App Store

• 进入 App Store 评分页面

let appid = "xxxxxx"
let url = URL(string: "itms-apps://itunes.apple.com/app/id\(appid)?action=write-review")!
UIApplication.shared.open(url)

颜色扩展

• swift

extension UIColor {
    convenience init(hex: String) {
        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        
        var int: UInt64 = 0
        Scanner(string: hex).scanHexInt64(&int)
        let a, r, g, b: UInt64
        switch hex.count {
        case 3: // RGB (12-bit)
            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
        case 6: // RGB (24-bit)
            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
        case 8: // ARGB (32-bit)
            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
        default:
            (a, r, g, b) = (0, 0, 0, 0)
        }
        self.init(red: Double(r) / 255, green: Double(g) / 255, blue:  Double(b) / 255, alpha: Double(a) / 255)
    }
}

• swiftUI

extension Color {
    init(hex: String) {
        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        
        var int: UInt64 = 0
        Scanner(string: hex).scanHexInt64(&int)
        let a, r, g, b: UInt64
        switch hex.count {
        case 3: // RGB (12-bit)
            (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
        case 6: // RGB (24-bit)
            (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
        case 8: // ARGB (32-bit)
            (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
        default:
            (a, r, g, b) = (0, 0, 0, 0)
        }
        self.init(red: Double(r) / 255, green: Double(g) / 255, blue:  Double(b) / 255, opacity: Double(a) / 255)
    }
}

获取公网IP

/// 获取公网IP
func getPublicIP() async -> String {
    let url = URL(string: "https://www.taobao.com/help/getip.php")!
    
    var ipAddress = ""
    do {
        let (data, _) = try await URLSession.shared.data(from: url)
        if let str = String(data: data, encoding: .utf8) {
            let pattern = #"(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})"#
            let regex = try! NSRegularExpression(pattern: pattern)

            if let range = regex.firstMatch(in: str, range: NSMakeRange(0, str.count))?.range {
                let startIndex = str.index(str.startIndex, offsetBy: range.location)
                let endIndex = str.index(startIndex, offsetBy: range.length)
                
                ipAddress = String(str[(startIndex..<endIndex)])
            }
        }
    } catch {
        print(error)
    }
    return ipAddress
}