Passing data from 3 classes to one another in Objective C - ios

Question

I am unable to pass variables between 3 views in Objective C. I can pass data from one class to another as long as there are just 2, but if I add another view that needs to access the same delegate method, I am unable to do so.
Let me try to explain:
View1 accesses the delegate method declared in View2. However if I add another view called View3 and need to access delegate method for in View2, I cannot. I declared everything correctly and I am able to reference the delegate method, but still I cannot enter that reference in View3.

Answer 1

Two objects can not be both the delegate of a third. Is that your issue? If so, consider using NSNotification in order to send messages: several objects can subscribe to notifications.

Answer 2

if you want to passing data from 1 class to 3 classes , you had better use NSNotification.
you can use like this.
in the first receive class:
#implementation TestClass1
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (id) init
{
self = [super init];
if (!self) return nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(receiveNotification1:)
name:#"TestNotification"
object:nil];
return self;
}
- (void) receiveNotification1:(NSNotification *) notification
{
NSLog(#"receive 1");
}
#end
in the 2nd receive class:
#implementation TestClass2
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (id) init
{
self = [super init];
if (!self) return nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(receiveNotification2:)
name:#"TestNotification"
object:nil];
return self;
}
- (void) receiveNotification2:(NSNotification *) notification
{
NSLog(#"receive 2");
}
#end
in the 3rd receive class:
#implementation TestClass3
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (id) init
{
self = [super init];
if (!self) return nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(receiveNotification3:)
name:#"TestNotification"
object:nil];
return self;
}
- (void) receiveNotification3:(NSNotification *) notification
{
NSLog(#"receive 3");
}
#end
in the post class:
- (void) yourMethod
{
[[NSNotificationCenter defaultCenter]
postNotificationName:#"TestNotification"
object:self];
}