//  字符串 stringfunc stringTest() -> Void {// 字符串let str1 = "yiyi"let str2 = "2222"var str3 = String()//空stringvar str4 = ""// 空string// 字符（字符为 一 个）let char1:Character = "d"// 字符串长度var strCount = str1.characters.countstrCount = str1.lengthOfBytes(using: String.Encoding.utf8)print(String(format:"strCount == "),strCount)// 字符串转换integerprint((str2 as NSString).integerValue)// 字符串拼接str3 = str1 + str2
//        str3 = "\(str1)\(str2)"
//        str3 = globalStr + String(str1)print(String(format:"str3 == "),str3)// 字符串与字符拼接
//        str4 = str1+String(char1)str4 = "\(str1)\(char1)"str4 = str1.appending(String(char1))// 其他类型转换string  String() exp:String(strCount)print(String(format:""),str4)//字符串与其他类型值的拼接let int1 = 10let int2 = 11.1let str5 = String(format:"%i%.1f",int1,int2)print(String(format:"str5 == "),str5)// 字符串枚举 遍历每个字符let s1 = "hello world!"if strCount != 0 {print("判断string长度不为0，不是空")}for c in s1.characters {print(c)}// 字符串比较let ss1 = "hello"let ss2 = ",banana"var ss3 = ss1+ss2if ss1 == ss2 {print("ss1=ss2")}if ss1+ss2 == ss3 {print("ss1+ss2=ss3")}if ss1 > ss2 {// h大于bprint("ss1>ss2")}// 判断字符串是否包含字符串if (ss3 .range(of: ss1) != nil) {print("字符串包含子串")}　　　　　if ss3.hasPrefix("he") {}　　　　　if ss3.hasSuffix("a") {}

// 字符串 大小写print(ss3.uppercased())// HELLO,BANANAprint(ss3.capitalized)// Hello,Bananaprint(ss3.lowercased())// hello,banana/*// 这两个用法没 明白 print(ss3.uppercased(with: Locale(identifier: "l")))// HELLO,BANANAprint(ss3.lowercased(with: Locale(identifier: "o")))// hello,banana*/// 截取 修剪 字符串print(ss3.substring(from: ss3.characters.index(of: ",")!))//,banana 截取字符串从“,”开始print(ss3.substring(to: ss3.characters.index(of: ",")!))//hello 截取字符串到“,”结束print(ss3.unicodeScalars[ss3.unicodeScalars.startIndex ..< ss3.unicodeScalars.index(of: ",")!]);// helloprint(ss3[ss3.index(ss3.startIndex, offsetBy: 4)])// o  取字符串的某个字符ss3.remove(at: ss3.characters.index(of: ",")!)// 去除字符串中特殊字符print(ss3)// hellobanana
        }

// 数组 arrayfunc arrayTest() -> Void {// 初始化
//        var array1:[Any] = []// 空 任意类型
//        var array2 = Array<Any>()
//        var array3:[String] = []// 空 string 类型
//        var array4 = Array<String>()
//        let array5 = Array<Any>(repeatElement("", count: 3))var arr0 = ["what","test","swift","array"]let arr1 = ["hyArr",1,"hySwift",3] as [Any]var arr2 = [1,"2","swiftArr2",3,9,5] as [Any]print(arr2[0], arr2[3], separator: "* ")// arr0.count  数组countprint(String(format:"arr0 长度 == "),arr0.count)// 判断数组是否为空if arr1.isEmpty {print("arr1数组是空")}else {print("arr1数组不空")}// arr1[arr1.count-2] 取数组的某个元素print(arr1[arr1.count-2])// hySwift
//        print(arr1[0])// hyArr//  public var first: Self.Iterator.Element? { get }print(arr1.first!)// hyArr// 遍历数组for i in 0..<arr1.count {print(arr1[i])}// 包含if arr0 .contains("test") {print("数组包含 test")}else {print("数组不包含 test")}// 删除元素
//        arr2 .remove(at: 4)
//        arr2 .removeSubrange(1..<3)// 删除 1、2 两个元素
//        arr2 .removeLast()
//        arr2 .removeFirst()
        arr2 .removeAll()print(arr2)// 添加元素arr2 .append("new1")// ["new1"]arr2.append(contentsOf: ["Shakia", "William"])print(arr2)arr2 = arr1 + arr2// ["hyArr", 1, "hySwift", 3, "new1"]arr2 = arr1arr2 .insert("insertElement", at: 3)//["hyArr", 1, "hySwift", "insertElement", 3, "new1"]// 更换if let i = arr0.index(of: "test") {arr0[i] = "测试"}arr2[0] = "domy"print(arr2)// 数组排序var sortArr = [3,5,1,0,8,0]sortArr.sort(by: >)print(String(format:"排序后："),sortArr)// 排序后： [8, 5, 3, 1, 0, 0]// 二维数组let tArr1 = [["tSwift","haha"],1,[3,2]] as [Any]let subArr1 = tArr1[0]print(subArr1)///  Array => NSArray///  苹果的例子/// Description:/// The following example shows how you can bridge an `Array` instance to/// `NSArray` to use the `write(to:atomically:)` method. In this example, the/// `colors` array can be bridged to `NSArray` because its `String` elements/// bridge to `NSString`. The compiler prevents bridging the `moreColors`/// array, on the other hand, because its `Element` type is/// `Optional<String>`, which does *not* bridge to a Foundation type.let colors = ["periwinkle", "rose", "moss"]let moreColors: [String?] = ["ochre", "pine"]let url = NSURL(fileURLWithPath: "names.plist")(colors as NSArray).write(to: url as URL, atomically: true)// true
        (moreColors as NSArray).write(to: url as URL, atomically: true)// error: cannot convert value of type '[String?]' to type 'NSArray'/// Array 的更多其他用法点进去查看方法文档}

    // 字典 dictionaryfunc dictionaryTest() -> Void {        // 创建字典var dict = [200:"ok",400:"error"]// [key:value]var emptyDict: [String: Any] = [:]// 空字典 var emptyDict: [Int: String] = [:]emptyDict = ["key1":"value1","key2":2]// Getting and Setting Dictionary Valuesprint(dict[200]!)// okprint(emptyDict["key1"]!)// value1// 添加键值对emptyDict["key3"] = "value3"print(emptyDict)// ["key2": 2, "key3": "value3", "key1": "value1"]// 更新键值对的valueemptyDict["key2"] = "updateValue2"print(String(format:("更换value后：")),emptyDict)var interestingNumbers = ["primes": [2, 3, 5, 7, 11, 13, 15],"triangular": [1, 3, 6, 10, 15, 21, 28],"hexagonal": [1, 6, 15, 28, 45, 66, 91]]//  排序for key in interestingNumbers.keys {interestingNumbers[key]?.sort(by: >)}print(interestingNumbers["primes"]!)/// print(interestingNumbers)/// ["hexagonal": [91, 66, 45, 28, 15, 6, 1],/// "primes": [15, 13, 11, 7, 5, 3, 2],/// "triangular": [28, 21, 15, 10, 6, 3, 1]]// 遍历字典let imagePaths = ["star": "/glyphs/star.png","portrait": "/images/content/portrait.jpg","spacer": "/images/shared/spacer.gif"]for (key, value) in imagePaths {print("The path to '\(key)' is '\(value)'.")}/// search a dictionary's contents for a particular value
//        let glyphIndex = imagePaths.index {
//            $0.value.hasPrefix("/glyphs")
//        }
//        print(imagePaths[glyphIndex!].value)// /glyphs/star.png
//        print(imagePaths[glyphIndex!].key)// starlet glyphIndex = imagePaths.contains {$0.value.hasPrefix("/glyphx")}print(glyphIndex)// ture/// Bridging Between Dictionary and NSDictionary// imagePaths as NSDictionaryprint("keys:\((imagePaths as NSDictionary).allKeys) ,values:\((imagePaths as NSDictionary).allValues)")}