Question about best practice when building multiple children

[foulkesjohn]

I have a component which will be used in a collectionview. This component in turn can be built up with many other components so I have a CKStackLayoutComponent which I want to insert multiple children. The number of children will be dynamic (in reality no more than 4), what is the best way to build these up and pass to the children of a CKStackLayoutComponent?

[natansh]

The best way to add a dynamic number of children is to build up a std::vector of CKStackLayoutComponentChild using methods like push_back.

std::vector<CKStackLayoutComponentChild> children = {};
for (ModelType *model in models) {
  // Create component from model, let's say the name of the component you create is childComponent.
  children.push_back(childComponent);
}

And then you can pass in the children directly to CKStackLayoutComponent.

If you already know the exact number beforehand, I would suggest you just create the children inline with CKStackLayoutComponent.

[ocrickard]

If your children are truly dynamic then you can do push_back, but as Natansh hints at: it's rare that's the case.

Check out http://componentkit.org/docs/avoid-push-back.html

[adamjernst]

One last tip: FB::map is a great helper. See ComponentUtilities.h.

[foulkesjohn]

Thanks, this is exactly what I was after.