了解来自HKSourceQuery或一般来源的结果

我只是做了一个HKSourceQuery并得到了一些结果。 当我做了一个println的结果，我得到这个： <HKSource:0x156c1520 "Health" (com.apple.Health)>//description of the object

如何使用这个来做一个使用HKQuery.predicateForObjectsFromSource(/* source goes here */)的谓词HKQuery.predicateForObjectsFromSource(/* source goes here */)

Answer 1

这里是Obj-c中的示例代码，

 NSSortDescriptor *timeSortDesriptor = [[NSSortDescriptor alloc] initWithKey:HKSampleSortIdentifierEndDate ascending:NO]; HKQuantityType *quantityType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierActiveEnergyBurned]; HKSourceQuery *sourceQuery = [[HKSourceQuery alloc] initWithSampleType:quantityType samplePredicate:nil completionHandler:^(HKSourceQuery *query, NSSet *sources, NSError *error) { //Here, sources is a set of all the HKSource objects available for "quantityTypeForIdentifier:HKQuantityTypeIdentifierActiveEnergyBurned" HKSource *targetedSource = [[sources allObjects] firstObject];//Assume this as your targeted source if(targetedSource) { NSPredicate *sourcePredicate = [HKQuery predicateForObjectsFromSource:targetedSource]; HKSampleQuery *query = [[HKSampleQuery alloc] initWithSampleType:quantityType predicate:sourcePredicate limit:HKObjectQueryNoLimit sortDescriptors:[NSArray arrayWithObject:timeSortDesriptor] resultsHandler:^(HKSampleQuery *query, NSArray *results, NSError *error) { //results array contains the HKSampleSample objects, whose source is "targetedSource". }]; [self.healthStore executeQuery:query]; } }]; [self.healthStore executeQuery:sourceQuery]; 

更新1：

1. 使用[HKSource alloc] init]手动构buildHKSource对象是不可能的。 在HealthKit框架中，Apple限制了大多数HK类使用init的对象创build。
2. 我相信你可以从使用HKSource属性（如name和bundleIdentifier设置的sourcesfind你的HKSource对象。

这里是示例代码，

  NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF.source.bundleIdentifier = 'com.XXXX.XXXXX'"]; NSArray *tempResults = [[sources allObjects] filteredArrayUsingPredicate:predicate]; HKSource *targetedSource = [tempResults firstObject];