如何計算從選定時間（小時）到給定持續時間的時間（小時）

Question

例如，如果我選擇了時間：下午3點和小時數：5小時，則獲取（晚上8點）作爲答案「

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()) 

現在你可以

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

print(hour)// This is your answer.