iphone - How to create Enemies class in cocos2d -

i using cocos2d iphone want create class enemies

see code

 #import <foundation/foundation.h>  #import "cocos2d.h"   @interface enemies : ccsprite {       float imageheight;  }  @property float imageheight;  +(id) enemies;  @end   @implementation enemies @synthesize imageheight;  +(id) enemies{  return [[[self alloc] initwithfile:@"enemy.png"] autorelease]; } @end  

i want set imageheight

float imageheight = [enemy texture].contentsize.height;  

so whenever create instance of class enemies should have imageheight set properly?

thanks

note: trying improve this code

ahmed, keep enemies method same, , add class:

-(id) init {      if (self = [super init]) {         float textureheight = [enemy texture].contentsize.height;         [self setimageheight:textureheight];     }     return self; } 

this set imageheight new instances of enemies class.