IOS對日期進行排序

IOS對日期進行排序

 

NSMutableArray *array = [[NSMutableArray alloc] initWithObjects:@"2019/03/01/",@"2013/03/02",@"2013/03/07",@"2014/03/01/", [NSNull null], nil];        array = (NSMutableArray *)[array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        [formatter setDateFormat:@"yyyy/MM/dd/"];        if (obj1 == [NSNull null]) {            obj1 = @"0000/00/00";        }        if (obj2 == [NSNull null]) {            obj2 = @"0000/00/00";        }        NSDate *date1 = [formatter dateFromString:obj1];        NSDate *date2 = [formatter dateFromString:obj2];        NSComparisonResult result = [date1 compare:date2];        return result == NSOrderedAscending;    }];    for (int i = 0; i < [array count]; i++) {        NSLog(@"%@", [array objectAtIndex:i]);    }

在項目裡需要對資料進行排序，這裡類比一個數組，由於項目中返回的json的key對應的value為空白，所以排序的時候需要判斷obj1和obj2是否為空白，還有升序和降序的問題根據

 

 

return result == NSOrderedAscending;  升序

 

 

return result == NSOrderedDescending; 降序

升序結果：

 

 

2015-06-16 17:16:14.930 TestH5[15888:669365] 2019/03/01/2015-06-16 17:16:14.930 TestH5[15888:669365] 2014/03/01/2015-06-16 17:16:14.931 TestH5[15888:669365] 2013/03/072015-06-16 17:16:14.931 TestH5[15888:669365] 2013/03/022015-06-16 17:16:14.931 TestH5[15888:669365] 

降序結果：

 

 

2015-06-16 17:17:21.692 TestH5[15946:671080] 2013/03/022015-06-16 17:17:21.692 TestH5[15946:671080] 2013/03/072015-06-16 17:17:21.692 TestH5[15946:671080] 2014/03/01/2015-06-16 17:17:21.692 TestH5[15946:671080] 2019/03/01/2015-06-16 17:17:21.692 TestH5[15946:671080]