ios - How can I use IBOutletCollection to connect multiple UIImageViews to the same outlet?

Question

I have 10 UIImageViews which do the same thing (they have some void methods that change their image with a timer). My UIImageView is an outlet and I want to connect all the 10 imageViews to the same outlet, but interface builder doesn't allow me.

I found that there is a solution, IBOutletCollection. Can anyone explain to me how to use this to connect multiple imageViews to the same outlet?

Answer 1

Declare a property to hold your imageView's and then hook them up in interface builder like normal

@property (nonatomic, strong) IBOutletCollection(UIImageView) NSArray *imageViews;

it's just a normal NSArray but when the nib is loaded it will be populated with your imageView's

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Update

In the header file for you view controller which has the multiple imageView's on you need to add the property above - it may look something like this:

@interface MyViewController : UIViewController

@property (nonatomic, strong) IBOutletCollection(UIImageView) NSArray *imageViews;
// other properties

@end

Now in the interface builder you connect all the imageView's to this one property.

Now I just work with the imageViews collection

for (UIImageView *imageView in self.imageViews) {
  imageView.image = someImage;
}