第一種方法：
[array sortUsingSelector:@selector(compareNsdate)]
- (NSComparisonResult)compareNsdate
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSMutableArray *tempArray = [NSMutableArray array];
for (NSString *dateString in dateArray) {
NSDate *date = [formatter dateFromString:dateString];
[tempArray addObject:date];
}
[tempArray sortUsingComparator:^NSComparisonResult(NSDate *date1, NSDate *date2) {
return [date2 compare:date1];
}];
}
第二種方法：
NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"self"
ascending:NO];
NSArray *descriptors = [NSArray arrayWithObject:descriptor];
NSArray *reverseOrder = [DateArr sortedArrayUsingDescriptors:descriptors];
