iOS开发中网络数据请求

开发�工作数据请求一般都是用第三方的框架，OC用AFNetworking,Swift用Alamofire，很少用原生。

AFNetworking

一般会在AFNetworking上简单的封装一层，暴露出get,post和文件上产三个接口

Alamofire

API用的的是APIStore

遇到的问题

问题一：http传输不符合苹果网络安全策略

**App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.**
**FAILURE: Error Domain=NSURLErrorDomain Code=-1022 "The resource could not be loaded because the App Transport Security policy requires the use of a secure connection." UserInfo={NSUnderlyingError=0x7fd9d9d1d590 {Error Domain=kCFErrorDomainCFNetwork Code=-1022 "(null)"}, NSErrorFailingURLStringKey=http://apis.baidu.com/showapi_open_bus/showapi_joke/joke_text?apikey=5ac26d9bf3cb087732ceef3ff42ab3ff&page=1, NSErrorFailingURLKey=http://apis.baidu.com/showapi_open_bus/showapi_joke/joke_text?apikey=5ac26d9bf3cb087732ceef3ff42ab3ff&page=1, NSLocalizedDescription=The resource could not be loaded because the App Transport Security policy requires the use of a secure connection.}**

解决方案
在plist中添加相应的key

Paste_Image.png

问题二： 少配置http头内容

解决方案：

let headers = [ "Authorization": "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==", "Accept": "application/json"]Alamofire.request(.GET, 
"https://httpbin.org/get", headers: headers) .responseJSON { 
              response in debugPrint(response)
 }

Demo

import UIKit
import Alamofire
import EVReflection
let apiKey = "5ac26d9bf3cb087732ceef3ff42ab3ff"

class testObject: EVObject {
    var showapi_res_code = ""
    var showapi_res_error = ""
    var name = ""
    var allPages = ""
    var ret_code = ""
    var id = ""
    var text = ""
    var title = ""
    var type = ""
    var ct = ""
    var currentPage = ""
    var allNum = ""
    var maxResult = ""
    var showapi_res_body:testObject?
    var contentlist:[testObject] = []
}

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        setupData()
    }
    
    func setupData() {
        let header = ["apikey":apiKey]
        
        Alamofire.request(.GET, "http://apis.baidu.com/showapi_open_bus/showapi_joke/joke_text", parameters: ["page":"1"],headers:header).responseJSON { response in
            let json : [String : AnyObject] = response.result.value as! [String : AnyObject]
            let object:testObject = testObject(dictionary:json )
            let arr:[testObject] = (object.showapi_res_body?.contentlist)!
            let test:testObject = arr[0]
            print("\(test.text)")
        }
    }
}

判断网络状态

方案一：在UI层处理

在controller或者viewModel进行数据请求，请求不通的时候根据code值提示网络链接错误。

方案二：在网络层进行处理

在封装网络层时直接处理了，我觉得这种处理方案比较好。

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) { 
      NSLog(@"Reachability: %@",AFStringFromNetworkReachabilityStatus(status));
}];
[[AFNetworkReachabilityManager sharedManager] startMonitoring];