如何以相同的方式改變NSMutable數組的順序

Question

我有三個arrays。他們是名，生日和剩餘天象下面這樣：

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 

我要重新排列的剩餘天array升序排列， 但同時名和生日也應該以相同的方式重新排序。

見下面這個例子：

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]]; 

中的tableView上市使用此

- (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

把每一行到詞典，進出這些字典到一個數組。然後使用謂詞或排序塊排序。如果你想要一個僅包含例如分類名稱的數組，你可以使用[ array valueForKeyPath:@"name" ]

陣列的樣子：

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

Answer 3

如您MutableArray是Dictionarys array，您可以使用sortUsingComparator 到數組排序

[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，我有一個測試：

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); 
}]; 

那麼輸出是：

Answer 4

使用NSMutableDictionary將數據存儲到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]; 
} 

這裏你安排名數組，使用搜索選項使用名稱不使用索引和 使用NSPredicate搜索數據後在NSMutableArray

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

Answer 5

一次嘗試這樣it'l幫助你，

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);