@implementationRootViewController
@synthesizearray;-(void)viewDidLoad {[super viewDidLoad];/* Adding the button */self.navigationItem.rightBarButtonItem =[[UIBarButtonItem alloc]initWithTitle:@"Load"style:UIBarButtonItemStyleDone
target:selfaction:@selector(loadData)];/* Initialize our array */NSMutableArray*_array =[[NSMutableArrayalloc]initWithCapacity:10000];
self.array=_array;
[_array release];
}// Fires when the user presses the load button-(void)loadData {/* Grab web data */NSURL*dataURL =[NSURLURLWithString:@"http://icodeblog.com/samples/nsoperation/data.plist"];NSArray*tmp_array =[NSArrayarrayWithContentsOfURL:dataURL];/* Populate our array with the web data */for(NSString*str intmp_array){[self.arrayaddObject:str];
}/* reload the table */[self.tableViewreloadData];
}#pragma mark Table view methods-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{return1;
}-(NSInteger)tableView:(UITableView *)tableViewnumberOfRowsInSection:(NSInteger)section {return[self.arraycount];
}-(UITableViewCell *)tableView:(UITableView *)tableViewcellForRowAtIndexPath:(NSIndexPath*)indexPath {staticNSString*CellIdentifier =@"Cell";UITableViewCell *cell=[tableViewdequeueReusableCellWithIdentifier:CellIdentifier];
if(cell==nil){cell=[[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier]autorelease];
}/* Display the text of the array */[cell.textLabel setText:[self.arrayobjectAtIndex:indexPath.row]];returncell;
}-(void)dealloc{[super dealloc];
[arrayrelease];
}@end

NSOperationQueue*queue =[NSOperationQueuenew];NSInvocationOperation*operation=[[NSInvocationOperationalloc]initWithTarget:selfselector:@selector(methodToCall)object:objectToPassToMethod];[queue addOperation:operation];
[operationrelease];

@implementationRootViewController
@synthesizearray;-(void)viewDidLoad {[super viewDidLoad];self.navigationItem.rightBarButtonItem =[[UIBarButtonItem alloc]initWithTitle:@"Load"style:UIBarButtonItemStyleDonetarget:selfaction:@selector(loadData)];NSMutableArray*_array =[[NSMutableArrayalloc]initWithCapacity:10000];self.array=_array;[_array release];
}-(void)loadData {/* Operation Queue init (autorelease) */NSOperationQueue*queue =[NSOperationQueuenew];/* Create our NSInvocationOperation to call loadDataWithOperation, passing in nil */NSInvocationOperation*operation=[[NSInvocationOperationalloc]initWithTarget:selfselector:@selector(loadDataWithOperation)object:nil];/* Add the operation to the queue */[queue addOperation:operation];[operationrelease];
}-(void)loadDataWithOperation {NSURL*dataURL =[NSURLURLWithString:@"http://icodeblog.com/samples/nsoperation/data.plist"];NSArray*tmp_array =[NSArrayarrayWithContentsOfURL:dataURL];for(NSString*str intmp_array){[self.arrayaddObject:str];}[self.tableViewreloadData];
}#pragma mark Table view methods-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{return1;
}-(NSInteger)tableView:(UITableView *)tableViewnumberOfRowsInSection:(NSInteger)section {return[self.arraycount];
}-(UITableViewCell *)tableView:(UITableView *)tableViewcellForRowAtIndexPath:(NSIndexPath*)indexPath {staticNSString*CellIdentifier =@"Cell";UITableViewCell *cell=[tableViewdequeueReusableCellWithIdentifier:CellIdentifier];if(cell==nil){cell=[[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];}[cell.textLabel setText:[self.arrayobjectAtIndex:indexPath.row]];returncell;
}-(void)dealloc{[super dealloc];[arrayrelease];
}