Object being populated shows null fields in log (IOS, OBJ-C) - ios

Question

I'm populating an object's fields from Labels, when displaying in Log the label is the correct value, but the object's field is null. I'm coming over from an Android/ Java background and this is just awkward.
Any help would be great.
To be clear, the "soil type field" log shows "example"while the "soil type" log shows (null)
- (IBAction)saveButton:(id)sender {
Soil *thisSoil = self.thisSoil;
thisSoil.soilType = self.soilNameField.text;
NSLog(#"soil type field %#", self.soilNameField.text);
NSLog(#"soil type: %#", thisSoil.soilType);
thisSoil.frictionAngle = [self.frictionAngleValue.text integerValue];
if ([self.soilUnitsSwitch isOn] ) {
thisSoil.cohesion = [self.cohesionValue.text doubleValue];
thisSoil.unitWeight = [self.unitWeightValue.text doubleValue];
}else{
thisSoil.cohesion = [self.cohesionValue.text doubleValue];
thisSoil.unitWeight = [self.unitWeightValue.text doubleValue];
}
[self.delegate SoilCreatorViewController:self didFinishItem:thisSoil];
[self.navigationController popViewControllerAnimated:YES];
}
The entire controller .m file
#import "SoilCreatorViewController.h"
#define IMPERIAL_TO_METRIC 0.3048
#define KG_TO_LBS 2.2
#interface SoilCreatorViewController ()
#end
#implementation SoilCreatorViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)soilQuestions:(id)sender {
[self popupmaker :#"Friction Angle" : #"Phi is the angle of internal friction for soil, which governs soil strength and resistance. This value should be attained from competent field testing and the judgment of a licensed engineer."];
[self popupmaker :#"Soil Cohesion": #"Cohesion defines the non-stress dependent shear strength of soil and should be used with caution. Typically,cohesion occurs in stiff, over-consolidated clays or cemented native soils. Cohesion should be neglected if the designer is unsure of its presence."];
}
- (IBAction)SwitchDidChange:(id)sender {
if ([sender isOn]) {
self.cohesionUnits.text = #"Ft";
self.unitWeightUnits.text= #"M";
}else{
self.cohesionUnits.text = #"M";
self.unitWeightUnits.text = #"M";
}
}
- (IBAction)unitWtDidChange:(id)sender {
self.unitWeightValue.text = [NSString stringWithFormat:#"%.1f", (double)self.unitWeightStepper.value];
}
- (IBAction)frictionAngleDidChange:(id)sender {
self.frictionAngleValue.text = [NSString stringWithFormat:#"%d", (int)self.frictionAngleStepper.value];
}
- (IBAction)cohesionDidChange:(id)sender {
self.cohesionValue.text = [NSString stringWithFormat:#"%.1f", (double)self.cohesionStepper.value];
}
- (IBAction)textFieldDismiss:(id)sender {
[[self view] endEditing:YES];
}
- (IBAction)UnitSwitch:(id)sender {
if ([sender isOn]) {
self.unitWeightUnits.text = #"LBS/cubic Ft.";
self.cohesionUnits.text = #"imp";
}else{
self.unitWeightUnits.text = #"KG/m3";
self.cohesionUnits.text = #"met";
}
}
- (IBAction)cancelButton:(id)sender {
[self.navigationController popViewControllerAnimated:YES];
}
- (IBAction)saveButton:(id)sender {
Soil *thisSoil = self.thisSoil;
thisSoil.soilType = self.soilNameField.text;
NSLog(#"soil type field %#", self.soilNameField.text);
NSLog(#"soil type: %#", thisSoil.soilType);
thisSoil.frictionAngle = [self.frictionAngleValue.text integerValue];
if ([self.soilUnitsSwitch isOn] ) {
thisSoil.cohesion = [self.cohesionValue.text doubleValue];
thisSoil.unitWeight = [self.unitWeightValue.text doubleValue];
}else{
thisSoil.cohesion = [self.cohesionValue.text doubleValue];
thisSoil.unitWeight = [self.unitWeightValue.text doubleValue];
}
[self.delegate SoilCreatorViewController:self didFinishItem:thisSoil];
[self.navigationController popViewControllerAnimated:YES];
}
-(void)popupmaker:(NSString *)title :(NSString *)message{
UIAlertView * alert =[[UIAlertView alloc ] initWithTitle:title
message:message
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil
];
[alert show];
}
#end
The .h file
#import "Soil.h"
#class SoilCreatorViewController;
#protocol SoilCreatorViewDelegate <NSObject>
-(void)SoilCreatorViewController:(SoilCreatorViewController *)controller didFinishItem:(Soil *)item;
#property (nonatomic, weak) id <SoilCreatorViewDelegate> delegate;
#end
#import <UIKit/UIKit.h>
#import "CalculationDetailViewController.h"
#interface SoilCreatorViewController : UIViewController
#property (nonatomic,weak) id<SoilCreatorViewDelegate> delegate;
#property (weak, nonatomic) IBOutlet UITextField *soilNameField;
#property (weak, nonatomic) IBOutlet UISwitch *soilUnitsSwitch;
#property (nonatomic,strong) Soil *thisSoil;
#property (weak, nonatomic) IBOutlet UIStepper *frictionAngleStepper;
#property (weak, nonatomic) IBOutlet UIStepper *unitWeightStepper;
#property (weak, nonatomic) IBOutlet UIStepper *cohesionStepper;
#property (weak, nonatomic) IBOutlet UILabel *unitWeightValue;
#property (weak, nonatomic) IBOutlet UILabel *frictionAngleValue;
#property (weak, nonatomic) IBOutlet UILabel *cohesionValue;
#property (weak, nonatomic) IBOutlet UILabel *unitWeightUnits;
#property (weak, nonatomic) IBOutlet UILabel *cohesionUnits;
- (IBAction)soilQuestions:(id)sender;
- (IBAction)SwitchDidChange:(id)sender;
- (IBAction)unitWtDidChange:(id)sender;
- (IBAction)frictionAngleDidChange:(id)sender;
- (IBAction)cohesionDidChange:(id)sender;
- (IBAction)textFieldDismiss:(id)sender;
- (IBAction)cancelButton:(id)sender;
- (IBAction)saveButton:(id)sender;
-(void)popupmaker:(NSString *)title :(NSString *)message;
#end

Answer 1

I don't see any code that sets up thisSoil. At some point in your code, you need to write something like
self.thisSoil = [[Soil alloc] init];
or self.thisSoil will stay nil forever.