Repostioning a UITableView - ios

Question

I have a view controller with
sub view(half the main view size)
table view(half the main view size)
navigation bar button
On click of button I want the sub view to hide and table view to show with full main view size....It is working fine with below code, but just not for the first time.
For first time when I click bar button it hides the sub view and resizes the table view but does not show the result on screen(works well for rest all time).
If incase I scroll the tableview before clicking navigation bar for the first time it works fines...I think it has something to do with table view loading which I cant make out
Code
if(isMapVisible==YES) {
[mapView setHidden:YES];
[tblView setFrame:CGRectMake(self.view.frame.origin.x,
self.view.frame.origin.y+self.navigationController.navigationBar.frame.size.height+[UIApplication sharedApplication].statusBarFrame.size.height,
self.view.frame.size.width,
self.view.frame.size.height-self.navigationController.navigationBar.frame.size.height-[UIApplication sharedApplication].statusBarFrame.size.height-self.navigationController.tabBarController.tabBar.frame.size.height)];
isMapVisible=NO;
} else {
[mapView setHidden:NO];
[tblView setFrame:CGRectMake(mapView.frame.origin.x,
mapView.frame.origin.y+mapView.frame.size.height+1,
mapView.frame.size.width,
mapView.frame.size.height)];
isMapVisible=YES;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
activityCell *cell = (activityCell*)[tableView dequeueReusableCellWithIdentifier:#"activityCell" forIndexPath:indexPath];
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 10;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath: (NSIndexPath *)indexPath {
return 100;
}

Answer 1

Call your method like this
[self performSelector:#selector(methodToChangeTableViewFrame) withObject:nil afterDelay:0.1f];
-(void)methodToChangeTableViewFrame {
// Here your code
if(isMapVisible==YES) {
[mapView setHidden:YES];
[tblView setFrame:CGRectMake(self.view.frame.origin.x,
self.view.frame.origin.y+self.navigationController.navigationBar.frame.size.height+[UIApplication sharedApplication].statusBarFrame.size.height,
self.view.frame.size.width,
self.view.frame.size.height-self.navigationController.navigationBar.frame.size.height-[UIApplication sharedApplication].statusBarFrame.size.height-self.navigationController.tabBarController.tabBar.frame.size.height)];
isMapVisible=NO;
} else {
[mapView setHidden:NO];
[tblView setFrame:CGRectMake(mapView.frame.origin.x,
mapView.frame.origin.y+mapView.frame.size.height+1,
mapView.frame.size.width,
mapView.frame.size.height)];
isMapVisible=YES;
}
}