Objective-c Array Passing

leothenerd 7:08 pm on December 14, 2009 | Answers: 1    
Tags: array (11), objective-c (4)

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• leothenerd 7:08 pm on December 14, 2009
  

  you can pass a C array to a method:

  
  - (void) ookie: (int *) snork {
      NSLog (@"%d %d %d", snork[0], snork[1], snork[2]);
  } // ookie
  

  Or use the [] syntax:

  
  - (void) ookie2: (int[]) snork;
  

  or use the explicit size syntax (which doesn’t really matter for 1-D arrays):

  
  - (void) ookie3: (int[17]) snork;
  

  And you can pass in pointers to pointers to pass back a resized array originally allocated by malloc:

  
  - (void) ookie4: (int**) snork
           growTo: (int) elements {
  
      *snork = realloc(*snork, sizeof(int) * elements);
      (*snork)[0] = 55;
  
      NSLog (@"(%d) %d %d %d", sizeof(snork), (*snork)[0], (*snork)[1], (*snork)[2]);
  
  } // ookie4
  

  Passing in arrays of Objective-C types:

  
  - (void) ookie: (NSString **) snork {
      NSLog (@"%@ %@", snork[0], snork[1]);
  } // ookie