开发环境
Mac OS 10.12+ / Xcode 9+ / Swift 4.0
支持环境
iOS 8+， iPhone & iPad
项目获取
- 项目已上传至GitHub中 ZTSimplifiedString,若要使用，下载后导入您的项目。
- 把
ZTSimpleString.swift此文件拖入项目之后就可直接使用。
如何使用
通过整数下标获取与修改字符串的某个字符
- 源码展示
/// 字符串名[n]: 修改与获取字符串某个字符
///
/// - Parameter index: 下标整数
subscript(index: Int) -> Character {
set {
guard index >= 0 && index < self.count else {
assertionFailure("The subscript has beyond [0,\(self.count-1)]")
return
}
let startIndex = self.startIndex;
let startPath = self.index(startIndex, offsetBy:index)
let endPath = self.index(after: startPath)
let range = startPath ..< endPath
self.replaceSubrange(range, with: String(newValue))
}
get {
var character:Character = "0"
guard index < self.count else {
assertionFailure("The subscript has beyond [0,\(self.count-1)]")
return character
}
let startIndex = self.startIndex;
let indexPath = self.index(startIndex, offsetBy:index)
character = self.characters[indexPath]
return character
}
}
-
使用示例
var example = "ABCDEFG" example[0] = "1" print(example) //1BCDEFG print(example[0]) //输出1
通过整数范围下标获取与修改字符串某个范围内的子串
-
源码展示
/// 字符串名[n,m]:获取、修改和删除 /// /// - Parameters: /// - startIndex: 下标整数 /// - endIndex: 下标整数 subscript(_ startIndex:Int ,_ endIndex:Int) -> String { set { var min = startIndex var max = endIndex guard (min >= 0 && min < self.count) && (max >= 0 && max < self.count) else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return } if min > max { (min,max) = (max,min) } let firstIndex = self.startIndex; let startPath = self.index(firstIndex, offsetBy:min) let endPath = self.index(firstIndex, offsetBy:max) let range = startPath ... endPath self.replaceSubrange(range, with: newValue) } get { var min = startIndex var max = endIndex var newString = String() guard (min >= 0 && min < self.count) && (max >= 0 && max < self.count) else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return newString } if min > max { (min,max) = (max,min) } let firstIndex = self.startIndex; let startPath = self.index(firstIndex, offsetBy:min) let endPath = self.index(firstIndex, offsetBy:max) let range = startPath ... endPath newString = String(self[range]) return newString } } /// 字符串名[n...m]: 获取与修改相应的子串 /// /// - Parameter closeRange: 无符号封闭整型范围 subscript(_ closeRange:ClosedRange<Int>) -> String { set { self[closeRange.lowerBound,closeRange.upperBound] = newValue } get { return String(self[closeRange.lowerBound,closeRange.upperBound]) } } /// 字符串名[n..<m]: 获取与修改相应的子串 /// /// - Parameter closeRange: 无符号半封闭整型范围 subscript(_ subRange:Range<Int>) -> String { set { self[subRange.lowerBound,subRange.upperBound-1] = newValue } get { return String(self[subRange.lowerBound,subRange.upperBound-1]) } } -
使用示例
var example = "ABCDEFG" print(example[0,1]) //输出：AB :全封闭区间 print(example[1..<3]) //输出：BC print(example[3...5]) //输出：DEF example[0,1] = "12" example[2..<4] = "34" //example[5...7] = "567" //报下标越界error example[4...6] = "567" print(example) //输出：1234567 example[0,2] = "" //另类的删除 print(example) //输出：4567
通过整数下标插入字符或字符串
-
源码展示
/// 用对应下标的整数来插入字符 /// /// - Parameters: /// - newString: 需插入的字符 /// - index: 相应下标整数 mutating func insert(_ newCharacter:Character, at index:Int) { guard index >= 0 && index < self.count else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return } //dealStr[index,index] = newString; //也可以这样通过下标来插入，但需保持两个下标相等 let firstIndex = self.startIndex; let indexpath = self.index(firstIndex, offsetBy:index) self.insert(newCharacter, at: indexpath) } /// 用对应下标的整数来插入字符串 /// /// - Parameters: /// - newString: 需插入的字符串 /// - index: 相应下标整数 mutating func insert(_ newString:String, at index:Int) { guard index >= 0 && index < self.count else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return } //dealStr[index,index] = newString; //也可以这样通过下标来插入，但需保持两个下标相等 let firstIndex = self.startIndex; let indexpath = self.index(firstIndex, offsetBy:index) self.insert(contentsOf: newString, at: indexpath) } -
使用示例
var example = "ABCDEFG" example.insert("0", at: 0) print(example) //输出: 0ABCDEFG example.insert("zt", at: example.count-1) print(example) //输出：0ABCDEFztG
通过整数下标删除字符或字符串
-
源码展示
/// 删除对应下标整数的字符 /// /// - Parameter index: 下标整数 /// - Returns: 删除的字符 mutating func remove(i index: Int) -> Character { var character:Character = "0" guard index >= 0 && index < self.count else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return character } let indexPath = self.index(self.startIndex, offsetBy: index) character = self.remove(at: indexPath) return character } /// 给出范围整数，删除该范围的字符串(全封闭区间) /// /// - Parameters: /// - startIndex: 初始下标 /// - endIndex: 结尾下标 mutating func remove(from startIndex:Int, to endIndex:Int) { var min = startIndex var max = endIndex guard (min >= 0 && min < self.count) && (max >= 0 && max < self.count) else { assertionFailure("The subscript has beyond [0,\(self.count-1)]") return } if min > max { (min,max) = (max,min) } let firstIndex = self.startIndex; let startPath = self.index(firstIndex, offsetBy:min) let endPath = self.index(firstIndex, offsetBy:max) let range = startPath ... endPath self.removeSubrange(range) } /// n...m: 删除此范围的字符串 /// /// - Parameter closeRange: n...m mutating func removeRange(_ closeRange:ClosedRange<Int>) { self.remove(from: closeRange.lowerBound, to: closeRange.upperBound) } /// n..<m: 删除此范围的字符串 /// /// - Parameter closeRange: n..<m mutating func removeRange(_ subRange:Range<Int>) { self.remove(from: subRange.lowerBound, to: subRange.upperBound-1) } -
使用示例
var example = "ABCDEFG" example.remove(i: 0) print(example) //输出：BCDEFG example.remove(from: 0, to: 1) //删除全封闭的区间 print(example) //输出：DEFG example.removeRange(0...1) print(example) //输出：FG example.removeRange(0..<1) print(example) //输出：G
如有错误 欢迎指正
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