I am trying to pass data back from one TabBarViewController to my MasterViewController however when tyring to pass data back to the MasterViewController the method from my protocol/Delegate never gets accessed.
This is what I have done - I have a TabBarViewcontroller and a MasterViewController, the TabBarController is added to the MasterViewController as a subview... what I am trying to do is then load another subview onto the MasterViewController which I plan to do when a tabbarbutton is selected in the tabBarViewController i call my protocol/delegate method. for this I am using the following code. (I hope this makes sense so far)
TabBarViewController.h
@class MasterViewController;
@protocol LoadActionView <NSObject>
@required
- (void) loadViewsAction;
@end
@interface TabBarViewController : UIViewController <UITabBarDelegate> {
__weak id <LoadActionView> delegate;
//..
}
@property (weak, nonatomic) id delegate;
//..
TabBarViewController.m
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
switch (item.tag) {
case 0:
{
NSLog(@"item 1 selected");
[[self delegate] loadViewsAction]; //the thread defiantly makes it here as I have debugged to this point
}
//..
then, MasterViewController.h
#import <UIKit/UIKit.h>
#import "TabBarViewController.h"
@interface MasterViewController : UIViewController <UINavigationControllerDelegate, LoadActionView> {
TabBarViewController *tbVC;
}
@property (nonatomic, strong) TabBarViewController *tbVC;
//..
MasterViewController.m
#import "TabBarViewController.h"
@synthesize tbVC;
//..
- (void) viewDidLoad {
//..
tbVC = [[TabBarViewController alloc] initWithNibName:@"TabBarViewController" bundle:[NSBundle mainBundle]];
UIView *tbView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 367.0, 320.0, 49.0)];
[tbView addSubview:tbVC.view];
[otherNav.view addSubview:tbView];
}
- (void) loadViewsAction
{
NSLog(@"HITME!"); //threads not making it here.
}
the only thing different form what I normally do here is the fact that this TabBarViewController is being added as a subview.. so I am woundering if thats screwing things up.. but if so I have no idea how to fix...
any help would be greatly appreciated.
You can debug the problem by adding:
NSAssert (nil != [self delegate]);
just before the call to loadViewsAction
. That assert will fail because you have not assigned the TabBarController's delegate. After creating the TabVarController, perform:
tbVS.delegate = self;
You'll then have a delegate to use for loadViewsAction.
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