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[UIEdgeInsets+DictionaryLiteral] Use a dictionary literal for UIEdgeInsets #swift #uikit
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| extension UIEdgeInsets: ExpressibleByDictionaryLiteral { | |
| public typealias Key = EdgeKey | |
| public typealias Value = CGFloat | |
| public enum EdgeKey { | |
| case top | |
| case left | |
| case bottom | |
| case right | |
| } | |
| func keyPath(forEdge edgeKey: EdgeKey) -> WritableKeyPath<UIEdgeInsets, CGFloat> { | |
| switch edgeKey { | |
| case .top: return \UIEdgeInsets.top | |
| case .left: return \UIEdgeInsets.left | |
| case .bottom: return \UIEdgeInsets.bottom | |
| case .right: return \UIEdgeInsets.right | |
| } | |
| } | |
| public init(dictionaryLiteral elements: (EdgeKey, CGFloat)...) { | |
| self = UIEdgeInsets() | |
| for (edge, value) in elements { | |
| let keyPath = self.keyPath(forEdge: edge) | |
| self[keyPath: keyPath] = value | |
| } | |
| } | |
| } |
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