如何以同样的方式改变NSMutable数组的顺序，另一个可变数组发生了变化

我有三个arrays 。 他们是名字 ， 生日和剩下的天如下：

  name birthdate remaining "Abhi Shah", "01/14", 300 "Akash Parikh", "12/09/1989", 264 "Anand Kapadiya", "12/01", 256 "Annabella Faith Perez", "03/02", 347 "Aysu Can", "04/14/1992", 25 "Chirag Pandya" "10/07/1987" 201 

我想重新排列剩下的天数，按照升序排列，但同时名字和出生date也应该以相同的方式重新sorting。

看下面这个例子：

  name birthdate remaining "Aysu Can", "04/14/1992", 25 "Chirag Pandya" "10/07/1987" 201 "etc..." 

Answer 1

  self.arrayForRows = [[NSMutableArray alloc]init]; NSMutableArray *arrayForNames = [[NSMutableArray alloc]initWithObjects:@"Abhi Shah",@"Akash",@"Nagavendra",@"Ramana",@"Simhachalam", nil]; NSMutableArray *arrayForBirthDates = [[NSMutableArray alloc]initWithObjects:@"01/14/94",@"01/14",@"11/07/87",@"12/07/89",@"23/08/91", nil]; NSMutableArray *arrayForRemaining = [[NSMutableArray alloc]initWithObjects:@"200",@"320",@"32",@"450",@"14", nil]; for (int i=0; i<arrayForBirthDates.count; i++) { NSMutableDictionary *tempDicts = [[NSMutableDictionary alloc]init]; [tempDicts setObject:[arrayForNames objectAtIndex:i] forKey:@"names"]; [tempDicts setObject:[arrayForBirthDates objectAtIndex:i] forKey:@"birth"]; [tempDicts setObject:[NSNumber numberWithInt:[[arrayForRemaining objectAtIndex:i] intValue]] forKey:@"remaining"]; [self.arrayForRows addObject:tempDicts]; } NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"remaining" ascending:YES]; [self.arrayForRows sortUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]]; 

在tableView列表中使用这个

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [self.arrayForRows count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifer = @"cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifer]; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifer]; } cell.textLabel.text = [[self.arrayForRows objectAtIndex:indexPath.row] valueForKey:@"names"]; return cell; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } 

Answer 2

使用NSMutableDictionary将数据存储到NSMutableArray

 NSMutableArray *array=[[NSMutableArray alloc]init]; for (int i=0; i<totalRows; i++) { NSMutableDictionary *dic=[[NSMutableDictionary alloc]init]; [dic setValue:[array_1 objectAtIndex:i] forKey:@"names"]; [dic setValue:[array_2 objectAtIndex:i] forKey:@"birthdate "]; [dic setValue:[array_3 objectAtIndex:i] forKey:@"remanning"]; [array addObject:dic]; [dic release]; } 

这里你排列好名称数组后，使用search选项来使用名称不使用索引，并在NSMutableArray使用NSPredicatesearch数据

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"names matches[cd] %@", name]; NSArray *result = [array filteredArrayUsingPredicate:predicate]; NSMutableDictionary *dict = [[[result objectAtIndex:0] mutableCopy] autorelease]; NSLog(@"%@",dict);// result 

Answer 3

一旦尝试这样，它会帮助你，

  NSMutableDictionary *dict=[[NSMutableDictionary alloc]init]; [dict setObject:@"rahul" forKey:@"name"]; [dict setObject:@"10" forKey:@"value"]; NSMutableDictionary *dict1=[[NSMutableDictionary alloc]init]; [dict1 setObject:@"ttt" forKey:@"name"]; [dict1 setObject:@"6" forKey:@"value"]; NSMutableArray *ar=[[NSMutableArray alloc]init]; [ar addObject:dict]; [ar addObject:dict1]; NSSortDescriptor *Sorter = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:NO]; [ar sortUsingDescriptors:[NSArray arrayWithObject:Sorter]]; NSLog(@"---%@",ar); 

Answer 4

把每一行放到一个字典中，然后把这些字典放到一个数组中。 然后使用谓词或sorting块sorting。 如果你想要一个只包含sorting名称的数组，你可以使用[ array valueForKeyPath:@"name" ]

数组看起来像：

 [ { @"name" : ..., @"birthdate" : ...birthdate..., @"remaining" : ...days remaining... } , {...}, {...} ] 

Answer 5

比如你的MutableArray是一个Dictionarys array ，你可以使用sortUsingComparator对数组进行sorting

 [array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) { int a = [(NSNumber *)[(NSDictionary *)obj1 objectiveForKey: @"remanning"] intValue]; int b = [(NSNumber *)[(NSDictionary *)obj2 objectiveForKey: @"remanning"] intValue]; if (a < b) { return NSOrderedAscending; } else if(a == b) { return NSOrderedSame; } return NSOrderedDescending; }]; 

例如，我有一个testing：

 NSMutableArray *array = [[NSMutableArray alloc] initWithObjects:@(30),@(20),@(5),@(100), nil]; [array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) { int a = [(NSNumber *)obj1 intValue]; int b = [(NSNumber *)obj2 intValue]; if (a < b) { return NSOrderedAscending; } else if(a == b) { return NSOrderedSame; } return NSOrderedDescending; }]; [array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { NSLog(@"%@ , %d",obj,idx); }]; 

那么输出结果是：