关于排序：iOS-SortDescriptor，其中内容既是字母又是数字

iOS - SortDescriptor where content is both alpha and numeric

我见过很多关于如何对1,10,2,3等进行排序的问题。

我有一些以以下形式导入的Json数据：@"arrived"，@"boarding"，@"1"，@"2"，@"3"等。

我目前只有一个不区分大小写的排序：

1	sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"time" ascending:YES selector:@selector(caseInsensitiveCompare:)];

在上面需要的形式中，这会首先对数字进行排序，然后对单词进行排序。

我必须执行哪些选择？谢谢

相关讨论

这个冗长的比较器可以解决这个问题：

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NSArray *testArray = @[@"3", @"boarding", @"2", @"arrived", @"1"];

NSArray *sortedArray = [testArray sortedArrayUsingComparator:^NSComparisonResult(NSString *obj1, NSString *obj2) {
NSInteger firstInteger = 0;
BOOL isInteger1 = [[NSScanner scannerWithString:obj1] scanInteger:&firstInteger];

NSInteger secondInteger = 0;
BOOL isInteger2 = [[NSScanner scannerWithString:obj2] scanInteger:&secondInteger];

if (isInteger1 && isInteger2) {
// Normal integer comparison
if (firstInteger > secondInteger) {
return NSOrderedDescending;
}
else if (secondInteger > firstInteger) {
return NSOrderedAscending;
}
else {
return NSOrderedSame;
}
}
else if (isInteger1) {
return NSOrderedDescending;
}
else if (isInteger2) {
return NSOrderedAscending;
}
else {
return [obj1 compare:obj2 options:NSCaseInsensitiveSearch];
}
}];

编辑

样本输出：

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Printing description of sortedArray:
<__NSArrayI 0x7ffacaa26da0>(
arrived,
boarding,
1,
2,
3

相关讨论

试试这个

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NSComparator compare=^(id obj1, id obj2) {
NSString *s1 = [obj1 substringToIndex:1];
NSString *s2 = [obj2 substringToIndex:1];

NSRange r1 = [s1 rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]];
NSRange r2 = [s2 rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]];
if (r1.location == r2.location ) { // either both start with a number or both with a letter
return [obj1 compare:obj2 options:NSDiacriticInsensitiveSearch|NSCaseInsensitiveSearch];
} else { // one starts wit a letter, the other with a number
if ([s1 rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]].location == NSNotFound) {
return NSOrderedAscending;
}
return NSOrderedDescending;
}
};

NSSortDescriptor *desc=[[NSSortDescriptor alloc]initWithKey:@"time" ascending:YES comparator:compare];

originalArray = [originalArray sortedArrayUsingDescriptors:@[desc]];

可能会帮助您。