swift string all digit
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swift string check all digit
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然后用了：
var isAllDigits: Bool { var isAll = true for eachChar in self.characters { if !((eachChar >= "1") && (eachChar <= "9")){ isAll = false break } } return isAll } |
完整代码：
extension String { var containsChineseCharacters: Bool { return self.rangeOfString("\\p{Han}", options: .RegularExpressionSearch) != nil } var isAllChineseCharacters: Bool { var isAll = false if let chineseRangeIdx = self.rangeOfString("\\p{Han}+", options: .RegularExpressionSearch) { print("chineseRangeIdx=\(chineseRangeIdx)") let chineseSubStr = self.substringWithRange(chineseRangeIdx) print("chineseSubStr=\(chineseSubStr)") if chineseSubStr == self { isAll = true } } return isAll } var isAllLetters: Bool { var isAll = true for eachChar in self.characters { if !( ((eachChar >= "A") && (eachChar <= "Z")) || ((eachChar >= "a") && (eachChar <= "z")) ){ isAll = false break } } return isAll } var isAllDigits: Bool { var isAll = true for eachChar in self.characters { if !((eachChar >= "1") && (eachChar <= "9")){ isAll = false break } } return isAll } } |
示例：
func genHeaderText(headerName:String) -> String { print("\r\ngenHeaderText") var headerText = "" //if all chinese name, get last one cn char if headerName.isAllChineseCharacters { print("\(headerName) isAllChineseCharacters") headerText = getLastChar(headerName) }else if headerName.isAllLetters { print("\(headerName) isAllLetters") let firstTwoChar = (headerName as NSString).substringToIndex(2) print("firstTwoChar=\(firstTwoChar)") headerText = firstTwoChar.uppercaseString }else if headerName.isAllDigits { print("\(headerName) isAllDigits") headerText = (headerName as NSString).substringToIndex(2) }else if headerName.containsString(" "){ print("\(headerName) contain empty space") let subStrArr:[String] = splitSingleStrToStrArr(headerName, seperatorStr: " ") print("subStrArr=\(subStrArr)") if subStrArr.count >= 2 { let firstStr = subStrArr[0] let secondStr = subStrArr[1] print("firstStr=\(firstStr), secondStr=\(secondStr)") let firstChar = getFirstChar(firstStr) let sencondChar = getFirstChar(secondStr) print("firstChar=\(firstChar), sencondChar=\(sencondChar)") let mergedTwoChar = firstChar + sencondChar print("mergedTwoChar=\(mergedTwoChar)") headerText = mergedTwoChar.uppercaseString } }else{ let firstTwoChar = (headerName as NSString).substringToIndex(2) print("firstTwoChar=\(firstTwoChar)") headerText = firstTwoChar.uppercaseString } print("\(headerName) -> \(headerText)") return headerText } genHeaderText("2937518054189267") |
输出：
genHeaderText firstTwoChar=29 2937518054189267 -> 29 |
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