求字符串大小
extension String {
func getSize(_ font: UIFont) -> CGSize {
let rect = NSString(string: self).boundingRect(with: CGSize(width: CGFloat(MAXFLOAT), height: CGFloat(MAXFLOAT)), options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return rect.size
}
func getHeight(_ font: UIFont, _ width: CGFloat) -> CGFloat {
let rect = NSString(string: self).boundingRect(with: CGSize(width: width, height: CGFloat(MAXFLOAT)), options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return ceil(rect.height)
}
func getHeight(_ font: UIFont, _ width: CGFloat, _ maxHeight: CGFloat) -> CGFloat {
let rect = NSString(string: self).boundingRect(with: CGSize(width: width, height: CGFloat(MAXFLOAT)), options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return ceil(rect.height) > maxHeight ? maxHeight : ceil(rect.height)
}
func getWidth(_ font: UIFont, _ height: CGFloat) -> CGFloat {
let rect = NSString(string: self).boundingRect(with: CGSize(width: CGFloat(MAXFLOAT), height: height), options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return ceil(rect.width)
}
func getWidth(_ font: UIFont, _ height: CGFloat, _ maxWidth: CGFloat) -> CGFloat {
let rect = NSString(string: self).boundingRect(with: CGSize(width: CGFloat(MAXFLOAT), height: height), options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return ceil(rect.width) > maxWidth ? maxWidth : ceil(rect.width)
}
}
字符串解码、转换
extension String {
var unicodeStr: String {
let tempStr1 = self.replacingOccurrences(of: "\\u", with: "\\U")
let tempStr2 = tempStr1.replacingOccurrences(of: "\"", with: "\\\"")
let tempStr3 = "\"".appending(tempStr2).appending("\"")
let tempData = tempStr3.data(using: String.Encoding.utf8)
var returnStr:String = ""
do {
returnStr = try PropertyListSerialization.propertyList(from: tempData!, options: [.mutableContainers], format: nil) as! String
} catch {
deprint(error)
}
return returnStr.replacingOccurrences(of: "\\r\\n", with: "\n")
}
func utf8Str() -> String {
guard includeChinese() else {return self}
return self.utf8HTMLStr()
}
func unicode() -> String {
guard includeChinese() else {return self}
return ""
}
func includeChinese() -> Bool {
for (_, value) in self.enumerated() {
if ("\u{4E00}" <= value && value <= "\u{9FA5}") {
return true
}
}
return false
}
func toUTF8() -> String {
var arr = [UInt8]()
arr += self.utf8
return String(bytes: arr, encoding: .utf8) ?? self
}
func GBK() -> String {
let enc = CFStringConvertEncodingToNSStringEncoding(UInt32(CFStringEncodings.GB_18030_2000.rawValue))
let str = String(data: data(using: .utf8)!, encoding: String.Encoding(rawValue: enc))
return str ?? self
}
func utf8UrlStr() -> String {
var set = CharacterSet()
set.formUnion(CharacterSet.urlQueryAllowed)
set.remove(charactersIn: "[].:/?&=;+!@#$()',*\"")
return self.addingPercentEncoding(withAllowedCharacters: set) ?? self
}
func utf8HTMLStr() -> String {
var result = ""
for item in self.utf16 {
let str = String(format: "%04x", item)
result.append("&#x" + str + ";")
}
return result
}
}
字符串截取
extension String {
/// 替换字符串最后一部分（例：AA>BB>CC，s 为：>，取：CC）
mutating func replaceLast(with str: String, s: String) {
var arr = self.components(separatedBy: s)
arr[arr.count - 1] = str
self = arr.joined(separator: s)
}
/// 替换
mutating func replace(_ str: String, _ toStr: String) {
var string = self
if let range = string.range(of: str) {
string.replaceSubrange(range, with: toStr)
}
self = string
}
mutating func removeLastSpace() {
let str = self
if str.last == " " {
self = String(str.prefix(upTo: str.index(str.endIndex, offsetBy: -1)))
self.removeLastSpace()
}
}
static func isEmpty(_ string: String?) -> Bool {
return string == nil || string == ""
}
func sub(_ start: Int, _ count: Int) -> String {
let startIndex = self.index(self.startIndex, offsetBy: start)
let endIndex = self.index(self.startIndex, offsetBy: start + count)
return String(self[startIndex..
字符串汉字处理
extension String { /// 列表排序
/// 判断字符串中是否有中文
func isIncludeChinese() -> Bool {
for ch in self.unicodeScalars {
if (0x4e00 < ch.value && ch.value < 0x9fff) { return true } // 中文字符范围：0x4e00 ~ 0x9fff
}
return false
}
/// 获取大写首字母
func firstChar() -> String {
guard self.count > 0 else {return ""}
var firstString: String = ""
//判断首字母是否为大写
let regexA = "^[A-Z]$"
let predA = NSPredicate(format: "SELF MATCHES %@", regexA)
if isIncludeChinese() {
let strPinYin = pinyinString()
//截取大写首字母
firstString = String(strPinYin.first!).uppercased()
}else {
firstString = String(self.first!).uppercased()
}
return predA.evaluate(with: firstString) ? firstString : "#"
}
func pinyinString() -> String {
//转变成可变字符串
let mutableString = NSMutableString(string: self)
//将中文转换成带声调的拼音
CFStringTransform(mutableString as CFMutableString, nil, kCFStringTransformToLatin, false)
//去掉声调
let pinyinString = mutableString.folding(options: String.CompareOptions.diacriticInsensitive, locale: .current)
//多音字
let strPinYin = polyphoneStringHandle(nameString: self, pinyinString: pinyinString)
return strPinYin
}
//多音字处理，根据需要添自行加
func polyphoneStringHandle(nameString: String, pinyinString: String) -> String {
if nameString.hasPrefix("沈") {return "shen"}
return pinyinString
}
}
字符串 Mac地址
extension String { // mac地址转换
func macType() -> String { /// 带 ：的大写 Mac 地址
if !self.contains(":") {
var arr: [String] = []
let j = 2
let count = self.count / 2 + (self.count % 2 == 0 ? 0 : 1)
for i in 0.. String { /// 不带 ：的十六进制地址
return removeText(":").lowercased()
}
func removeText(_ text: String) -> String {
if self.contains(text) {
return self.replacingOccurrences(of: text, with: "")
}
return self
}
}
字符串进制转换
enum NumberType: Int {
case Octal = 8
case Hex = 16
case Decimal = 10
}
extension String {
// 整形的 utf8 编码范围
static let intRange = 48...57
// 小写 a~f 的 utf8 的编码范围
static let lowercaseRange = 97...102
// 大写 A~F 的 utf8 的编码范围
static let uppercasedRange = 65...70
// byte数组转字符串（Mac）
// bytes: byte数组
// capChar: 插入的字符
// range: 截取范围（元组）
// type: 进制
static func bytesToString(_ bytes: [UInt8],
_ capChar: String,
_ range: (Int, Int),
_ type: NumberType) -> String
{
var result = ""
let count = range.0 + range.1
if bytes.count > count {
for i in range.0.. String {
var result = ""
let count = range.0 + range.1
if bytes.count > count {
for i in range.0.. Data {
var bytes: [UInt8] = []
switch type {
case .Decimal:
bytes = self.decStringToBytes()
case .Hex:
bytes = self.hexStringToBytes()
case .Octal:
break
}
return Data(bytes)
}
// 十进制字符串转byte数组
func decStringToBytes() -> [UInt8] {
var bytes: [UInt8] = []
if self.count > 0, self.count % 2 == 0 {
var sum = 0
// 整形的 utf8 编码范围
let intRange = 48...57
for (index, c) in self.utf8CString.enumerated() {
var intC = Int(c.byteSwapped)
if intC == 0 {
break
} else if intRange.contains(intC) {
intC -= 48
} else {
print("字符串格式不对，每个字符都需要在0~9内")
break
}
sum = sum * 10 + intC
if index % 2 != 0 {
bytes.append(UInt8(sum))
sum = 0
}
}
}
return bytes
}
// 十六进制字符串转byte数组
func hexStringToBytes() -> [UInt8] {
var bytes: [UInt8] = []
if self.count > 0, self.count % 2 == 0 {
var sum = 0
for (index, c) in self.utf8CString.enumerated() {
var intC = Int(c.byteSwapped)
if intC == 0 {
break
} else if String.intRange.contains(intC) {
intC -= 48
} else if String.lowercaseRange.contains(intC) {
intC -= 87
} else if String.uppercasedRange.contains(intC) {
intC -= 55
} else {
print("字符串格式不对，每个字符都需要在0~9，a~f，A~F内")
break
}
sum = sum * 16 + intC
// 每两个十六进制字母代表8位，即一个字节
if index % 2 != 0 {
bytes.append(UInt8(sum))
sum = 0
}
}
}
return bytes
}
// 单个十六进制转十进制
func hexToDec() -> Int {
var result = -1
if self.count > 0 {
for c in self.utf8 {
var i = Int(c.byteSwapped)
if i == 0 {
result = 0
}else if String.intRange.contains(i) {
i -= 48
}else if String.lowercaseRange.contains(i) {
i -= 87
}else if String.uppercasedRange.contains(i) {
i -= 55
}else {
break
}
result = result * 16 + i
}
}
return result
}
// 取子字符串数组
func substrings(_ subCount: Int) -> [String] {
var result = [String]()
if self.count > 0 {
// 分组
var count = self.count / subCount
let remainder = self.count % subCount
if remainder > 0 {
count += 1
}
for i in 0.. [Character] {
var result = [Character]()
if self.count > 0 {
for char in self {
result.append(char)
}
}
return result
}
}
