NSMutableArray All Versions

Examples

• 1

  Creating an NSMutableArray
  1

  NSMutableArray can be initialized as an empty array like this:

  NSMutableArray *array = [[NSMutableArray alloc] init];
  // or
  NSMutableArray *array2 = @[].mutableCopy;
  // or
  NSMutableArray *array3 = [NSMutableArray array];
  

  NSMutableArray can be initialized with another array like this:

  NSMutableArray *array4 = [[NSMutableArray alloc] initWithArray:anotherArray];
  // or
  NSMutableArray *array5 = anotherArray.mutableCopy; 
  

  edited Jul 28 '16 at 12:03

  

  

  

  
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• 1

  Sorting Arrays
  1

  NSMutableArray *myColors = [NSMutableArray arrayWithObjects: @"red", @"green", @"blue", @"yellow", nil];
  NSArray *sortedArray;
  sortedArray = [myColors sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
  

  edited Jul 22 '16 at 7:22

  

  
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• 0

  Adding elements
  0

  NSMutableArray *myColors;
  myColors = [NSMutableArray arrayWithObjects: @"Red", @"Green", @"Blue", @"Yellow", nil];
  [myColors addObject: @"Indigo"];
  [myColors addObject: @"Violet"];
  
  //Add objects from an NSArray
  NSArray *myArray = @[@"Purple",@"Orange"];
  [myColors addObjectsFromArray:myArray];
  

  edited Jul 22 '16 at 13:47

  

  

  
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• 0

  Deleting Elements
  0

  Remove at specific index:

  [myColors removeObjectAtIndex: 3];
  

  Remove the first instance of a specific object:

  [myColors removeObject: @"Red"];
  

  Remove all instances of a specific object:

  [myColors removeObjectIdenticalTo: @"Red"];
  

  Remove all objects:

  [myColors removeAllObjects];
  

  Remove last object:

  [myColors removeLastObject];
  

  edited Jul 22 '16 at 7:22

  

  
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• 0

  Filtering Array content with Predicate
  0

  Using filterUsingPredicate: This Evaluates a given predicate against the arrays content and return objects that match.

  Example:

        NSMutableArray *array = [NSMutableArray array];
        [array setArray:@[@"iOS",@"macOS",@"tvOS"]];
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'i'"];
        NSArray *resultArray = [array filteredArrayUsingPredicate:predicate];
        NSLog(@"%@",resultArray);
  

  created Jul 22 '16 at 10:16

  
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• 0

  Insert Elements
  0

  NSMutableArray *myColors;
  int i;
  int count;
  myColors = [NSMutableArray arrayWithObjects: @"Red", @"Green", @"Blue", @"Yellow", nil];
  [myColors insertObject: @"Indigo" atIndex: 1];
  [myColors insertObject: @"Violet" atIndex: 3];
  

  edited Jul 22 '16 at 7:22

  

  
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• 0

  Move object to another index
  0

  Move Blue to the beginning of the array:

  NSMutableArray *myColors = [NSMutableArray arrayWithObjects: @"Red", @"Green", @"Blue", @"Yellow", nil];
  
  NSUInteger fromIndex = 2;
  NSUInteger toIndex = 0;
  
  id blue = [[[self.array objectAtIndex:fromIndex] retain] autorelease];
  [self.array removeObjectAtIndex:fromIndex];
  [self.array insertObject:blue atIndex:toIndex];
  

  myColors is now [@"Blue", @"Red", @"Green", @"Yellow"].

  edited Jul 22 '16 at 7:22

  

  

  
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