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John Difool
John Difool

Reputation: 5702

Calendar 'date(byAdding:to:options:)' is unavailable after Swift 4 update

How do I use the new way? What is this wrappingComponentsif the previous call was passing Options(0)?

'date(byAdding:to:options:)' is unavailable: use date(byAdding:to:wrappingComponents:) instead

wrappingComponents: If true, the component should be incremented and wrap around to zero/one on overflow, and should not cause higher components to be incremented. The default value is false.

Upvotes: 0

Views: 807

Answers (1)

rmaddy
rmaddy

Reputation: 318794

The documentation for NSCalendar date(byAdding:to:options:) states the following for the options parameter:

If you specify no options, overflow in a unit carries into the higher units (as in typical addition)

The documentation for Calendar date(byAdding:to:wrappingComponents:) states the following for the wrappingComponents parameter:

If true, the component should be incremented and wrap around to zero/one on overflow, and should not cause higher components to be incremented.

This implies that false will cause higher components to be incremented.

So it would seem that for the Calendar date(byAdding:to:wrappingComponents:) you would want to pass false to be the same as the old function with no options.

Upvotes: 2

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