Fit width in iOS 8 Today Extensions

Question

When I make any iOS 8 Today Extension, there is an empty space on the left of approximately 48px, even if in Interface Builder I place a label on the left side at x=0.

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I have seen that some apps, however, use a full-width widget.

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How can I achieve something similar?

Thanks!

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UPDATE: SOLVED

I put here the sample code because I guess it will be useful to someone. As suggested by @matteo-lallone, the correct way to do this is:

-(UIEdgeInsets)widgetMarginInsetsForProposedMarginInsets:(UIEdgeInsets)defaultMa‌​rginInsets{
return UIEdgeInsetsZero;
}

Answer 1

Straight from the docs:

A Today widget created using the Xcode Today template includes Auto Layout constraints for standard margin insets. To get the inset values for your calculations, implement the widgetMarginInsetsForProposedMarginInsets: method.

Source: App Extension Programming Guide - Today

Answer 2

I can supplement the swift version

func widgetMarginInsetsForProposedMarginInsets(defaultMarginInsets: UIEdgeInsets) -> UIEdgeInsets {
    return UIEdgeInsetsZero
}

for oc

-(UIEdgeInsets)widgetMarginInsetsForProposedMarginInsets:(UIEdgeInsets)defaultMarginInsets {
    return UIEdgeInsetsZero
}

hope it can help someone.