iOS Noob- Declaring Variables

[resetme]

Noob question, what is the difference declaring variables like this (.h file)?

case 1:

@interface my App : UIViewController{
    IBOutlet UIImageView *imageView;
}

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

case 2:

@interface my App : UIViewController{
    IBOutlet UIImageView *imageView;
}

case 3:

@interface my App : UIViewController
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

for me they all do the same.. instance variables.

 

[Ides]

Case 1: You have an instance variable called imageView and also have getter and setter methods for that variable.

Case 2: You have only an instance variable but no getters or setters

Case 3: you have getters and setters but no instance variable. If you do this you will need to create the instance variable when you synthesize the property, e.g @synthesize imageView = _imageView;

Also, IBOutlets should be strong, not weak, if I'm not mistaken

 

[ArtOfWarfare]

Case 3: you have getters and setters but no instance variable. If you do this you will need to create the instance variable when you synthesize the property, e.g @synthesize imageView = _imageView

@synthesize isn't necessary anymore; unless I'm mistaken, an instance variable named _propertyName will be assumed.

 

[waterskier2007]

@synthesize isn't necessary anymore; unless I'm mistaken, an instance variable named _propertyName will be assumed.

I believe that you simply should use @synthesize propertyName; and it will assume _propertyName

 

[resetme]

Ty guys... always helpful!

I think that weak is for default and strong for controller.