Question

我想只在字符串包含数字的情况下将字符串中的数字和字符分开，否则我不想将其拆分。

例如：

String1 = @"hai 1234";

我想将此字符串拆分为

String2 = 1234
String3 = hai;

另一个例子：

String1 = @"hai"

我不想分手。

Answer 1

使用以下代码拆分Characters＆amp; Numbers

//Numbers

    NSString *numbers = [@"hai 1234" stringByTrimmingCharactersInSet:[NSCharacterSet letterCharacterSet]];

//Characters

    NSString *characters = [@"hai 1234" stringByTrimmingCharactersInSet:[NSCharacterSet decimalDigitCharacterSet]];

Answer 2

这个问题是重复的。 Objective-C: Find numbers in string

// Input
NSString *originalString = @"This is my string. #1234";

// Intermediate
NSString *numberString;

NSScanner *scanner = [NSScanner scannerWithString:originalString];
NSCharacterSet *numbers = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];

// Throw away characters before the first number.
[scanner scanUpToCharactersFromSet:numbers intoString:NULL];

// Collect numbers.
[scanner scanCharactersFromSet:numbers intoString:&numberString];

// Result.
int number = [numberString integerValue];

// Text
NSString *text = [originalString stringByReplacingOccurrencesOfString:numberString withString:@""];

Answer 3

   //number 
     NSString *onlyNumbers = [[string1 componentsSeparatedByCharactersInSet:
                    [[NSCharacterSet decimalDigitCharacterSet] invertedSet]] 
                    componentsJoinedByString:@""];

   //characters

    NSString *onlyCharacters = [[string1 componentsSeparatedByCharactersInSet:
                                [[NSCharacterSet letterCharacterSet] invertedSet]] componentsJoinedByString:@""];

拆分字符串中的数字和字符

3 个答案: