使用NSSortDescriptor对NSString值进行排序，如同NSInteger [英] Sorting NSString values as if NSInteger using NSSortDescriptor

问题描述

我创建了一个排序描述符，对来自我的服务器的plist响应进行排序。这对于值为高达9的排序键很有效。对于超过10个项目，我看到排序键排序为1，10，11，2，3，4，5，6，7，8， / p>

I have created a sort descriptor to sort a plist response coming from my server. This works well with sort key having values upto 9. With more than 10 items I see abrupt results with sort key arranged in the order = 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

NSSortDescriptor *aSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"sort" ascending:YES];
self.myList = [NSMutableArray arrayWithArray:[unsortedList sortedArrayUsingDescriptors:[NSArray arrayWithObject:aSortDescriptor]]];

如何使其按照正确的顺序排列：1，2，3，4，5，6 ，7,8,9,10,11？

How to make it arrange in the correct order of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11?

推荐答案

您可以通过实现一个自定义比较器块来创建 NSSortDescriptor ：

You can do this by implementing a custom comparator block when creating your NSSortDescriptor:

NSSortDescriptor *aSortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"sort" ascending:YES comparator:^(id obj1, id obj2) {

    if ([obj1 integerValue] > [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedDescending;
    }
    if ([obj1 integerValue] < [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedAscending;
    }
    return (NSComparisonResult)NSOrderedSame;
}];
self.myList = [NSMutableArray arrayWithArray:[unsortedList sortedArrayUsingDescriptors:[NSArray arrayWithObject:aSortDescriptor]]];

请参阅Apple文档在这里

See Apple documentation here

这篇关于使用NSSortDescriptor对NSString值进行排序，如同NSInteger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！