Question

发布之前，我确实搜索了此答案，但没有找到我需要的答案，所以想问一下您是否能帮助我。

我有一个iOS Swift应用程序，它扫描我的日历事件中的QR码，然后将其显示为警报弹出窗口。我需要扫描QR Code（日历事件），并且在扫描提示是否将Event添加到日历中时，还需要将扫描限制为事件QR Code。

有效的代码来自https://medium.com/@gayatri.hedau/qr-code-scanner-with-avcapturesession-ios-swift-5007ee498b49，但是您可以在此处确认已查看扫描的信息。

带有事件信息的QR码是在https://qrcode.tec-it.com/en/Calendar上创建的

我不太了解，但是我认为应该调整下面的代码部分，因为该部分显示了警报QR码。

   func receivedCode(qrcode: String) {
    print(qrcode)
    let alertController = UIAlertController(title: "Do you want to add event into your calendar?", message: qrcode, preferredStyle: .alert)
    let action1 = UIAlertAction(title: "Ok", style: .default) { (action:UIAlertAction) in
        self.dismiss(animated: true)
    }
    alertController.addAction(action1)
    self.present(alertController, animated: true, completion: nil)
}

在扫描QR码时，我得到了

BEGIN：VEVENT 摘要：7月学生会描述：参加学生会议地点：21号会议室 DTSTART：20190710T140000Z END：VEVENT

此外，当使用来自AppStore的类似QR Code应用扫描仪进行扫描时，它也表明是日历事件。

Answer 1

我找到了通过处理QR码返回的字符串值的解决方案：

var aStr = codeString.replacingOccurrences(of: "BEGIN:VEVENT", with: "")
aStr = aStr.replacingOccurrences(of: "\n", with: "")
aStr = aStr.replacingOccurrences(of: "SUMMARY:", with: "")
aStr = aStr.replacingOccurrences(of: "LOCATION:", with: "_")
aStr = aStr.replacingOccurrences(of: "DTSTART:", with: "_")
aStr = aStr.replacingOccurrences(of: "DTEND:", with: "_")
aStr = aStr.replacingOccurrences(of: "END:VEVENT", with: "")
print("\nEVENT STRING: \(aStr)\n")

// Make an array of aStr items
let evArr = aStr.components(separatedBy: "_")
let startDateStr = "\(evArr[2])"
let endDateStr = "\(evArr[3])"

// Get dates from Strings
let df = DateFormatter()
df.locale = Locale(identifier: "en_US_POSIX")
df.timeZone = TimeZone.autoupdatingCurrent
df.dateFormat = "yyyyMMdd'T'HHmmss"
let startDate = df.date(from: startDateStr)
let endDate = df.date(from: endDateStr)

// Store Event in Calendar
let eventStore = EKEventStore()
eventStore.requestAccess(to: EKEntityType.event) { (granted, error) in
    if granted && error == nil {
        print("ACCESS GRANTED \(granted)")
        print("ERROR: \(String(describing: error))")

        let event = EKEvent(eventStore: eventStore)
        event.title = "\(evArr[0])"
        event.startDate = startDate!
        event.endDate = endDate!
        event.notes = "EVENT: \(evArr[0])\nLOCATION: \(evArr[1])"
        // Save Event...
        event.calendar = eventStore.defaultCalendarForNewEvents
        do { try eventStore.save(event, span: .thisEvent)
        } catch let error as NSError { print("Failed to save Event: \(error)") }

        print("Event saved in your Calendar app")
// error
} else { print("Failed to save Event: \(error!.localizedDescription)") }

请注意，此代码处理在https://www.qrcode-monkey.com/#event上创建的类型为 vEvent 的QR码。
但是，如果您在https://www.qrstuff.com上创建事件，则该事件将是 vCalendar 事件类型，因此您需要以下代码将其保存到iOS日历应用中：

var aStr = codeString.replacingOccurrences(of: "BEGIN:VCALENDAR", with: "")
aStr = aStr.replacingOccurrences(of: "VERSION:2.0", with: "")
aStr = aStr.replacingOccurrences(of: "BEGIN:VEVENT", with: "")
aStr = aStr.replacingOccurrences(of: "\n", with: "")
aStr = aStr.replacingOccurrences(of: "\r", with: "")
aStr = aStr.replacingOccurrences(of: "SUMMARY;CHARSET=utf-8:", with: "")
aStr = aStr.replacingOccurrences(of: "LOCATION;CHARSET=utf-8:", with: "_")
aStr = aStr.replacingOccurrences(of: "DTSTART:", with: "_")
aStr = aStr.replacingOccurrences(of: "DTEND:", with: "_")
aStr = aStr.replacingOccurrences(of: "END:VEVENT", with: "")
aStr = aStr.replacingOccurrences(of: "END:VCALENDAR", with: "")

// Make an array of aStr items
let evArr = aStr.components(separatedBy: "_")
let startDateStr = "\(evArr[2])"
let endDateStr = "\(evArr[3])"

// Get dates from Strings
let df = DateFormatter()
df.locale = Locale(identifier: "en_US_POSIX")
df.timeZone = TimeZone.autoupdatingCurrent
df.dateFormat = "yyyyMMdd'T'HHmmssZ"
let startDate = df.date(from: startDateStr)
let endDate = df.date(from: endDateStr)

// Store Event in Calendar
let eventStore = EKEventStore()
eventStore.requestAccess(to: EKEntityType.event) { (granted, error) in
    if granted && error == nil {
         print("ACCESS GRANTED \(granted)")
         print("ERROR: \(String(describing: error))")

         let event = EKEvent(eventStore: eventStore)
         event.title = "\(evArr[0])"
         event.startDate = startDate!
         event.endDate = endDate!
         event.notes = "EVENT: \(evArr[0])\nLOCATION: \(evArr[1])"

         // Save Event...
         event.calendar = eventStore.defaultCalendarForNewEvents
         do { try eventStore.save(event, span: .thisEvent)
         } catch let error as NSError { print("Failed to save Event: \(error)") }
         print("This Event has been saved in your Calendar app")

// error
} else { print("Failed to save Event: \(error!.localizedDescription)") }

在iOS上通过QR扫描仪扫描后如何在日历中添加事件

1 个答案: