如何在 swiftui 中设置给定字符串类型日期的日期倒计时

这种方法可能是您问题的解决方案.请告诉我它是不是能用.如果我理解你的问题，那么这就是解决方案.

struct DateTimerView:View{
    
        @State private var endDateText = "25-12-2027"
            @State private var remainingTime = "Enter an end date"
            @State private var timer: Timer?
            
            var body: some View {
                VStack {
                    TextField("Enter an end date", text: $endDateText, onCommit: startTimer)
                        .padding()
                    
                    Text(remainingTime)
                        .padding()
                }
                .onDisappear(perform: stopTimer)
            }
            
            func startTimer() {
                let formatter = DateFormatter()
                formatter.dateFormat = "dd-MM-yyyy"
                
                if let endDate = formatter.date(from: endDateText) {
                    let timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { timer in
                        let currentDate = Date()
                        
                        let calendar = Calendar.current
                        let difference = calendar.dateComponents([.day, .hour, .minute, .second], from: currentDate, to: endDate)
                        
                        if difference.day! > 0 {
                            remainingTime = "\(difference.day!) d  \(difference.hour!) h \(difference.minute!) m \(difference.second!) s"
                        } else if difference.hour! > 0 {
                            remainingTime = "\(difference.hour!) h  \(difference.minute!) m \(difference.second!) s"
                        } else if difference.minute! > 0 {
                            remainingTime = "\(difference.minute!) m \(difference.second!) s"
                        } else {
                            remainingTime = "\(difference.second!) s"
                        }
                        
                        if currentDate >= endDate {
                            stopTimer()
                        }
                    }
                    
                    self.timer = timer
                } else {
                    remainingTime = "Invalid date format"
                }
            }
            
            func stopTimer() {
                timer?.invalidate()
                timer = nil
            }
    }