swift + crc32

 class CRC32 {

    var data = NSData()

    

    private static let crcTableLength = Int(UInt8.max) + 1

    private static var _crcTable = [UInt32](count: crcTableLength, repeatedValue: 0)

    private static var crcTable: [UInt32] {

        get {

            if _crcTable[1] != 0 {

                return _crcTable

            }

            for n in 0..

                var c = UInt32(n)

                for _ in 0..<8 {

                    if ((c & 1) != 0) {

                        c = 0xedb88320 ^ (c >> 1)

                    } else {

                        c = c >> 1

                    }

                }

                _crcTable[n] = c

            }

            

            return _crcTable

        }

    }

    

    func getCRC() -> Byte4 {

        var crc: Byte4 = 0

        crc = ~crc

        

        var buf = UnsafePointer<UInt8>(data.bytes)

        let len = data.length

        

        for _ in 0..

            let toBuf = buf.memory

            buf += 1

            let i = Int((crc ^ UInt32(toBuf)) & 0xFF)

            crc = self.dynamicType.crcTable[i] ^ crc >> 8

        }

        

        return ~crc

    }

}

HTML+UILabel(or TextView)

On swift

var attrStr = try! NSAttributedString(

        data: "text".dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true)!,

        options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],

        documentAttributes: nil)

label.attributedText = attrStr

On java

myTextView.setText(Html.fromHtml("

Title

Description here
"));

swift script

沒想到swift也可以替代shell script

#!/usr/bin/swift -F Carthage/Build/Mac/
#只要開頭像這樣宣告就可以用swift xxx.swift執行
#另外 -F 是第三方framework的路徑

#!/usr/bin/env xcrun --toolchain "com.apple.dt.toolchain.Swift_2_3" --sdk machos swift
#使用特殊版本的swift

#請愛用carthage
#mkdir swift_btc_script
#cd swift_btc_script
#echo 'github "nomothetis/OptionKit" ~> 1.0' > Cartfile
#carthage update

swift強化版的enum

enum 水果 {

    case 櫻桃(價位: Int, 產地: String)

    case 火龍果(價位: Int, 產地: String)

    

    static let 價目表 = [

        櫻桃(價位: 3400, 產地: "華盛頓"),

        火龍果(價位: 1100, 產地: "埔里")

    ]

    

    private func valueAt(pos: Int) -> AnyObject? {

        if let first = Mirror(reflecting: self).children.first {

            let children = Mirror(reflecting: first.value).children

            let index = children.startIndex.advancedBy(IntMax(pos))

            if let value = children[index].value as? AnyObject {

                return value

            }

        }

        return nil

    }

    

    func 價位() -> Int {

        if let value = valueAt(0) as? Int {

            return value

        }

        

        return 0

    }

    

    private func valueAt(pos: Int, with: String) -> AnyObject? {

        if let first = Mirror(reflecting: self).children.first {

            if first.label == with {

                let children = Mirror(reflecting: first.value).children

                

                let index = children.startIndex.advancedBy(IntMax(pos))

                if let value = children[index].value as? AnyObject {

                    return value

                }

            }

        }

        return nil

    }

    

    static func 詢價(水果名: String) -> Int {

        for 價目 in 價目表 {

            if let price = 價目.valueAt(0, with: 水果名) as? Int {

                return price

            }

        }

        

        return 0

    }

}

水果.詢價("火龍果")

got UIBarButtonSystemItem icon on iOS

修正iOS11失敗的問題

use apple script to disable AppleUSBFTDI

tell application "Finder"

display dialog ("Check dongle is plugin.") buttons {"Ok"}

try

do shell script "sudo kextunload -b com.apple.driver.AppleUSBFTDI" with administrator privileges

end try

display dialog ("It work!") buttons {"Ok"}

end tell

Cordova速記

cordova create 資料夾 com.公司名.專案名 程式名

cordova platform add iOS 

cordova platform add android

cordova plugin add cordova-plugin-device