copyWithZone error -[DataObject setECGCount:]: unrecognized selector sent to instance - objective-c

Question

My application crashed with the following error:
-[Data Object set ECGCount:]: unrecognized selector sent to instance 0x281671ad0
I am trying to pass data between my main viewController class into DataObject class which will then finally pass this information into IntervalGraph class.
I am doing this using copyWithZone however am getting stuck.
here is the viewContoller.h Class:
#import <UIKit/UIKit.h>
#import "CorePlot-CocoaTouch.h"
#interface ViewController : UIViewController<CPTPlotDataSource>
#property (nonatomic, assign) int eCGCount;
#property (nonatomic, assign) int eCGheartRate;
#end
and the relevant code in viewController.m
#property (nonatomic) DataObject *maxRecordedHR, *minRecordedHR, *currentData, *continuousData, *seizureData;
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter addObserver:self
selector:#selector(sensorDataUpdated)
name:#"LYRDeviceCommunicatorDataUpdated"
object:nil];
self.rollingAverageHRArray = [[NSMutableArray alloc]initWithCapacity:180];
self.currentData = [[DataObject alloc]init];
self.continuousData = [[DataObject alloc]init];
self.seizureData = [[DataObject alloc]init];
}
//fired by a 1 second timer
-(void)startIntervalGraph {
[self sensorDataUpdated];
if (self.currentData.heartrate == 0 )
{NSLog(#"No data");
} else {
self.rollingAverageLabel.text = [NSString stringWithFormat:#"rolling 3 min average %1.1f", self.currentData.rollingaverageheartrate];
[self.intervalGraph addDataObject:self.currentData]; // something wrong here
[self.intervalGraph updateGraph];
NSLog(#"Updating Interval Graph");
}
}
-(void) sensorDataUpdated {
//Heart Rate
self.currentData.heartrate = self.eCGheartRate;
NSLog(#"Current Data %d", self.currentData.heartrate);
}
-(void)setECGCount:(int)eCGCount
{
self.eCGheartRate = (int) eCGCount;
eCGCount = self.eCGCount;
NSLog(#"eCGCount %d", self.eCGCount);
}
then the DataObject.h class
#import <Foundation/Foundation.h>
#interface DataObject : NSObject <NSCopying>
#property int heartrate;
#property float rollingaverageheartrate;
#property float rrinterval;
#property NSTimeInterval occurrence;
#property NSInteger minHRsetting;
#property NSInteger maxHRsetting;
#property int alarmtripped;
#end
and the DataObject.m
#import "DataObject.h"
#import "CRPC_300SDK.h"
#import "ViewController.h"
#implementation DataObject
- (id)copyWithZone:(NSZone *)zone
{
id copy = class alloc] init];
if (copy) {
// Set primitives
[copy setECGCount:self.heartrate]; //THIS IS WHERE THE CRASH OCCURS.
//[copy setRrinterval:self.rrinterval];
[copy setRollingaverageheartrate:self.rollingaverageheartrate];
[copy setOccurrence:self.occurrence];
[copy setMinHRsetting:self.minHRsetting];
[copy setMaxHRsetting:self.maxHRsetting];
[copy setAlarmtripped:self.alarmtripped];
}
return copy;
}
When i call
[copy setECGCOUNT:self.heartrate];
The app crashes with the following error:
2020-08-20 11:58:57.884543+0100 PulseGuardian[3927:2317144]
-[DataObject setECGCount:]: unrecognized selector sent to instance 0x281671ad0
2020-08-20 11:58:57.885908+0100 PulseGuardian[3927:2317144] *
Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[DataObject setECGCount:]:
unrecognized selector sent to instance 0x281671ad0'
How can i fix this problem?

Answer 1

As #Larme pointed out in the comments, i was referencing the wrong method in the
DataObject.m
The code read:
[copy setECGCount:self.heartrate];
when it should have read:
[copy setHeartrate:self.heartrate];
once code was changed the app worked as it should. Silly error on my behalf but will leave this here in case it helps anybody else in the future.