swift - 如何计算从选定时间(小时)到给定持续时间的时间(小时)

Question

例如，如果我选择了时间:下午 3 点和小时数:5 小时，则得到 (8pm) 作为答案“

Answer 1

let calendar = Calendar.current
let date = calendar.date(byAdding: .hour, value: 5, to: Date())
or
let date = calendar.date(byAdding: . minute, value: 330, to: Date())

Now you can get hour

let comp = calendar.dateComponents([.hour, .minute], from: date)
let hour = comp.hour
let minute = comp.minute

print(hour)// This is your answer.