
[transactionButtonController sendVarsToButton:#"xxx" :#"591" :5 :87456356472456];
}
-(void)recalculatePositionOnRemove:(long)tag
{
NSPoint originPoint;
for (long i = tag; i<[[self.view subviews]count]; i++) {
originPoint.y = transactionButtonController.view.bounds.origin.y +self.view.bounds.size.height - transactionButtonController.view.bounds.size.height*i;
originPoint.x = transactionButtonController.view.bounds.origin.x;
[[transactionButtonController.view viewWithTag:i+1] setFrameOrigin:originPoint];
}
}
#end

Answer 1

If you want to add a tag to a view do this:
theView.tag = 1;
To remove it:
[[myParentView viewWithTag:1] removeFromSuperview]