Call DataSource method in awakeFromNib - ios

Question

So the question is like this:
I subclass 2 classes, which is UIView(name: Menu) and UIViewController(name: MainController). In Menu, i used xib file to create it layout. In MainController, i added Menu as subview like this and comform to protocol in Menu.
SliderMenu *sliderMenu = [[[NSBundle mainBundle] loadNibNamed:#"SliderMenu" owner:self options:nil] objectAtIndex:0];
sliderMenu.datasource = self;
sliderMenu.delegate = self;
[self.view addSubview:sliderMenu];
The layout works perfectly, there is no problem with it.
The problem is with DataSource. i call a datasource method in awakeFromNib
- (void)awakeFromNib {
// Alloc data
self.data = [[NSArray alloc] initWithArray:[self.datasource arrayOfData]];
}
and that never even get called. After trying and trying i found out that, sliderMenu.datasource = self;is run after awakeFromNib. Thats is why the datasource method in MainController is never get called.
Question:
How can i solve this problem?

Answer 1

If you put a breakpoint in -awakeFromNib method, you'll see that this method executes as it should.
The thing is, that this method called before datasource assignment, and at this moment your self.datasource is nil.
I suggest you to override the setter of the datasource property and initialize your data there, e.g.
- (void)setDatasource:(id<YourProtocol>)datasource
{
_datasource = datasource;
self.data = [[NSArray alloc] initWithArray:[datasource arrayOfData]];
}
OR
make a public method, say, prepare and do all your initialization there,
- (void)prepare
{
self.data = [[NSArray alloc] initWithArray:[self.datasource arrayOfData]];
}
and call this method after datasource assignment:
SliderMenu *sliderMenu = [[[NSBundle mainBundle] loadNibNamed:#"SliderMenu" owner:self options:nil] objectAtIndex:0];
sliderMenu.datasource = self;
sliderMenu.delegate = self;
[sliderMenu prepare];
[self.view addSubview:sliderMenu];