How to load entirely different ViewController in a Master-Detail app? - ios

Question

I have a Master-Detail app and I want to load a new view on the click of rows in Master. If I select row-1, the view is different, and on selection of a different row, new view is presented in Detail portion. How can I achieve this thing?
I am doing something like this. The issue is - If I select any of these 2 rows for the first time, the view actually changes. But again when I click on the other row, it does not change.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexPath.row==0){
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
TwitterTweetViewController *detailView=(TwitterTweetViewController *)[storyboard instantiateViewControllerWithIdentifier:#"TwitterDetailView"];
self.splitViewController.mainViewController = detailView;
[self.splitViewController.mainViewController viewDidLoad];
[self.splitViewController viewDidLoad];
}
if(indexPath.row == 1)
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
TwitterDetailViewController *detailView=(TwitterDetailViewController *)[storyboard instantiateViewControllerWithIdentifier:#"TwitterDetailView"];
self.splitViewController.mainViewController = detailView;
[self.splitViewController.mainViewController viewDidLoad];
[self.splitViewController viewDidLoad];
}
}
What should I do in order to change the view on selecting these rows?

Answer 1

There is a great method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
Use it. It is called right after the click has been made on a cell. You can put some check in there. Short example:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 0) {
SomeViewController *svc = [[SomeViewController alloc]initWithNibName:#"SomeViewController" bundle:nil];
[self.navigationController pushViewController:svc];
} else if (indexPath.row > 0 && indexPath.row < 5) {
SomeOtherViewController *sovc = [[SomeOtherViewController alloc]initWithNibName:#"SomeOtherViewController" bundle:nil];
[self.navigationController pushViewController:sovc];
} else {
AnotherViewController *avc = [[AnotherViewController alloc]initWithNibName:#"AnotherViewController" bundle:nil];
[self.navigationController pushViewController:avc];
}
//some other code if needed
}
Hope it helps

Answer 2

You can create an enum of your view controllers as :-
enum MyViewControllers
{
viewcontroller1
viewcontroller2
viewcontroller3
}
The constatns in enum would correspond to your viewcontrollers for each indexPAth.
and then in the delegate method of UITAbleVIew didSelectRowAtIndexPath: , use switch case :-
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
switch(indexPath.row)
{
case 1:
Load view1
break;
case 2:
Load view2
break;
case 3:
Load view3
break; .
.
so on.
}
}
Or in case of different NavigationControllers (as in iPad )you will have to pass data using delegates and protocol.Define the protocol in rootViewController and then set its delegate in the detail(Where you want to push the viewcontroller)
somethinglike :-
#protocol SendSelectedINdexDelegate
{
#required
-(void)sendTheIndex:(NSNumber)number.
#end
in interface
id <SendSelectedINdexDelegate> delegateSend
set its property:-
#property (nonatomic) id delegateSend;
in .m
#synthesize delegateSend
and in didSelectRowAtIndexPath:-
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
[self delegate]sendTheIndex:indexPath.row];
}
At the receiving controller
conform to protocol
and set
rootview.delegateSend=self;
and implement the method of protocol;
-(void)sendTheIndex:(NSNumber)number
{
//nsnumber is your index perform operation based on this.
}

Answer 3

Take care that if you are using ARC,it forbids synth of a property with unspecified ownership attribute( in .m #synthesize delegateSend).