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Outer glow for UIView

I am wondering how I can create an external glow effect outside of a UIView on an iPhone, sort of like when clicking a regular NSTextField on a Mac.

Thanks for any help!

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You can add a custom subview to your UIView that extends outside of your UIView. For example:

UITextView* mainView = [[UITextView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)];
mainView.clipsToBounds = NO;

// Add 5 px of padding to the mainView bounds
CGRect borderFrame = CGRectInset(mainView.bounds, -5, -5);
MyBorderView* borderView = [[MyBorderView alloc] initWithFrame:borderFrame];
customView.userInteractionEnabled = NO;
[mainView addSubview:customView];


MyBorderView

can draw border in your method -drawRect:

, or you can use UIImageView.

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You can create a background image, place it behind the TextField and enlarge it slightly so that some of the glow appears around the borders of the text field.



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If your view is opaque, just add a drop shadow to its layer:

    view.layer.shadowOpacity = 0.5
    view.layer.shadowOffset = CGSizeZero
    view.layer.shadowRadius = 5.0
    view.layer.shadowColor = self.window!.tintColor.CGColor
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