19 lines
654 B
Swift
19 lines
654 B
Swift
// Source: http://stackoverflow.com/a/3732812/1123156
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extension UIView {
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func firstAvailableUIViewController() -> UIViewController? {
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// convenience function for casting and to "mask" the recursive function
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return traverseResponderChainForUIViewController()
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}
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func traverseResponderChainForUIViewController() -> UIViewController? {
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if let nextUIViewController = next as? UIViewController {
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return nextUIViewController
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} else if let nextUIView = next as? UIView {
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return nextUIView.traverseResponderChainForUIViewController()
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} else {
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return nil
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}
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}
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}
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