Swift: вызов init из другого init

Question

У меня есть объект с двумя методами init. Один из них принимает NSDictionary, а другой принимает целую тонну переменных String. Я хочу вызвать NSDictionary init и оттуда преобразовать свой словарь в строки и вызвать другой init с моими строками. Вот мой код:

init(data: NSDictionary) { 
    self = Event(data["event_id"] as! String, eventName: data["event_name"] as! String, eventDescription: data["description"] as! String, eventCategories: data["categories"] as! [String], eventSecurity: data["event_security"] as! String, authorUserID: data["author_user_id"] as! String, timestampCreated: data["timestamp_created"] as! String, timestampUpdated: data["timestamp_updated"] as! String, startDateTime: data["start_date_time"] as! String, endDateTime: data["end_date_time"] as! String, location: Location(streetAddress: data["location_street_address"] as! String, city: data["location_city"] as! String, state: data["location_state"] as! String, zipCode: data["location_zipcode"] as! String, countryCode: data["location_country_code"] as! String), reoccurDateStart: data["reoccur_date_start"] as! String, reoccurDateEnd: data["reoccur_date_end"] as! String, reoccurDaysOfWeek: data["reoccur_days_of_week"] as! String, eventType: data["categories"] as! String) 
} 
init(eventID: String, eventName: String, eventDescription: String, eventCategories: [String], eventSecurity: String, authorUserID: String, timestampCreated: String, timestampUpdated: String, startDateTime: String, endDateTime: String, location: Location, reoccurDateStart: String, reoccurDateEnd: String, reoccurDaysOfWeek: String, eventType: String){ 
    self.eventID = eventID 
    self.eventName = eventName 
    self.eventDescription = eventDescription 
    self.eventCategories = eventCategories 
    self.eventSecurity = eventSecurity 
    self.authorUserID = authorUserID 
    self.timestampCreated = timestampCreated 
    self.timestampUpdated = timestampUpdated 
    self.startDateTime = startDateTime 
    self.endDateTime = endDateTime 
    self.location = location 
    self.reoccurDateStart = reoccurDateStart 
    self.reoccurDateEnd = reoccurDateEnd 
    self.reoccurDaysOfWeek = reoccurDaysOfWeek 
    self.eventType = eventType 
    setUpCustomVariables() 
} 

func setUpCustomVariables() { 
    let form = NSDateFormatter() 
    form.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" 
    form.timeZone = NSTimeZone(forSecondsFromGMT: 0) 
    startDate = form.dateFromString(startDateTime)! 
    endDate = form.dateFromString(endDateTime)! 
    startTime = 800 
    endTime = 815 
    form.dateStyle = NSDateFormatterStyle.NoStyle 
    form.timeStyle = NSDateFormatterStyle.ShortStyle 
    niceStartTime = form.stringFromDate(startDate!) 
    form.dateFormat = "yyyyMMddHHmm" 
    let startDateIntString: String = form.stringFromDate(startDate!) 
    startDateInt = Int(startDateIntString) 
    form.dateFormat = "yyyyMMdd" 
    startDateIntJustDate = Int(form.stringFromDate(startDate!)) 
    form.timeStyle = NSDateFormatterStyle.NoStyle 
    form.dateStyle = NSDateFormatterStyle.LongStyle 
    niceStartDate = form.stringFromDate(startDate!) 


    typeOfRepeat = "One-Time Event" 

    if eventType == "Phone" { 
     eventTypeNumber = 1 
    } else if eventType == "Video" { 
     eventTypeNumber = 2 
    } else if eventType == "Location" { 
     eventTypeNumber = 3 
    } else { 
     eventTypeNumber = 4 
    } 
} 

Однако, я не могу построить мой проект, потому что «Невозможно присвоить„самость“в методе»

Я попытался также вызывающая init(...) вместо Event(...) но я получаю другой компилятор ошибка.

Как это сделать?

ОБНОВЛЕНИЕ Я использовал функцию удобства, но теперь у меня есть новая проблема. Вот мой новый код:

convenience init(data: NSDictionary) { 
    self.init(data["event_id"], eventName: data["event_name"], eventDescription: data["description"], eventCategories:data["categories"], eventSecurity:data["event_security"], authorUserID:data["author_user_id"], timestampCreated:data["timestamp_created"], timestampUpdated:data["timestamp_updated"], startDateTime:data["start_date_time"], endDateTime:data["end_date_time"], location: Location(streetAddress:data["location_street_address"], city:data["location_city"], state:data["location_state"], zipCode:data["location_zipcode"], countryCode:data["location_country_code"]), reoccurDateStart:data["reoccur_date_start"], reoccurDateEnd:data["reoccur_date_end"], reoccurDaysOfWeek:data["reoccur_days_of_week"], eventType:data["categories"]) 
} 

и ошибка компилятора () is not convertible to StringLiteralConvertible

UPDATE 2 Я установил ее. Вот окончательный код на тот случай, если он кому-то понадобится:

convenience init(data: NSDictionary) { 
    self.init(eventID: String(data["event_id"]), eventName: String(data["event_name"]), eventDescription: String(data["description"]), eventCategories: [String(data["categories"])], eventSecurity: String(data["event_security"]), authorUserID: String(data["author_user_id"]), timestampCreated: String(data["timestamp_created"]), timestampUpdated: String(data["timestamp_updated"]), startDateTime: String(data["start_date_time"]), endDateTime: String(data["end_date_time"]), location: Location(streetAddress: String(data["location_street_address"]), city: String(data["location_city"]), state: String(data["location_state"]), zipCode: String(data["location_zipcode"]), countryCode: String(data["location_country_code"])), reoccurDateStart: String(data["reoccur_date_start"]), reoccurDateEnd: String(data["reoccur_date_end"]), reoccurDaysOfWeek: String(data["reoccur_days_of_week"]), eventType: String(data["categories"])) 
} 

Answer 1

Используйте удобство init!

convenience init(data: NSDictionary) { 
    self.init(eventID: String(data["event_id"]), eventName: String(data["event_name"]), eventDescription: String(data["description"]), eventCategories: [String(data["categories"])], eventSecurity: String(data["event_security"]), authorUserID: String(data["author_user_id"]), timestampCreated: String(data["timestamp_created"]), timestampUpdated: String(data["timestamp_updated"]), startDateTime: String(data["start_date_time"]), endDateTime: String(data["end_date_time"]), location: Location(streetAddress: String(data["location_street_address"]), city: String(data["location_city"]), state: String(data["location_state"]), zipCode: String(data["location_zipcode"]), countryCode: String(data["location_country_code"])), reoccurDateStart: String(data["reoccur_date_start"]), reoccurDateEnd: String(data["reoccur_date_end"]), reoccurDaysOfWeek: String(data["reoccur_days_of_week"]), eventType: String(data["categories"])) 
}