如何从包含以下格式的字符串的NSArray获取排序的NSArray"2.0.1"，"2.0.09"，"2.0.5". [英] How to get sorted NSArray from an NSArray that contains strings in this format "2.0.1", "2.0.09", "2.0.5"

问题描述

如何从包含具有两个小数点的数字字符串的NSArray中获取排序后的NSArray.谁能在这方面帮助我.预先感谢.

how to get the sorted NSArray from the NSArray that contains number string with two decimal points. Can anyone help me in this regard. Thanks in advance.

推荐答案

这应该为您解决问题:

NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];

NSArray *sortedArray = [unsortedArray sortedArrayUsingComparator:^(id obj1, id obj2) {
  if ([obj1 isKindOfClass:[NSString class]] && [obj2 isKindOfClass:[NSString class]]) {
    NSArray *obj1Components = [(NSString *)obj1 componentsSeparatedByString:@"."];
    NSArray *obj2Components = [(NSString *)obj2 componentsSeparatedByString:@"."];

    int highestCount = obj1Components.count;
    if (obj2Components.count > highestCount) {
        highestCount = obj2Components.count;
    }

    for (int i = 0; i < highestCount; i++) {

        // If the component does not exist, just make it 0
        NSNumber *num1 = [NSNumber numberWithInt:0];
        if (i < obj1Components.count) {
            num1 = [nf numberFromString:[obj1Components objectAtIndex:i]];
        }

        NSNumber *num2 = [NSNumber numberWithInt:0];
        if (i < obj2Components.count) {
            num2 = [nf numberFromString:[obj2Components objectAtIndex:i]];
        }

        int int1 = [num1 intValue];
        int int2 = [num2 intValue];

        if (int1 > int2) {
            return NSOrderedDescending;
        } else if (int2 > int1) {
            return NSOrderedAscending;
        }
    }

    // If we reach here, they're the same.
    return NSOrderedSame;

  } else {
      // They're not strings, so just say they're the same
      return NSOrderedSame;
  }
}];

[nf release];

它将需要类似["1.4.2"，"0.4.9"，"1"，"3.3.3.3.3"]的内容，并将其转换为["0.4.9"，"1"，"1.4.2，" 3.3.3.3.3]

It'll take something like ["1.4.2", "0.4.9", "1", "3.3.3.3.3"] and turn it into ["0.4.9", "1", "1.4.2", "3.3.3.3.3"]

这篇关于如何从包含以下格式的字符串的NSArray获取排序的NSArray"2.0.1"，"2.0.09"，"2.0.5".的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！