iVar LifeTime与Objective-C中的Property LifeTime相同

 @interface ViewController
 {

 NSMutableArray * GetPrices;

 }

-(void)viewWillAppear:(BOOL)animated
 {
 GetPrices=[[NSMutableArray alloc]init];
  // here I’m adding objects to the array..
 }

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
 @interface ViewController
 {

 NSMutableArray