swift常用三方库简单介绍，详细用法可见github上库介绍

1. 'Alamofire' 网络库
2. 'SnapKit' 布局约束
3. 'SwiftyJSON' json解析

1. 'Alamofire' 网络库

   //登录 post
    class func login(_ phone:NSString, _ password:NSString, _ success:@escaping VoidClosure){
        let url = hostUrl + "uaa/oauth/token"
        let loginRequest = ["username":phone,"password":password,"grant_type":"password"]
        let headers = ["client_secret":"123456","Authorization":"Basic ZGVmYXVsdDoxMjM0NTY="]
        Alamofire.request(url, method: .post, parameters: loginRequest, encoding: URLEncoding.default, headers: headers).validate().responseJSON { response in
            switch response.result {
            case .success:
                do {
                    if  let Json = response.result.value{
                        print("Json:\(Json)")
                    }
                    success ()
                }
            case .failure(let error):
                print(error)
            }
        }
    }

    //获取用户信息 get
    class func getUserInfo(success:@escaping AnyClosure){
        let headers = ["client_id":"default","Content-Type":"application/json","app_id":"prop-pro-ios","Authorization":UserDefaults.standard.object(forKey: Authorization as String)]

        Alamofire.request(hostUrl + "uaa/users/profile", method: .get, parameters: nil, encoding: URLEncoding.default, headers: headers as? HTTPHeaders).validate().responseJSON { response in
            switch response.result {
            case .success(let value):
                do{
                    let jsonData = JSON(value)
                    SwiftUser.shareInstance = SwiftUser(json: jsonData)
                    success (jsonData as AnyObject)
                }
            case .failure(let error):
                print(error)
            }
        }
    }
}

2.'SnapKit' 布局约束

//这个其实跟masonry非常非常类似，用的是.语法，“snp.makeConstraints”相当于ma s_makeConstraints,"$0"相当于make

  versionLabel.snp.makeConstraints{
            $0.left.equalTo(50)
            $0.centerX.equalToSuperview()
            $0.top.equalTo(30)
        }

        logoImgView.snp.makeConstraints {
            $0.left.equalToSuperview().offset(150)
            $0.width.height.equalTo(80)
            $0.centerX.equalToSuperview()
            $0.top.equalToSuperview().offset(100)
        }

        nameTextField.snp.makeConstraints {
            $0.centerX.equalToSuperview()
            $0.top.equalTo(logoImgView.snp_bottom).offset(30)
            $0.size.equalTo(CGSize(width: 200, height: 40))
        }

        passwordTextField.snp.makeConstraints {
            $0.centerX.equalToSuperview()
            $0.top.equalTo(nameTextField.snp_bottom).offset(30)
            $0.width.height.equalTo(nameTextField)
        }

        loginBtn.snp.makeConstraints{
            $0.centerX.equalToSuperview()
            $0.top.equalTo(passwordTextField.snp_bottom).offset(10)
            $0.size.equalTo(CGSize(width: 200, height: 60))
        }

        infoTextView.snp.makeConstraints{
            $0.centerX.equalToSuperview()
            $0.top.equalTo(loginBtn.snp_bottom).offset(10)
            $0.left.equalTo(30)
            $0.height.equalTo(100)
        }

        swiftSwitch.snp.makeConstraints{
            $0.top.equalTo(infoTextView.snp_bottom).offset(10)
            $0.left.equalTo(30)
            $0.size.equalTo(CGSize(width: 60, height: 30))
        }

        stepper.snp.makeConstraints{
            $0.centerY.equalTo(swiftSwitch)
            $0.left.equalTo(swiftSwitch.snp_right).offset(50)
            $0.size.equalTo(CGSize(width: 100, height: 30))
        }

        slider.snp.makeConstraints{
            $0.top.equalTo(swiftSwitch.snp_bottom).offset(10)
            $0.centerX.equalToSuperview()
            $0.size.equalTo(CGSize(width: 210, height: 10))
        }

        progress.snp.makeConstraints{
            $0.top.equalTo(slider.snp_bottom).offset(10)
            $0.centerX.equalToSuperview()
            $0.size.equalTo(CGSize(width: 210, height: 3))
        }

        segment.snp.makeConstraints{
            $0.top.equalTo(progress.snp_bottom).offset(10)
            $0.centerX.equalToSuperview()
            $0.size.equalTo(CGSize(width: 210, height: 35))
        }

3.'SwiftyJSON' json解析

import UIKit
import SwiftyJSON

class SwiftUser: NSObject {
    var phoneNumber,avatar,name,birthdate,gender,id :String?
    var loginProviders : Array<NSString>?
    
    static var shareInstance = SwiftUser(json: "")
    
//类需要有一个init构造函数
    init(json: JSON) {
        phoneNumber = json["phoneNumber"].stringValue
        avatar = json["avatar"].stringValue
        name = json["name"].stringValue
        birthdate = json["birthdate"].stringValue
        gender = json["gender"].stringValue
        id = json["id"].stringValue
        loginProviders = json["loginProviders"].arrayObject as? Array<NSString>
        let aa = 10 + SCREEN_W
        print(aa)
    }
}

        Alamofire.request("http://www.xxx.host", method: .get, parameters: nil, encoding: URLEncoding.default, headers: headers as? HTTPHeaders).validate().responseJSON { response in
            switch response.result {
            case .success(let value):
                do{
                    let jsonData = JSON(value)
                    SwiftUser.shareInstance = SwiftUser(json: jsonData)
                    success (jsonData as AnyObject)
                }
            case .failure(let error):
                print(error)
            }
        }