UIActivityIndicatorView doesn't work on iPhone 4 with iOS4?

Import ... activityIndicatorInstance.layer. ShadowColor = UIColor grayColor. CGColor; activityIndicatorInstance.layer.

ShadowRadius = 1; activityIndicatorInstance.layer. ShadowOpacity = 0.5; activityIndicatorInstance.layer. ShadowOffset = CGSizeMake(0, 1).

1 This does work pretty well. – Will Harris Oct 13 '10 at 16:08 What class is activityIndicatorInstance? Because the compiler doesn't like that syntax for UIActivityIndicatorView: error: accessing unknown 'shadowColor' component of a property – Oscar Goldman Dec 14 '10 at 9:24 Oscar: Yes, it is UIActivityIndicatorView... Did you add the import statement that is on top of my post?

– joshis Dec 27 '10 at 12:46.

Oddly it uses a transparent alpha channel on the iPhone 4. A solution may be to add a kind of background...

I had the same problem, but found that if I coded it rather than using Interface Builder it worked.

If your design allows, you can also use the UIActivityIndicatorViewStyleGray or attempt to add a dark shadow to the activityView's layer.

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