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[英]Handling JSON with Alamofire & SwiftyJSON and Adding to UITableView in Swift
[英]Swift: Handling JSON with Alamofire & SwiftyJSON
这个肯定要问好几遍了,虽然我一直很努力地寻找,但我还没有找到正确的答案。
我使用 Alamofire 和 SwiftyJSON,我的 JSON 数据如下所示:
{
"528" : {
"name" : "Name 1",
"id" : "528",
"product_id" : null,
"visible" : "0",
"level" : "2"
},
"29" : {
"name" : "Name 2",
"id" : "29",
"product_id" : null,
"visible" : "1",
"level" : "1"
},
"173" : {
"name" : "Name 3",
"id" : "173",
"product_id" : null,
"visible" : "0",
"level" : "2"
},
"143" : {
"name" : "Name 4",
"id" : "143",
"product_id" : null,
"visible" : "1",
"level" : "2"
},
...使用此代码:
Alamofire.request(.GET, dataURL, parameters: nil, encoding: .JSON)
.responseJSON { (request, response, jsonData, error) in
let json = JSON(jsonData!)
println(json)
}
...所以 JSON 一切都应该没问题
我如何访问这些数据? 我的意思是如何获得姓名、ID、product_ids 等
我怎样才能把数据(名称)放到我的 TableViewController 中?
我在我的一个项目中同时使用 SwiftyJSON 和 Alamofire。 这是我如何使用它。
// Step 1
protocol APIProtocol {
func didReceiveResult(results: JSON)
}
// Step 2
func get(path: String, parameters: [String: AnyObject]? = nil, delegate: APIProtocol? = nil){
let url = "\(self.hostname)\(path)"
NSLog("Preparing for GET request to: \(url)")
Alamofire.request(.GET, url, parameters: parameters)
.responseJSON { (req, res, json, error) in
if(error != nil) {
NSLog("GET Error: \(error)")
println(res)
}
else {
var json = JSON(json!)
NSLog("GET Result: \(json)")
// Call delegate if it was passed into the call
if(delegate != nil) {
delegate!.didReceiveResult(json)
}
}
}
}
// Step 3
class ActivityViewController: UITableViewController, APIProtocol {
var activityModelList: NSMutableArray = [] // This is the array that my tableView is using.
...
func didReceiveResult(result: JSON) {
var activities: NSMutableArray = []
NSLog("Activity.didReceiveResult: \(result)")
for (index: String, activity: JSON) in result {
var activityModel = ActivityModel(
id: activity["id"].intValue,
message: activity["message"].stringValue
)
activities.addObject(activityModel)
}
// Set our array of new models
activityModelList = activities
// Make sure we are on the main thread, and update the UI.
dispatch_sync(dispatch_get_main_queue(), {
self.refreshControl!.endRefreshing()
self.tableView.reloadData()
})
}
}
// Step 4
override func viewDidLoad() {
MyAPI.get("/activities", delegate: self)
}
访问器(至少对于 SwiftyJSON)的工作方式如下:
if let userName = json[0]["528"]["name"].string{
println(userName) // "Name 1"
}
有关如何使用 SwiftyJSOn 的更多信息可以在其官方文档中找到: https : //github.com/SwiftyJSON/SwiftyJSON
关于如何将数据放入 UITableView,有很多方法。 例如,设置一个 UITableView 单元格,然后以某种数组的形式加载 JSON 数据。
检查此 repo 的示例,该示例声明如何在代码中使用 Alamofire 以及如何使用快速和解析 JSON 响应创建模型
在你的类中定义这些变量
typealias complitionBlock = (data: AnyObject) -> Void let KBASE_URL: String = "http://static.westwing.de/cms/dont-delete/programming_task/data.json"
设置此函数的实现
func getMainItems(complition block: complitionBlock) { Alamofire.request(.GET, KBASE_URL, parameters:nil).responseJSON { response in do { let items = try NSJSONSerialization.JSONObjectWithData(response.data!, options: NSJSONReadingOptions()) as! NSArray let mutableArray: NSMutableArray = [] items.enumerateObjectsUsingBlock({ object, index, stop in let str = object as! NSDictionary //Replace WESItem with your model //let item = WESItem(dictionary: str as NSDictionary) mutableArray.addObject(item) }) block(data: mutableArray) } catch { print(error) } } }
以下应该对你有用:-
var nameArr = [String]()
Alamofire.request(.GET,"your url", parameters: nil)
.validate().responseJSON { response in
if let responseJson = response.result.value {
let name = responseJson["name"] as! String
nameArr.append(name)
}
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
})
}// Alamofire Close
Use tableview as you normally use it i.e.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("cell")
if cell == nil {
cell = UITableViewCell(style: .Default, reuseIdentifier: "cell")
}
cell!.textLabel?.text = nameArr[indexPath.row]
return cell!
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return nameArr.count
}
注意:不需要使用 Swifty JSON,因为 Alamofire 允许 JSON 响应,可以在“.responseJSON”中直接处理。
pod 'Alamofire' pod 'SwiftyJSON' pod 'ReachabilitySwift'
import UIKit import Alamofire import SwiftyJSON import SystemConfiguration
class WebServiceHelper: NSObject {
typealias SuccessHandler = (JSON) -> Void
typealias FailureHandler = (Error) -> Void
// MARK: - Internet Connectivity
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
// MARK: - Helper Methods
class func getWebServiceCall(_ strURL : String, isShowLoader : Bool, success : @escaping SuccessHandler, failure : @escaping FailureHandler)
{
if isConnectedToNetwork() {
print(strURL)
if isShowLoader == true {
AppDelegate.getDelegate().showLoader()
}
Alamofire.request(strURL).responseJSON { (resObj) -> Void in
print(resObj)
if resObj.result.isSuccess {
let resJson = JSON(resObj.result.value!)
if isShowLoader == true {
AppDelegate.getDelegate().dismissLoader()
}
debugPrint(resJson)
success(resJson)
}
if resObj.result.isFailure {
let error : Error = resObj.result.error!
if isShowLoader == true {
AppDelegate.getDelegate().dismissLoader()
}
debugPrint(error)
failure(error)
}
}
}else {
CommonMethods.showAlertWithError("", strMessage: Messages.NO_NETWORK, withTarget: (AppDelegate.getDelegate().window!.rootViewController)!)
}
}
class func getWebServiceCall(_ strURL : String, params : [String : AnyObject]?, isShowLoader : Bool, success : @escaping SuccessHandler, failure :@escaping FailureHandler){
if isConnectedToNetwork() {
if isShowLoader == true {
AppDelegate.getDelegate().showLoader()
}
Alamofire.request(strURL, method: .get, parameters: params, encoding: JSONEncoding.default, headers: nil).responseJSON(completionHandler: {(resObj) -> Void in
print(resObj)
if resObj.result.isSuccess {
let resJson = JSON(resObj.result.value!)
if isShowLoader == true {
AppDelegate.getDelegate().dismissLoader()
}
success(resJson)
}
if resObj.result.isFailure {
let error : Error = resObj.result.error!
if isShowLoader == true {
AppDelegate.getDelegate().dismissLoader()
}
failure(error)
}
})
}
else {
CommonMethods.showAlertWithError("", strMessage: Messages.NO_NETWORK, withTarget: (AppDelegate.getDelegate().window!.rootViewController)!)
}
}
class func postWebServiceCall(_ strURL : String, params : [String : AnyObject]?, isShowLoader : Bool, success : @escaping SuccessHandler, failure :@escaping FailureHandler)
{
if isConnectedToNetwork()
{
if isShowLoader == true
{
AppDelegate.getDelegate().showLoader()
}
Alamofire.request(strURL, method: .post, parameters: params, encoding: JSONEncoding.default, headers: nil).responseJSON(completionHandler: {(resObj) -> Void in
print(resObj)
if resObj.result.isSuccess
{
let resJson = JSON(resObj.result.value!)
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
success(resJson)
}
if resObj.result.isFailure
{
let error : Error = resObj.result.error!
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
failure(error)
}
})
}else {
CommonMethods.showAlertWithError("", strMessage: Messages.NO_NETWORK, withTarget: (AppDelegate.getDelegate().window!.rootViewController)!)
}
}
class func postWebServiceCallWithImage(_ strURL : String, image : UIImage!, strImageParam : String, params : [String : AnyObject]?, isShowLoader : Bool, success : @escaping SuccessHandler, failure : @escaping FailureHandler)
{
if isConnectedToNetwork() {
if isShowLoader == true
{
AppDelegate.getDelegate().showLoader()
}
Alamofire.upload(
multipartFormData: { multipartFormData in
if let imageData = UIImageJPEGRepresentation(image, 0.5) {
multipartFormData.append(imageData, withName: "Image.jpg")
}
for (key, value) in params! {
let data = value as! String
multipartFormData.append(data.data(using: String.Encoding.utf8)!, withName: key)
print(multipartFormData)
}
},
to: strURL,
encodingCompletion: { encodingResult in
switch encodingResult {
case .success(let upload, _, _):
upload.responseJSON { response in
debugPrint(response)
//let datastring = String(data: response, encoding: String.Encoding.utf8)
// print(datastring)
}
case .failure(let encodingError):
print(encodingError)
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
let error : NSError = encodingError as NSError
failure(error)
}
switch encodingResult {
case .success(let upload, _, _):
upload.responseJSON { (response) -> Void in
if response.result.isSuccess
{
let resJson = JSON(response.result.value!)
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
success(resJson)
}
if response.result.isFailure
{
let error : Error = response.result.error! as Error
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
failure(error)
}
}
case .failure(let encodingError):
if isShowLoader == true
{
AppDelegate.getDelegate().dismissLoader()
}
let error : NSError = encodingError as NSError
failure(error)
}
}
)
}
else
{
CommonMethods.showAlertWithError("", strMessage: Messages.NO_NETWORK, withTarget: (AppDelegate.getDelegate().window!.rootViewController)!)
}
}
}
==================================
调用方法
让 aParams : [String : String] = ["DeviceIDString", "DeviceType" : "iOS", ]
WebServiceHelper.postWebServiceCall(Constants.BaseURL, params: aParams as [String : AnyObject]?, isShowLoader: true, success: { (responceObj) in
if "\(responceObj["RespCode"])" != "1"
{
let alert = UIAlertController(title: Constants.kAppName, message: "\(responceObj["RespMsg"])", preferredStyle: UIAlertControllerStyle.alert)
let OKAction = UIAlertAction(title: "OK", style: .default) { (action:UIAlertAction!) in
}
alert.addAction(OKAction)
self.present(alert, animated: true, completion: nil)
}
else
{
let aParams : [String : String] = [
"Password" : self.dictAddLogin[AddLoginConstants.kPassword]!,
]
CommonMethods.saveCustomObject(aParams as AnyObject?, key: Constants.kLoginData)
}
}, failure:
{ (error) in
CommonMethods.showAlertWithError(Constants.kALERT_TITLE_Error, strMessage: error.localizedDescription,withTarget: (AppDelegate.getDelegate().window!.rootViewController)!)
})
}
// 使用 alamofire 获取 json 数据 swiftjson
// 首先使用 Alamofire
//第二个在tableView中的fatch json数据
// 创建json模型类model1
// MODEL2
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