REST API呼び出しをSwiftで行う
Swiftを使用してREST APIにGET呼び出しを行おうとしており、多数のチュートリアルを実行しようとしましたが、理解できません。 Obj-CをすべてSwiftに変換する方法がわからないか、n 'のようなメソッドの半分が廃止されているためです。誰かが呼び出しを行う方法を知っていて、返されたJSONデータを解析しますか？
あなたはこのようにすることができます：
var url : String = "http://google.com?test=toto&test2=titi"
var request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: url)
request.HTTPMethod = "GET"
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary
if (jsonResult != nil) {
// process jsonResult
} else {
// couldn't load JSON, look at error
}
})
編集：これに問題がある人々のために、あなたのJSONストリームはオブジェクト{}ではなく配列[]なので、jsonResultを
NSArrayではなくNSDictionaryに変更する必要があります
NSURLSession apiは、この状況に適していると思います。 Swiftコードを記述する場合、プロジェクトターゲットは少なくともiOS 7であり、iOS 7はNSURLSession apiをサポートしているためです。とにかくここにコードがあります
let url = "YOUR_URL"
NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)) { data, response, error in
// Handle result
}.resume()
SwiftでNSURLSessionを使用したREST APIリクエストの完全なコードは次のとおりです。
For GET Request
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let urlString = NSString(format: "your URL here")
print("get wallet balance url string is \(urlString)")
//let url = NSURL(string: urlString as String)
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%@", urlString) as String)
request.HTTPMethod = "GET"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let dataTask = session.dataTaskWithRequest(request) {
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
print("response is \(response)")
do {
let getResponse = try NSJSONSerialization.JSONObjectWithData(receivedData, options: .AllowFragments)
EZLoadingActivity .hide()
// }
} catch {
print("error serializing JSON: \(error)")
}
break
case 400:
break
default:
print("wallet GET request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
POSTリクエストの場合...
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let params = ["username":bindings .objectForKey("username"), "provider":"walkingcoin", "securityQuestion":securityQuestionField.text!, "securityAnswer":securityAnswerField.text!] as Dictionary<String, AnyObject>
let urlString = NSString(format: “your URL”);
print("url string is \(urlString)")
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%@", urlString)as String)
request.HTTPMethod = "POST"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(params, options: [])
let dataTask = session.dataTaskWithRequest(request)
{
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
if response == "SUCCESS"
{
}
default:
print("save profile POST request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
うまくいくことを願っています。
Swift 5＆4
let params = ["username":"john", "password":"123456"] as Dictionary<String, String>
var request = URLRequest(url: URL(string: "http://localhost:8080/api/1/login")!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in
print(response!)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! Dictionary<String, AnyObject>
print(json)
} catch {
print("error")
}
})
task.resume()
Swift 2用に編集
let url = NSURL(string: "http://www.test.com")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in
print(NSString(data: data!, encoding: NSUTF8StringEncoding))
}
task.resume()
Swift 4-GETリクエスト
var request = URLRequest(url: URL(string: "http://example.com/api/v1/example")!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with: request, completionHandler: { data, response, error -> Void in
do {
let jsonDecoder = JSONDecoder()
let responseModel = try jsonDecoder.decode(CustomDtoClass.self, from: data!)
print(responseModel)
} catch {
print("JSON Serialization error")
}
}).resume()
HTTPSを使用せずにエンドポイントにアクセスしている場合、App Transport Security Settingsを構成して例外にドメインを追加し、安全でないhttpリクエストを許可することを忘れないでください。
http://www.json4Swift.com/ のようなツールを使用して、JSON応答からコード化可能なマッピングを自動生成できます。
Swift 3.0
let request = NSMutableURLRequest(url: NSURL(string: "http://httpstat.us/200")! as URL)
let session = URLSession.shared
request.httpMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request as URLRequest, completionHandler: {data, response, error -> Void in
if error != nil {
print("Error: \(String(describing: error))")
} else {
print("Response: \(String(describing: response))")
}
})
task.resume()
スイフト4
Api PostメソッドでAlamofireを使用してアプリを作成する
Podファイルをインストールします-pod 'Alamofire'、Xcode 9のSwift 3の '〜> 4.0
Webservices.Swiftクラスを作成し、Alamofireをインポートします
デザインストーリーボード、ログインビュー
viewControllerClassに次のコードを挿入します
import UIKit
class ViewController: UIViewController {
@IBOutlet var usernameTextField: UITextField!
@IBOutlet var passwordTextField: UITextField!
var usertypeStr :String = "-----------"
var loginDictionary : NSDictionary?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func loginButtonClicked(_ sender: Any) {
WebServices.userLogin(userName: usernameTextField.text!, password: passwordTextField.text!,userType: usertypeStr) {(result, message, status )in
if status {
let loginDetails = result as? WebServices
self.loginDictionary = loginDetails?.loginData
if self.loginDictionary?["status"] as? String == "error"
{
self.alertMessage(alerttitle: "Login Error", (self.loginDictionary?["message"] as? String)!)
} else if self.loginDictionary?["status"] as? String == "ok" {
self.alertMessage(alerttitle: "", "Success")
}else {
self.alertMessage(alerttitle: "", (self.loginDictionary?["message"] as? String)!)
}
} else {
self.alertMessage(alerttitle: "", "Sorry")
}
}
}
func alertMessage(alerttitle:String,_ message : String){
let alertViewController = UIAlertController(title:alerttitle, message:message, preferredStyle: .alert)
alertViewController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertViewController, animated: true, completion: nil)
}
}
WebserviceClassの次のコードを挿入
import Foundation
import Alamofire
class WebServices: NSObject {
enum WebServiceNames: String {
case baseUrl = "https://---------------"
case UserLogin = "------------"
}
// MARK: - Login Variables
var loginData : NSDictionary?
class func userLogin(userName: String,password : String,userType : String, completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> ()) {
let url = WebServiceNames.baseUrl.rawValue + WebServiceNames.UserLogin.rawValue
let params = ["USER": userName,"PASS":password,"API_Key" : userType]
WebServices.postWebService(urlString: url, params: params as [String : AnyObject]) { (response, message, status) in
print(response ?? "Error")
let result = WebServices()
if let data = response as? NSDictionary {
print(data)
result.loginData = data
completion(result, "Success", true)
}else {
completion("" as AnyObject?, "Failed", false)
}
}
}
//MARK :- Post
class func postWebService(urlString: String, params: [String : AnyObject], completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void) {
alamofireFunction(urlString: urlString, method: .post, paramters: params) { (response, message, success) in
if response != nil {
completion(response as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
class func alamofireFunction(urlString : String, method : Alamofire.HTTPMethod, paramters : [String : AnyObject], completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void){
if method == Alamofire.HTTPMethod.post {
Alamofire.request(urlString, method: .post, parameters: paramters, encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
print(urlString)
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}else {
Alamofire.request(urlString).responseJSON { (response) in
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
}
//Mark:-Cancel
class func cancelAllRequests()
{
Alamofire.SessionManager.default.session.getTasksWithCompletionHandler { dataTasks, uploadTasks, downloadTasks in
dataTasks.forEach { $0.cancel() }
uploadTasks.forEach { $0.cancel() }
downloadTasks.forEach { $0.cancel() }
}
}
}
Swift 3で作業している場合、構文が変更されます。ここの例は私のために働いており、手順の良い説明があります： https://grokswift.com/simple-rest-with-Swift/
これはそのチュートリアルのコードです：
let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1"
guard let url = URL(string: todoEndpoint) else {
print("Error: cannot create URL")
return
}
let urlRequest = URLRequest(url: url)
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET on /todos/1")
print(error!)
return
}
// make sure we got data
guard let responseData = data else {
print("Error: did not receive data")
return
}
// parse the result as JSON, since that's what the API provides
do {
guard let todo = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
// now we have the todo
// let's just print it to prove we can access it
print("The todo is: " + todo.description)
// the todo object is a dictionary
// so we just access the title using the "title" key
// so check for a title and print it if we have one
guard let todoTitle = todo["title"] as? String else {
print("Could not get todo title from JSON")
return
}
print("The title is: " + todoTitle)
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
Swift 4
App plzインストールポッドファイルでALAMOFIREを使用する
ポッド「Alamofire」、「〜> 4.0」
JsonデータにAPIを使用できます- https://swapi.co/api/people/
その後、私たちのプロジェクトnetworkingService.Swiftのネットワーククラスを作成できます。
import Foundation
import Alamofire
typealias JSON = [String:Any]
class networkingService{
static let shared = networkingService()
private init() {}
func getPeople(success successblock: @escaping (GetPeopleResponse) -> Void)
{
Alamofire.request("https://swapi.co/api/people/").responseJSON { response in
guard let json = response.result.value as? JSON else {return}
// print(json)
do {
let getPeopleResponse = try GetPeopleResponse(json: json)
successblock(getPeopleResponse)
}catch{}
}
}
func getHomeWorld(homeWorldLink:String,completion: @escaping(String) ->Void){
Alamofire.request(homeWorldLink).responseJSON {(response) in
guard let json = response.result.value as? JSON,
let name = json["name"] as? String
else{return}
completion(name)
}
}
}
次に、NetworkingError.Swiftクラスを作成します
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
次に、Person.Swiftクラスを作成します
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: @escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
次に、DetailVC.Swiftを作成します
import UIKit
class DetailVC: UIViewController {
var person :Person!
@IBOutlet var name: UILabel!
@IBOutlet var birthyear: UILabel!
@IBOutlet var homeworld: UILabel!
@IBOutlet var eyeColor: UILabel!
@IBOutlet var skinColor: UILabel!
@IBOutlet var gender: UILabel!
@IBOutlet var hairColor: UILabel!
@IBOutlet var mass: UILabel!
@IBOutlet var height: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print(person)
name.text = person.name
birthyear.text = person.birthyear
eyeColor.text = person.eyecolor
gender.text = person.gender
hairColor.text = person.haircolor
mass.text = person.mass
height.text = person.height
skinColor.text = person.skincolor
person.homeWorld{(homeWorld) in
self.homeworld.text = homeWorld
}
}
}
次に、GetPeopleResponse.Swiftクラスを作成します
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
次に、View Controllerクラス
import UIKit
class ViewController: UIViewController {
@IBOutlet var tableVieww: UITableView!
var people = [Person]()
@IBAction func getAction(_ sender: Any)
{
print("GET")
networkingService.shared.getPeople{ response in
self.people = response.people
self.tableVieww.reloadData()
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
guard segue.identifier == "peopleToDetails",
let detailVC = segue.destination as? DetailVC,
let person = sender as AnyObject as? Person
else {return}
detailVC.person = person
}
}
extension ViewController:UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return people.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = people[indexPath.row].name
return cell
}
}
extension ViewController:UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "peopleToDetails", sender: people[indexPath.row])
}
}
StoryBoardで
plz識別子-peopleToDetailsのセグエを使用して別のビューとビューに接続します
最初のビューでUITableViewを使用します
UIButtonを使用してデータを取得する
DetailVcで9つのラベルを使用
Swift 3.3および4では、2つのパブリックメソッドを持つAPIManagerクラスを作成しました。必要なパラメーター、API名、リクエストタイプを渡すだけです。応答を取得し、クロージャーに渡します。
import UIKit
struct RequestType {
static let POST = "POST"
static let GET = "GET"
}
enum HtttpType: String {
case POST = "POST"
case GET = "GET"
}
class APIManager: NSObject {
static let sharedInstance: APIManager = {
let instance = APIManager()
return instance
}()
private init() {}
// First Method
public func requestApiWithDictParam(dictParam: Dictionary<String,Any>, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:@escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void) {
var apiUrl = “” // Your api url
apiUrl = apiUrl.appendingFormat("%@", apiName)
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
let url = URL(string: apiUrl)!
let HTTPHeaderField_ContentType = "Content-Type"
let ContentType_ApplicationJson = "application/json"
var request = URLRequest.init(url: url)
request.timeoutInterval = 60.0
request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request.addValue(ContentType_ApplicationJson, forHTTPHeaderField: HTTPHeaderField_ContentType)
request.httpMethod = requestType
print(apiUrl)
print(dictParam)
let dataTask = session.dataTask(with: request) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
// Second Method
public func requestApiWithUrlString(param: String, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:@escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void ) {
var apiUrl = "" // Your api url
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
var request: URLRequest?
if requestType == "GET" {
apiUrl = String(format: "%@%@&%@", YourAppBaseUrl,apiName,param)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let url = URL(string: apiUrl)!
request = URLRequest.init(url: url)
request?.httpMethod = "GET"
} else {
apiUrl = String(format: "%@%@", YourAppBaseUrl,apiName)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let bodyParameterData = param.data(using: .utf8)
let url = URL(string: apiUrl)!
request = URLRequest(url: url)
request?.httpBody = bodyParameterData
request?.httpMethod = "POST"
}
request?.timeoutInterval = 60.0
request?.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request?.httpShouldHandleCookies = true
let dataTask = session.dataTask(with: request!) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
if data != nil {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} else {
completionHendler(nil, error as NSError?, false)
}
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
}
// Here is example of calling Post API from any class
let bodyParameters = String(format: "appid=%@&appversion=%@","1","1")
APIManager.sharedInstance.requestApiWithUrlString(param: bodyParameters, apiName: "PASS_API_NAME", requestType: HtttpType.POST.rawValue, isAddCookie: false) { (dictResponse, error, success) in
if success {
if let dictMessage = dictResponse?["message"] as? Dictionary<String, AnyObject> {
// do you work
}
} else {
print("Something went wrong...")
}
}
}
/// Or just use simple function
func dataRequest() {
let urlToRequest = "" // Your API url
let url = URL(string: urlToRequest)!
let session4 = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let paramString = "data=Hello"
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session4.dataTask(with: request as URLRequest) { (data, response, error) in
guard let _: Data = data, let _: URLResponse = response, error == nil else {
print("*****error")
return
}
if let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue) {
print("****Data: \(dataString)") //JSONSerialization
}
}
task.resume()
}
モデルクラスを使用したAPI呼び出し
let urlString = "http://--.154.--.78/------/index.php?route=api/coupon/all"
let url = URL(string: urlString)
var request = URLRequest(url: url!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with:request) { (data, response, error) in
if error != nil {
print(error)
} else {
do {
let parsedDictionaryArray = try JSONSerialization.jsonObject(with: data!) as! [String:AnyObject]
print(parsedDictionaryArray)
if let arry = parsedDictionaryArray["data"] as? [[String:AnyObject]] {
for dic in arry {
let name = dic["name"]
let descriptionData = dic["description"]
self.modelReference.append(model(name: name as! String, descriptionStr: descriptionData as! String))
print(name!)
}
}
} catch let error as NSError {
print(error)
}
}
}.resume()
変数を作成し、モデルクラスと接続します
var modelReference = [model]()
モデルクラスの作成新規-> Swiftクラス
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
}
その後、Table Viewオブジェクトに接続できます
let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCellID")as! TableViewCell
cell.listName.text = modelReference[indexPath.row].name
let headers = [
"cache-control": "no-cache",
"postman-token": "6f8a-12c6-87a1-ac0f25d6385a"
]
let request = NSMutableURLRequest(url: NSURL(string: "Your url string")! as URL,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if error == nil && data != nil {
do {
// Convert NSData to Dictionary where keys are of type String, and values are of any type
let json = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String:AnyObject]
print(json)
//do your stuff
// completionHandler(true)
} catch {
// completionHandler(false)
}
}
else if error != nil
{
//completionHandler(false)
}
}).resume()
}