monsoir

// use in a custom view

override func layoutSubviews() {
    super.layoutSubviews()
    setupShadow()
}

private var shadowLayer: CAShapeLayer! // layer for shadow back
private func setupShadow() {
    guard columnStackView.bounds.size != .zero else { return }

monsoir

precedencegroup ForwardPipe {
    associativity: left
    higherThan: LogicalConjunctionPrecedence
}

infix operator |> : ForwardPipe

///Swift implementation of the forward pipe operator from F#

/// Used for better readibility when piping results of one function to the next ones.

monsoir

// https://stackoverflow.com/a/24035942

func foo(args:AnyObject...) {
    for arg: AnyObject in args {
        println(arg)
    }
}

foo(5, "bar", NSView())

monsoir

extension Array where Element: Comparable {
    func binarySearch(_ target: Element) -> Int? {
        var lower = 0
        var upper = count
        while lower < upper {
            let mid = lower + (upper - lower) / 2
            if self[mid] == target {
                return mid
            } else if self[mid] < target {
                lower = mid + 1

monsoir

extension App {
    static var infoDictionary: [String: Any]? {
        return Bundle.main.infoDictionary
    }

    static var appVersion: String {
        return infoDictionary?["CFBundleShortVersionString"] as? String ?? ""
    }

    static var appBuildVersion: String {

monsoir

extension UIViewController {

    /// 获取最顶层的视图控制器
    func topMostViewController() -> UIViewController? {
        if self.presentedViewController == nil {
            return self
        }
        if let navigation = self.presentedViewController as? UINavigationController {
            return navigation.visibleViewController?.topMostViewController()
        }

monsoir

extension CNContactStore {

    /// 是否可以访问通讯录
    /// - true 表示可访问，false 表示未知或不可访问
    class var canAssessContact: Bool {
        return CNContactStore.authorizationStatus(for: .contacts) != .denied
    }

    class var maybeCanAccessContact: Bool {
        return CNContactStore.authorizationStatus(for: .contacts) == .notDetermined

monsoir

extension Data {
    /// 将二进制数据转换为 Int8 类型数值
    var uint8: UInt8 {
        var result: UInt8 = 0
        self.copyBytes(to: &result, count: MemoryLayout<UInt8>.size)
        return result
    }
  
    /// 将二进制数据转换为 Bool 类型数值
    var bool: Bool {

monsoir

extension Bool {
    /// 转换为 16 进制数据
    var bytes: [UInt8] {
        return self ? [UInt8(1)] : [UInt8(0)]
    }

    var binaryData: Data {
        return Data(bytes)
    }
}

monsoir

extension String {
    /// 是否为合法邮箱地址
    var isValidEmail: Bool {
        // https://stackoverflow.com/a/41782027/5211544
        let firstPart = "[A-Z0-9a-z]([A-Z0-9a-z._%+-]{0,30}[A-Z0-9a-z])?"
        let serverPart = "([A-Z0-9a-z]([A-Z0-9a-z-]{0,30}[A-Z0-9a-z])?\\.){1,5}"
        let regex = "\(firstPart)@\(serverPart)[A-Za-z]{2,8}"

        let predicate = NSPredicate(format: "SELF MATCHES %@", regex)
        return predicate.evaluate(with: self)