# Swift开发-Swift项目中常用到的第三方库框架-网络库

最近在开发一个新Swift的项目，没怎么写，会陆续跟新我在项目中遇到或者解决的问题！
项目的开始，必定是先使用cocoapods导入所依赖的框架

1.Alamofire Star:24000

Alamofire 是 Swift 语言编写的 HTTP 网络库。相当于OC中的AFNetworking

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!

target '' do
    pod 'Alamofire', '~> 4.4'
end

简单的使用

1.Use GET
Alamofire.request("https://httpbin.org/get").responseJSON { response in
    print("Request: \(String(describing: response.request))")   // original url request
    print("Response: \(String(describing: response.response))") // http url response
    print("Result: \(response.result)")                         // response serialization result

    if let json = response.result.value {
        print("JSON: \(json)") // serialized json response
    }

    if let data = response.data, let utf8Text = String(data: data, encoding: .utf8) {
        print("Data: \(utf8Text)") // original server data as UTF8 string
    }
}

2.响应
响应可以序列化成你想要的类型data,json,string...
.responseString { response in
        print("Response String: \(response.result.value)")
}
.responseJSON { response in
        print("Response JSON: \(response.result.value)")
}
.responseData { response in
        print("Response JSON: \(response.result.value)")
}

3.也可以添加验证 statusCode contentType
Alamofire.request("https://httpbin.org/get")
    .validate(statusCode: 200..<300)
    .validate(contentType: ["application/json"])
    .responseData { response in
        switch response.result {
        case .success:
            print("Validation Successful")
        case .failure(let error):
            print(error)
        }
}

4.上传图片
Alamofire.upload(
    multipartFormData: { multipartFormData in
        multipartFormData.append(self.getData(image: value), withName: "上传的key", fileName: "文件名", mimeType: "类型"->"image/jpg")
        // 其他参数
        multipartFormData.append("其他参数value".data(using: .utf8)!, withName: "其他参数key")
    },
    to: "https://httpbin.org/post",
    encodingCompletion: { encodingResult in
        switch encodingResult {
        case .success(let upload, _, _):
            upload.responseJSON { response in
                debugPrint(response)
            }
        case .failure(let encodingError):
            print(encodingError)
        }
    }
)
// 图片限制大小500k
fileprivate func getData(image: UIImage) -> Data {
        
        var multiple = CGFloat(1.0)
        var imageData = UIImageJPEGRepresentation(image, multiple) ?? Data()
        var sizeOriginKB = imageData.count / 1024
        let maxSize = 500
        
        while sizeOriginKB > maxSize && multiple > 0.1 {
            multiple = multiple - 0.1
            imageData = UIImageJPEGRepresentation(image, multiple) ?? Data()
            sizeOriginKB = imageData.count / 1024
        }
        
        return imageData
}

就先说到这些基础使用其余的可以去git上都很全面

2.Moya Star:6600

• 网络层这一块用Alamofire,如同于在oc中用AFNetworking.但是,如果你直接使用的话,会使得各种网络请求操作分布很凌乱,Moya是对 Alamofire的进一步封装。
• 秉着实用主意直接上代码

// MARK:- 属性
static let sharedInstance = Networking()
let requestTimeoutClosure = { (endpoint: Endpoint, done: @escaping MoyaProvider.RequestResultClosure) in
        guard var request = endpoint.urlRequest else { return }
        request.timeoutInterval = 20.0    //设置请求超时时间
        done(.success(request))
    }
public var provider = MoyaProvider()
provider = MoyaProvider(requestClosure: requestTimeoutClosure)
发送请求
public func requestData(type: Service, finished : @escaping (_ result : String?) -> ()) {
        provider.request(type) { result in
            switch result {
            case let .success(response):
                let json: String = self.parserXML.parserXML(data: response.data)
                break
            case let .failure(error):
                DDLog(error.localizedDescription)
                break
            }
        }
    }

可能会产生疑问 地址呢 参数呢
Moya使用枚举来枚举你所有的 API targets。你可以把所有关于这个API的信息放在这个枚举类型中。
这个枚举类型用来在编译的阶段给每个target提供具体的信息，每个枚举的值必须有发送http request需要的基本参数，像url，method，parameters等等。这些要求被定义在一个叫做TargetType的协议中，在使用过程过我们的枚举类型需要服从这个协议。通常我们把这一部分的代码写在枚举类型的扩展里。

public enum Service {
    case .login(account: String, password: String)
}

extension Service: TargetType {
    
    
    public var baseURL: URL {
        return URL(string: URL_PREFIX)!
    }
    
    public var path: String {
        return "/xxxx/xxxxx/gateway.in"
    }
    
    public var method: Moya.Method {
        switch self {
        case .login:
            return .post
        }
    }
    public var parameters: [String: Any]? {
        switch self {
        case .login(let picType, let picFile, let paymentId, _):
            return ["account": account, "password":password]
        }
    }
    public var parameterEncoding: ParameterEncoding {
        return URLEncoding.default
    }

    public var sampleData: Data {
        return "{}".data(using: String.Encoding.utf8)!
    }
}