how to clear a data in tableviewcell again start reload? - objective-c

Question

i'm developing a bluetooth apps.1) I want to hide a tableview when i start the apps..after i pressed a action button i want to enable a tableview.. 2)if i again press a action button means tableviewcell clear the data and show empty before searching..give me an idea..
some of the code-
- (IBAction)connectButtonTouched:(id)sender
{
[self.deviceTable reloadData];
self.connectButton.enabled = YES;
[self.deviceTable reloadData];
peripheralManager = [[PeripheralManager alloc] init];
peripheralManager.delegate = self;
[peripheralManager scanForPeripheralsAndConnect];
[self.deviceTable reloadData];
[NSTimer scheduledTimerWithTimeInterval:(float)5.0 target:self selector:#selector (connectionTimer:) userInfo:nil repeats:YES];
alert=[[UIAlertView alloc] initWithTitle:#"Bluetooth" message:#"Scanning" delegate:nil cancelButtonTitle:#"Cancel" otherButtonTitles:nil];
UIActivityIndicatorView *progress=[[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
[alert addSubview:progress];
[progress startAnimating];
[alert show];
}
tableview
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [device count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier=#"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell==nil)
{
cell =[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text=[device objectAtIndex:indexPath.row];
cell.accessoryType=UITableViewCellAccessoryDetailDisclosureButton;
return cell;
}
TableView Delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell=[tableView cellForRowAtIndexPath:indexPath];
[self performSegueWithIdentifier:#"TableDetails" sender:tableView];
}

Answer 1

1.If you want to hide table View before clicking a button you can use
tableView.hidden=YES;
and inside
- (IBAction)connectButtonTouched:(id)sender, you can make it visible by using
tableView.hidden=NO;
[tableView reloadData]
OR
2.If you are developing app for iPad, then you can use UIPopOverController to show the data. You can load the tableView inside UIPopOverController when button is clicked.

Answer 2

Add BOOL flag in .h file
Now in ViewDidLoad add this:
flag = FALSE;
in tableview delegate method
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(flag)
return [device count];
else
return 0;
}
In your button action method:
- (IBAction)connectButtonTouched:(id)sender
{
if(!flag)
flag = TRUE;
else
flag = FALSE;
[self.deviceTable reloadData];
//your other code here
}

Answer 3

if they are in the same view, why not give the tableView a alpha of 0 and userInteractionEnabled = NO ?
Although, I think it would be easier if, instead of linking your tableView from interface builder, keep it as a member and initialize/reinitialize it when you tap your button.
something like:
`- (IBAction)connectButtonTouched:(id)sender {
if (self.deviceTable) {
[self.deviceTable removefromSuperview];
self.deviceTable = nil;
}
self.deviceTable = [[UITableView alloc] init];
// and so on
`
Also you might put another method in peripheralManager delegate ... something like
-(void)didFinishScanning and inside redraw your table view.
I hope I understood the question well, and helped you in any way