改变UserDefaultLanguage Swift问题

Question

我是编程新手，我已经发现如何仅在Objective C中更改CLLocation反向地理位置:

 NSMutableArray *userDefaultLanguages = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleLanguages"];
[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"en", nil] forKey:@"AppleLanguages"];
[self.geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray* placemarks, NSError* error){
   MKPlacemark *placemarker = [placemarks objectAtIndex:0];
   NSLog(@"%@",placemarker.locality);
   }];
[[NSUserDefaults standardUserDefaults] setObject:userDefaultLanguages forKey:@"AppleLanguages"];

我在Swift中翻译它有很大的困难，这是我设法做到的:

        let userDefLang = UserDefaults.standard.array(forKey: "AppleLanguages")
var placeMark: CLPlacemark!
        placeMark = placemarks?[0]
        if let city = placeMark.addressDictionary!["State"] as? String
        {
            self.city = city as String
        } else
        {
            self.city = "CONNECTION"
        }
        if let country = placeMark.addressDictionary!["Country"] as? String
        {
            self.country = country as String
        } else
        {
            self.country = "FAILED"
        }
        self.currentCity.name = ("(self.city), (self.country)" as String)

但是我不知道如何正确地设置语言，然后改变它，请帮助我…我不会做的事情是:

[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"en", nil] forKey:@"AppleLanguages"];

和

[[NSUserDefaults standardUserDefaults] setObject:userDefaultLanguages forKey:@"AppleLanguages"];

我已经做了更改，就像你告诉(我希望我明白如何)这是代码:

   func convertLocationToCity()
{
    if let defaultLanguage = UserDefaults.standard.array(forKey: "AppleLanguages") as? [String]
    {
        let newLang = ["en"]
        UserDefaults.standard.set(newLang, forKey: "AppleLanguages")
        let geoCoder = CLGeocoder()
        let userLocation = CLLocation(latitude: self.lat, longitude: self.long)
        geoCoder.reverseGeocodeLocation(userLocation, completionHandler:
            {
                (placemarks, error) -> Void in
                var placeMark: CLPlacemark!
                placeMark = placemarks?[0]
                var cityRef = ""
                var countryRef = ""
                if let city = placeMark.addressDictionary!["State"] as? String
                {
                    cityRef = city as String
                } else
                {
                    cityRef = ""
                }
                if let country = placeMark.addressDictionary!["Country"] as? String
                {
                    countryRef = country as String
                } else
                {
                    countryRef = ""
                }
                self.currentCity = ("(cityRef), (countryRef)" as String)
                if (self.didLoadCity == "" || self.didLoadCity == self.currentCity)
                {
                    self.didLoadCity = ("(cityRef), (countryRef)" as String)
                }
                print("(self.currentCity)")
                self.cityNameLabel.text = self.currentCity
        })

        //After that set again defaultLanguage.
        UserDefaults.standard.set(defaultLanguage, forKey: "AppleLanguages")
    }
}

但仍然没有更改，它显示了手机默认语言的响应。

Answer 1

您可以像这样在UserDefaults对象上使用array(forKey:)和set(_:forKey:)。

if let defaultLanguage = UserDefaults.standard.array(forKey: "AppleLanguages") as? [String] {
        let newLang = ["en"]
        UserDefaults.standard.set(newLang, forKey: "AppleLanguages")
        //Perform your Task here
        //After that set again defaultLanguage.
        UserDefaults.standard.set(defaultLanguage, forKey: "AppleLanguages") 
    }