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，则获取（晚上8点）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()) 

现在你可以

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

print(hour)// This is your answer.