Question

我有一个Mappable类型的模型，我在firstViewController中从api传递数据。现在我想访问secondViewController中的模型类数据。那么我如何在secondViewController中使用数据。这是我的代码：

import ObjectMapper

class UserProfileResponse: Mappable {

var data:UserProfileData?
var success: Bool?
var error: String?

required init?(map: Map){

}

func mapping(map: Map) {
    data <- map["data"]
    success <- map["success"]
    error <- map["error"]
}
}

class UserProfileData: Mappable {

var address: String?
var joinDate: String?
var phone: String?
var policyName: String?
var imageUrl: String?
var name: String?
var policyNo: String?
var title: String?

required init(map: Map){

}

func mapping(map: Map) {
    address <- map["address"]
    joinDate <- map["joinDate"]
    phone <- map["phone"]
    policyName <- map["policyName"]
    imageUrl <- map["imageUrl"]
    name <- map["name"]
    policyNo <- map["policyNo"]
    title <- map["title"]
}

}

我的FirstViewController，我将数据发送到此模型类

 func getUserProfileDataFromApi(){
    //Calling the method from Api class
    userProfileApi{completion in self.getProfileData(result: completion)}
}

func userProfileApi(completion:@escaping (_ result:UserProfileData)->()) {
let defaultObject = UserDefaults.standard
let headerToken = defaultObject.object(forKey: KHeaderToken) as! String
let headers = ["Authorization": headerToken]

Alamofire.request(KProfileUrl, method: .post, encoding: JSONEncoding.default, headers: headers)
    .validate()
    .responseObject{ (response: DataResponse<UserProfileResponse>) in
        switch response.result{
        case .success:
            let value = response.result.value
            completion((value?.data)!)
        case .failure(let error):
            print(error.localizedDescription)
        }
}
}
func getProfileData(result: UserProfileData){
   // Here i get all data in firstViewController
}

Now how i can get the UserProfileData in secondViewController.

Answer 1

如果你使用segue从firstViewController显示secondViewController，那么你可以使用prepare segue来传递数据。

    override func prepare(for segue: UIStoryboardSegue, sender _: Any?) {
            let destinationViewController = segue.destination as! SecondViewController
 destinationViewController.userProfileData = self.userProfileData
}

然后你的secondViewController就像这样，额外的实现。

class SecondViewController{

var userProfileData:UserProfileData?
}

Answer 2

创建一个Signleton类，您可以在其中从API响应中填充UserProfileData。

Diff= c(0.0,1.7,3.2,-0.7,-1.0,2.2,-2,-0.9)
s <- data.frame(Diff)

# define indexes of subgroups of consecutive positive or negative numbers
RLE <- rle(Diff>=0)
RLE$values <- 1:length(RLE$values)
subgrps <- inverse.rle(RLE)

# aggregate by subgroups, create indexes or zero for each subgroup and add to the data.frame
s$Expected_Seq <- unlist(tapply(Diff,INDEX=subgrps,function(x) ifelse(x < 0,0,1:length(x))))

> s
  Diff Expected_Seq
1  0.0            1
2  1.7            2
3  3.2            3
4 -0.7            0
5 -1.0            0
6  2.2            1
7 -2.0            0
8 -0.9            0

你可以从这个单例中访问userProfileData，但只有在你第一次退出并且启动它时才会这样做。不会在那里将你的信息存储在UserDefaults中。

如何在swift 3中的另一个ViewController中获取Mappable模型类数据

2 个答案: