我是IOS的新手。我正在使用Alamofire发出网络请求。我在追踪...方面非常成功。
我对OOP有很好的理解。而且我在android中有很好的工作经验。在android中，我使用了一个用于服务的集中式类，并从活动中调用它，然后使用回调传递了结果。
这样，它更加紧凑，避免了我一次又一次地编写相同的代码。我对其进行搜索，发现委托与java / android中的Callbacks / Interfaces相同。
我的问题：
谁能告诉我如何在一堂课中编写
Alamofire代码，以及如何 从其他视图控制器用不同的号码调用 参数类型。并以不同类型的结果发送回 进入相关的View控制器？ 迅速可以使用吗？
答案 0 :(得分：2)
使用WebServicesCall或您的首选名称创建一个快捷文件，并使用以下代码。这里我正在使用SwiftyJSON和Alamofire。
import UIKit
import Alamofire
import SwiftyJSON
struct WebService {
static func requestService(url: URL, method: HTTPMethod, parameters: Parameters, headers: HTTPHeaders? = nil, showLoaderFlag: Bool, viewController: UIViewController, completion: @escaping (_ success: JSON) -> Void) {
/* check for internet connection */
if(Reachability.isConnectedToNetwork()) {
/* Show Loader here */
print("Web Service - \(url)")
print("Header - \(String(describing: headers))")
print("Parameters - \(parameters)")
/* Request configure */
AlmofireService.Manager.request(url, method: method, parameters: parameters, encoding: JSONEncoding.default, headers: header) .responseJSON { response in
print("Response - \(response)")
switch response.result {
case .success(_):
/* Hide loader here */
let json = JSON(response.result.value!)
completion(json)
case .failure(_):
print("Request failed with error: \(response.result.error ?? "" as! Error)")
if response.result.error?._code == NSURLErrorTimedOut {
//TODO: show response time out alert or message here
} else {
//TODO: show response failure alert or message here
}
/* Hide loader here */
completion(JSON.null)
}
}
} else {
print("No internet connection")
//TODO: show no internet connection alert or message here
let json: JSON = ["status": "nointernet",
"code": 503]
completion(json)
}
}
}
然后在需要时致电如下
func callWebService() {
let parameters: [String: Any] = ["key": "value"] //for post request
let headers: [String: String] = ["key": "value"]
let url = //your url here
WebService.requestService(url: url, method: .post, parameters: parameters, headers: headers, showLoaderFlag: true, viewController: self, completion: { response in
guard response["code"].int != 503 else {
print("No internet connection")
return
}
guard response != .null else {
return
}
/* Handle your success response here */
})
}
答案 1 :(得分：1)
创建一个NSObject类，并在其中创建一个类级别的函数。并从其他任何班级中调用它
import Alamofire
class Network: NSObject {
class func API_PostData(_ strURL: String, parameter Params: NSDictionary, successWithStatus1Closure: @escaping (AnyObject?) -> (), successWithStatus0Closure: @escaping (AnyObject?) -> (), failurClosure: @escaping (String?)-> ())
{
let Param: [String: Any] = Params.mutableCopy() as! [String : Any]
let complite_url = BASE_URL+strURL
if Reachability.isConnectedToNetwork(){
Alamofire.request(complite_url, method: .post, parameters: Param ,encoding: JSONEncoding.default).responseJSON {
response in
if(response.result.error != nil)
{
let error = response.result.error
if (error?.localizedDescription == "The request timed out."){
failurClosure("The request timed out.");
return
}
if (error?.localizedDescription == "Could not connect to the server."){
failurClosure("Could not connect to the server.");
return
}
if (error?.localizedDescription == "The network connection was lost."){
failurClosure("The network connection was lost.");
return
}
}
let dictResponse = response.result.value as? NSDictionary
print("Response",response)
if dictResponse is Dictionary<AnyHashable,Any> {
print("Yes, it's a Dictionary")
}
else{
print("No, it's a not a Dictionary")
failurClosure("Active internet connection required")
return
}
let isSuccess = dictResponse!["success"] as! Int
if isSuccess == 1
{
successWithStatus1Closure(dictResponse)
}else{
successWithStatus0Closure(dictResponse)
}
}
}else {
print("Active internet connection required");
failurClosure("Active internet connection required")
return
}
}
}
并像
一样使用它Network.API_PostData
和xCode将自动完成该方法
在您的视图控制器中使用示例创建方法
func callApi(){
let para = ["user_id" : USER_ID_STR,
"page" : String(page),
"item_per_page" : "15"
] as NSDictionary
SVProgressHUD.show()
GlobalClass.API_PostData("notifications/activities", parameter: para, successWithStatus1Closure: { (response) in
print("response \(response)")
SVProgressHUD.dismiss()
}, successWithStatus0Closure:{ (response) in
print("response \(response)")
SVProgressHUD.dismiss()
}, failurClosure: { (error) in
print("error \(error ?? "ddd")")
GlobalClass.showAlert(alertTitle: "", alertMsg: error!, view: self)
SVProgressHUD.dismiss()
})
}
并像
那样称呼它callApi()
答案 2 :(得分：0)
您可以通过编写回调方法或关闭来满足您的要求。例如：
func yourMethodName(completion:@escaping (YourModelClass) -> Void,onError:@escaping (Error) -> Void) {
let dataRequest = RequestObject()
dataRequest.apiURL = YourApiURl
dataRequest.headers = DesiredHeaders
dataRequest.requestType = RequestType
//This will be your method for the webservice call, whenever you get success or error, return a callback to the calling class via completion.
NetworkManager.getDataFor(Request: dataRequest, success: {response in
//print(response.responseObject!)
let model = YourModelClass.init(WithDictionary: response.responseObject as? [String : Any])
completion(model)
}, failure: {error in
onError(error)
})
}
希望这会有所帮助。 对于任何查询，请随时发表评论。
答案 3 :(得分：0)
尝试一下
快速
在WebService类中：发布通知
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "yourNotificationName"), object: nil)
在您要接收响应的类中：首先注册该通知，然后编写处理该通知的方法。 您将相应的选择器赋予该方法。 //视图确实加载
NotificationCenter.default.addObserver(self, selector: #selector(yourClass.handleUpdatedData), name: NSNotification.Name(rawValue: "yourNotificatioName"), object: nil)
-(void)handleUpdatedData:(NSNotification *)notification {
NSLog(@"recieved");
[self.tableView reloadData];
}
目标C ...
在WebService类中：发布通知
[[NSNotificationCenter defaultCenter] postNotificationName:@"DataUpdated"
object:self];
在您要接收响应的类中：首先注册该通知，然后编写处理该通知的方法。 您将相应的选择器赋予该方法。 //视图确实加载
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleUpdatedData:)
name:@"DataUpdated"
object:nil];
-(void)handleUpdatedData:(NSNotification *)notification {
NSLog(@"recieved");
[self.tableView reloadData];
}