Apple Watch - Watch Kit - Delegate method not being called - ios

Question

Ok so I am attempting to pass an int to another interface, edit the int and give it back to the original interface. I am trying to use a delegate to achieve this and I believe I have it setup correctly and it appears the method is not being called when its supposed to.
//
// InterfaceController.h
// DelegateTest WatchKit Extension
//
// Created by Rohan Hodge on 20/10/2015.
// Copyright © 2015 Hodge Development. All rights reserved.
//
#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>
#import "SecondController.h"
#interface InterfaceController : WKInterfaceController <DelegateTest>
{
NSTimer *Update;
}
#property (strong, nonatomic) IBOutlet WKInterfaceLabel *FirstControllerLabel;
#property (nonatomic,assign) int FirstInteger;
#property (nonatomic,assign) int RecievedInteger;
#property (nonatomic,assign) NSString *PassString;
#end
// InterfaceController.m
// DelegateTest WatchKit Extension
//
// Created by Rohan Hodge on 20/10/2015.
// Copyright © 2015 Hodge Development. All rights reserved.
//
#import "InterfaceController.h"
#interface InterfaceController()
#end
#implementation InterfaceController
#synthesize FirstInteger;
#synthesize RecievedInteger;
#synthesize PassString;
- (void)awakeWithContext:(id)context {
[super awakeWithContext:context];
// Configure interface objects here.
}
-(void)UpdateVoid
{
self.FirstControllerLabel.text = [NSString stringWithFormat:#"%i", FirstInteger];
}
- (void)willActivate {
SecondController *interfaceController;
interfaceController.delegate = self;
Update = [NSTimer timerWithTimeInterval:1.0 target:self selector:#selector(UpdateVoid) userInfo:nil repeats:YES];
// This method is called when watch view controller is about to be visible to user
[super willActivate];
}
- (void)didDeactivate {
// This method is called when watch view controller is no longer visible
[super didDeactivate];
}
-(void)DelegateMethod:(int)ReturningInt
{
[self popController];
FirstInteger = ReturningInt;
self.FirstControllerLabel.text = [NSString stringWithFormat:#"%i", FirstInteger];
}
- (IBAction)UpButton {
FirstInteger++;
self.FirstControllerLabel.text = [NSString stringWithFormat:#"%i", FirstInteger];
}
- (IBAction)DownButton {
FirstInteger--;
self.FirstControllerLabel.text = [NSString stringWithFormat:#"%i", FirstInteger];
}
- (IBAction)PassDataButton {
PassString = [NSString stringWithFormat:#"%i", FirstInteger];
[self pushControllerWithName:#"SecondController" context:PassString];
}
#end
//
// SecondController.h
// DelegateTest
//
// Created by Rohan Hodge on 20/10/2015.
// Copyright © 2015 Hodge Development. All rights reserved.
//
#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>
//This declaration of delegate.
#protocol DelegateTest <NSObject>
-(void) DelegateMethod:(int)ReturningInt;
#end
#interface SecondController : WKInterfaceController
{
id delegate;
}
#property (nonatomic, assign) id <DelegateTest> delegate;
#property (strong, nonatomic) IBOutlet WKInterfaceLabel *SecondLabel;
#property (nonatomic,assign) NSString *RecievedString;
#property (nonatomic, assign) int FirstReceivedInteger;
#end
//
// SecondController.m
// DelegateTest
//
// Created by Rohan Hodge on 20/10/2015.
// Copyright © 2015 Hodge Development. All rights reserved.
//
#import "SecondController.h"
#import "InterfaceController.h"
#interface SecondController ()
#end
#implementation SecondController
#synthesize SecondLabel;
#synthesize FirstReceivedInteger;
#synthesize RecievedString;
#synthesize delegate = _delegate;
- (void)awakeWithContext:(id)context {
[super awakeWithContext:context];
//This is where I receive the int inside of a string and split it from the string so I can change it
RecievedString = context;
FirstReceivedInteger = [RecievedString intValue];
// Configure interface objects here.
}
- (void)willActivate {
self.SecondLabel.text = [NSString stringWithFormat:#"%i",FirstReceivedInteger];
// This method is called when watch view controller is about to be visible to user
[super willActivate];
}
- (IBAction)UpButton {
FirstReceivedInteger++;
self.SecondLabel.text = [NSString stringWithFormat:#"%i",FirstReceivedInteger];
}
- (IBAction)DownButton {
FirstReceivedInteger--;
self.SecondLabel.text = [NSString stringWithFormat:#"%i",FirstReceivedInteger];
}
//This is a button that is ment to pass back the int.
- (IBAction)ReturnToOriginalInterface:(id)sender{
[self.delegate DelegateMethod:FirstReceivedInteger];
}
- (void)didDeactivate {
// This method is called when watch view controller is no longer visible
[super didDeactivate];
}
#end
I'm new to Stack Overflow, Sorry about the messy code formatting.
P.S I use the Arrow in the top left of the interface to return to the original Interface. Also am using Objective-C
Thanks in advance.

Answer 1

You need to set a property or method to change in your controller (that your first controller will change) and you get back the result with a delegate pattern.

Answer 2

You're attempting to do this in a Watch app, yes? I don't know that delegates don't work, but when I did this for my Watch app, I used the context parameter of WKInterfaceController::presentControllerWithName:context:.
context is a NSDictionary of the values you want to pass around. One of those values could be a pointer to the presenting controller.
So, trying to decipher what you're attempting in your app, I believe the proper thing to do is:
In the ORIGINAL WKInterfaceController:
- (IBAction)buttonThatOpensOtherIC
{
NSDictionary *context = #{
#"firstController" : self,
};
[self pushControllerWithName:#"Other IC"
context:context];
}
}
In the OTHER WKInterfaceController:
- (void)awakeWithContext:(id)context {
[super awakeWithContext:context];
if (context)
{
self.originalInterfaceController = context[#"firstController"];
}
}
//This is the button that calls the delegate method.
- (IBAction)ReturnToOriginalInterface:(id)sender
{
// [self.delegate DelegateMethod:FirstReceivedInteger];
if (self.originalInterfaceController) {
self.originalInterfaceController.firstInteger = self.returningInt;
}
[self popController];
}
*Note the use of awakeWithContext: in the OTHER interface controller.
DISCLAIMER #1: I haven't executed this code, so there may be a typo in it. It is an adaptation for you of working code I do use.
DISCLAIMER #2: I haven't updated my app for WatchOS 2. I doubt this part of things changed, but it is possible.