我想使用SortDescriptor对带有IPv4地址的NSTableView列进行排序。我到目前为止:
NSArray *devicesSortDescriptor = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"ip" ascending:YES comparator:^NSComparisonResult(id ipstring1, id ipstring2) {
const char * ipch1 = [ipstring1 cStringUsingEncoding:NSASCIIStringEncoding];
const char * ipch2 = [ipstring2 cStringUsingEncoding:NSASCIIStringEncoding];
struct in_addr ip1, ip2;
inet_aton(ipch1, &ip1);
inet_aton(ipch2, &ip2);
if (ip1.s_addr > ip2.s_addr)
return NSOrderedDescending;
else if (ip1.s_addr == ip2.s_addr)
return NSOrderedSame;
else
return NSOrderedAscending;
}]];
这就是结果:
我做错了什么?我的意思是如果ip1.s_addr> ip2.s_addr然后它的原因是NSOrderedDescending .. o_O
谢谢!
答案 0 :(得分:2)
我刚刚发现,你需要的只是一个数字比较器:
<强>目标-C:强>
comparator:^(NSString *a, NSString *b) {
return [a compare:b options:NSNumericSearch];
}
<强>夫特:强>
comparator: {
(a, b) -> NSComparisonResult in
let result = a.compare(b as! String, options: NSStringCompareOptions.NumericSearch)
return result
}
:)