Type Method

predicateForActivitySummaryWithDateComponents:

Returns a predicate that matches the activity summary for the specified day.

Declaration

+ (NSPredicate *)predicateForActivitySummaryWithDateComponents:(NSDateComponents *)dateComponents;

Parameters

dateComponents

Date components that uniquely identify the day as perceived by the user. This day may be longer or shorter than 24 hours (for example, if the user traveled across time zones).

The date components must have a valid calendar property.

Return Value

A predicate for matching a single activity summary.

Discussion

Use this convenience method to create a predicate that matches the activity summary for the specified day. The following sample uses both the convenience method and a predicate format string to create equivalent predicates.

NSPredicate *forDay =
[HKQuery predicateForActivitySummaryWithDateComponents: day];
 
NSPredicate *explicitforDay =
[NSPredicate predicateWithFormat:@"%K == %@",
 HKPredicateKeyPathDateComponents, day];

See Also

Creating Activity Summary Predicates

+ predicateForActivitySummariesBetweenStartDateComponents:endDateComponents:

Returns a predicate for matching all the activity summaries that fall between the days identified by the start and end date components.