Question

如何从NSString中提取前3个字符？

例如，如果我有一个字符串“1234820”如何从字符串中提取数字123并将结果存储在格式为“1.23百万”的新字符串中？

我使用

计算字符串中的字符数

 -(NSString *)returnFormattedString:(NSString *)stringToFormat{


    NSString *formatedString;
    NSUInteger characterCount = [stringToFormat length];
    if (characterCount > 6) {
      //???? How do I extract and add a decimal

        stringWithThreeCharactersAndDecimal = ????;

        NSString *string = [NSString stringWithString:stringWithThreeCharactersAndDecimal];

    formatedString = [string stringByAppendingString:@"Million"];
    }
return formatedString;
}

Answer 1

喜欢

assume that is your String
 yourString = @"1234820";

// use substringToIndex for fetch First Three Character
yourString=[yourString substringToIndex:3];

// finally  convert string to as like 1.23
 NSString *finalStr = [NSString stringWithFormat:@"%.2f  Million", [yourString floatValue]];

选择-2

根据Droppys简短而且答案很好

 NSString *finalStr = [NSString stringWithFormat:@"%.2f  Million",  [yourString floatValue] / 100.0f];

如何从NSString中提取前3个字符？

1 个答案: