我需要将NSTimeInterval类型的变量(我知道是Double)转换为Integer.我已经尝试过这里的解决方案：
How to convert NSTimeInterval to int?,没有成功.任何人都可以在Swift中提供有关如何执行此操作的任何建议吗？
以下是我的功能：
以下是我的功能：
func getHKQuantityData(sampleType: HKSampleType,timeUnit: NSCalendarUnit,startDate: NSDate,endDate: NSDate,completion: (Void -> Void)) -> [(NSDate,Double)] {
var startTime = 0
var endTime = 0
var repeat: NSTimeInterval
var returnValue: [(NSDate,Double)] = []
var queryType: String = ""
var predicate: NSPredicate!
let timeInterval = endDate.timeIntervalSinceDate(startDate)
switch sampleType {
case HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount):
queryType = "step"
case HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierHeight):
queryType = "height"
case HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBodyMass):
queryType = "weight"
case HKSampleType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBodyMassIndex):
queryType = "bmi"
default:
println("No recognized type")
}
switch timeInterval {
// 1. Case for seconds
case 0...59:
predicate = HKQuery.predicateForSamplesWithStartDate(NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitSecond,value: startTime,toDate: NSDate(),options: nil),endDate: NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitSecond,options: .None)
repeat = timeInterval
// 2. Case for minutes
case 61...3599:
predicate = HKQuery.predicateForSamplesWithStartDate(NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMinute,endDate: NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMinute,options: .None)
repeat = round(timeInterval / 60)
// 3. Case for Hours
case 3600...86399:
predicate = HKQuery.predicateForSamplesWithStartDate(NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitHour,endDate: NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitHour,options: .None)
repeat = round(timeInterval / 3600)
// 4. Default for Days
default:
predicate = HKQuery.predicateForSamplesWithStartDate(NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitDay,endDate: NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitDay,options: .None)
repeat = round(timeInterval / 86400)
}
/*
for x in 1...repeat {
}
*/
// Returns one data point for each timeUnit between startDate and endDate
// array of tuples - (date,double)
return returnValue
}
