Question

I am having some trouble getting my head around how I can init a class and pass identical init params to multiple instances. I can get it to work with 1 outlet (instance1). But how can I also get it to work with instance 2 without re-writing the variables for each instance?

ViewController.h:

#import "CustomClass.h"

@interface MYViewController : UIViewController

@property (unsafe_unretained, nonatomic) IBOutlet CustomClass *instance1;
@property (unsafe_unretained, nonatomic) IBOutlet CustomClass *instance2;

@end

ViewController.m:

#import "CustomClass.h"

@implementation MYViewController;

@synthesize instance1, instance2;

- (void)viewDidLoad
{
    [super viewDidLoad];
    instance1.variable1 = option1;
    instance1.variable2 = 4.5;
    instance1.variable3 = instance1.value;
    [instance1 addTarget:self action:@selector(instance1DidChange) forControlEvents:UIControlEventValueChanged];

Answer 1

A loop with some KVC should do it for you…

@implementation MYViewController;

@synthesize instance1, instance2;

- (void)viewDidLoad
{
    [super viewDidLoad];

    for (int i = 0; i =< 1; i++) {
        MyClass *newInstanceVariable = [[MyClass alloc] init];
        newInstanceVariable.variable1 = option1;
        newInstanceVariable.variable2 = 4.5;
        newInstanceVariable.variable3 = instance1.value;
        [newInstanceVariable addTarget:self action:@selector(instance1DidChange) forControlEvents:UIControlEventValueChanged];
        instanceVariableName = [NSString stringWithFormat:@"instance%i",i];
        [self valueForKey:instanceVariableName] = newInstanceVariable;
    }
}

Should be pretty close to what you’re looking for.