如何在iOS中使用NSRange或NSScanner

Question

我有一个像这样的字符串：

1 this is my first text 2 his is my second 3 this is my third 4 this is my forth etc etc..

每个句子都位于数字characters like 1 2 3 4 etc之间， characters like 1 2 3 4 etc

当我点击第一个句子时，需要对其进行剖析并将其复制到剪贴板等内容中。 我们如何使用NSScanner或NSRange计算字符串大小或识别数字字符之间的字符串。

self.multiPageView.text = combined; 组合包含上面的文本，因此，当我点击第一个句子时，需要选择并显示一个与所敲击的句子相符的UIAlertView，作为第一个句子，如何通过敲击将该句子（如ibook）固定在数字字符之间的句子。 我正在使用核心文本来显示这些类型的文本。

Answer 1

使用NSScanner

NSString *yourString = @"1 this is my first text 2 his is my second 3 this is my third 4 this is my forth";

NSScanner *scanner = [NSScanner scannerWithString:yourString];

[scanner scanUpToString:@"1" intoString:nil];
if (![scanner isAtEnd]) {
    [scanner scanUpToString:@"1" intoString:nil];
    NSCharacterSet *charset = [NSCharacterSet characterSetWithCharactersInString:@"2"];
    [scanner scanUpToCharactersFromSet:charset intoString:&yourString];
}

Answer 2

试试这个，你会得到一个数组，其中所有的字符串都是分开的。 您必须使用您要使用的数字填充集合。

    NSString *str1 = @"1 this is my first text 2 his is my second 3 this is my third 4 this is my forth";
    NSMutableCharacterSet *set = [NSMutableCharacterSet controlCharacterSet];
    [set addCharactersInString:@"1"];
    [set addCharactersInString:@"2"];
    [set addCharactersInString:@"3"];
    [set addCharactersInString:@"4"];
    NSArray *arr = [str1 componentsSeparatedByCharactersInSet:set];