我在加载一些数据时显示了一个UIAlertView带有“Please Wait”文本，让用户知道现在正在处理某些内容。
所以我将UIAlertView隐藏在 - （UITableViewCell *）tableView :( UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath函数如下
所以现在我需要知道的是我是否以正确的方式处理NSOperationQueue？或者我在使用NSOperationQueue
这是我的代码。请让我知道你的想法。
由于
-(void)buttonPressed
{
alertLoading =[[UIAlertView alloc] initWithTitle:@"Loading Data" message:@"Please wait..." delegate:self cancelButtonTitle:nil otherButtonTitles:nil];
av=[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[av startAnimating];
[av setFrame:CGRectMake(125, 70, 37, 37)];
//[self.view addSubview:alertLoading];
[alertLoading show];
[alertLoading addSubview:av];
[av release];
NSOperationQueue *queue = [NSOperationQueue new];
NSInvocationOperation *operation = [[NSInvocationOperation alloc]
initWithTarget:self
selector:@selector(parsing)
object:nil];
[queue addOperation:operation];
[operation release];
[queue release];
}
-(void)parsing
{
NSString *searchUrl = [NSString stringWithFormat:@"%@profile.php?type=list&logged_id=%@&start=%d& rows=%d",ConstantURL,Reg_UserId_Trim,row_index,per_page];
NSURL *xmlURL = [NSURL URLWithString:searchUrl];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
parserXML =[[XMLParser alloc]initXMLParser];
profileName = [[ProfileName alloc]init];
myProfileParser =[[MyProfileParser alloc]initMyProfileParser];
//set the Delegate
[xmlParser setDelegate:parserXML];
BOOL success = [xmlParser parse];
if (success)
{
NSLog(@"Successfully Executed");
[myTableView reloadData];
}
else
{
NSLog(@"Error is occured");
}
[av stopAnimating];
[self performSelectorOnMainThread:@selector(loadPageDetails) withObject:nil waitUntilDone:NO];
[myTableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:YES];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
}
[alertLoading dismissWithClickedButtonIndex:0 animated:YES];
return cell;
}