[英]Get the next weekday of Date()
My app is broken down like so,我的应用程序像这样被分解了,
For example, if the user selects 01/11/2020 as the start and 01/03/2021 as the end, then a bill date is the 14th, I am trying to create a billStartDate for 14/11/2020 and billEndDate the 14/02/2021.例如,如果用户选择 01/11/2020 作为开始,选择 01/03/2021 作为结束,那么账单日期是 14 日,我正在尝试为 14/11/2020 创建 billStartDate 和 billEndDate 14 /02/2021。
Something like the following,像下面这样的东西,
extension Date {
func setBillStartDate(start: Date, billdate: Payment.BillDate) -> Date {
let day = start.dayNumberOfWeek
var startDate = Date()
switch billdate {
case .start:
if day > 1 {
// Create a start date on the next 1st
} else if day == 1 {
// is the first then on that day
startDate = start
}
case .middle:
if day > 1 {
// Create a date on the next 14th
} else if day == 14 {
// if is the 14th then on that day
startDate = start
}
case .end:
if day > 1 {
// Create a date on the next 28th
} else if day == 28 {
// if is the 14th then on that day
startDate = start
}
}
return startDate
}
func setBillEndDate(date: Date, billdate: Payment.BillDate) -> Date {
let day = date.dayNumberOfWeek
var endDate = Date()
switch billdate {
case .start:
if day > 1 {
// Create a start date on the next 1st
} else if day == 1 {
// is the first then on that day
endDate = date
}
case .middle:
if day > 1 {
// Create a date on the next 14th
} else if day == 14 {
// if is the 14th then on that day
endDate = date
}
case .end:
if day > 1 {
// Create a date on the next 28th
} else if day == 28 {
// if is the 14th then on that day
endDate = date
}
}
return endDate
}
func dayNumberOfWeek() -> Int? {
return Calendar.current.dateComponents([.weekday], from: self).weekday
}
}
The above gives me the following error以上给了我以下错误
Type '() -> Int?'
键入“()-> Int?” cannot conform to 'BinaryInteger';
不能符合“BinaryInteger”; only struct/enum/class types can conform to protocols
只有结构/枚举/类类型可以符合协议
Change改变
let day = start.dayNumberOfWeek
To至
let day = start.dayNumberOfWeek()
Or even better甚至更好
if let day = start.dayNumberOfWeek() {
(There will still be compile errors, but that should be enough to get you moving again.) (仍然会有编译错误,但这应该足以让你再次移动。)
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