运行HKStatisticsCollectionQuery示例代码时获得“模糊使用'组件'错误”

Question

let calendar = NSCalendar.current    
let interval = NSDateComponents()
interval.day = 7

// Set the anchor date to Monday at 3:00 a.m.
let anchorComponents = calendar.components([.Day, .Month, .Year, .Weekday], fromDate: NSDate())


let offset = (7 + anchorComponents.weekday - 2) % 7
anchorComponents.day -= offset
anchorComponents.hour = 3

我在运行代码时在锚定组件声明中误用了'components'错误

Answer 1

您应该使用Date，DateComponents和Calendar而不是NSDate，NSDateComponents和NSCalendar。然后，旧语法需要更新为最新的Swift版本。另外，在更改值时，还需要将常量（let）interval和anchorComponents更改为变量（var）。下面是固定的代码段，

let calendar = Calendar.current
var interval = DateComponents()
interval.day = 7

// Set the anchor date to Monday at 3:00 a.m.
var anchorComponents = calendar.dateComponents([.day, .month, .year, .weekday], from: Date())


let offset = (7 + (anchorComponents.weekday ?? 0) - 2) % 7
anchorComponents.day = (anchorComponents.day ?? 0) - offset
anchorComponents.hour = 3