iOS开发——根据数组中的字典中的某一元素排序

- (void)sortWifiList {

NSArray *resultArray = [myDataArray sortedArrayUsingFunction:compare context:NULL];

[myDataArray removeAllObjects];

[myDataArray addObjectsFromArray:resultArray];

}

NSComparisonResult compare(NSDictionary *firstDict, NSDictionary *secondDict, void *context) {

if ([[firstDict objectForKey:@"SSIDSortKey"] intValue] < [[secondDict objectForKey:@"SSIDSortKey"] intValue])

return NSOrderedAscending;

else if ([[firstDict objectForKey:@"SSIDSortKey"] intValue] > [[secondDict objectForKey:@"SSIDSortKey"] intValue])

return NSOrderedDescending;

else

return NSOrderedSame;

}