TwoAlamofireFailSomtime.swift

import UIKit
import Alamofire



class RentViewController: UIViewController,UITableViewDataSource,UITableViewDelegate,NSURLSessionDataDelegate,NSURLSessionDelegate {
    
    
    // outlet
    @IBOutlet weak var toyTableView: UITableView!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        //        getJsonData(jsonURl) // download json data by url
        getJsonData(dataURL.rentJsonURL,jsonImageURL:dataURL.rentJsonImageURL) // download json data by url
        
        
        //添加刷新
        refreshControl.addTarget(self, action: #selector(RentViewController.refreshData), forControlEvents: UIControlEvents.ValueChanged)
        refreshControl.attributedTitle = NSAttributedString(string: "刷新資料")
        toyTableView.addSubview(refreshControl)
    }
    
    // 刷新数据
    func refreshData() {
        getJsonData(dataURL.rentJsonURL,jsonImageURL:dataURL.rentJsonImageURL) // download json data by url
    }
    
 
    
    //MARK: - GET JSON
    func getJsonData(jsonURL: String,jsonImageURL: String){
        
        // remove/clear cache
        NSURLCache.sharedURLCache().removeAllCachedResponses()
        
        
       /*********** Alamofire.request 001 ***********/
        Alamofire.request(.GET,jsonImageURL).responseJSON { (response) in
            print("in Alamofire.request 001")
            if let JSONImg = response.result.value{
                //check response.result success or not
                switch response.result {
                case .Success:
                    //把得到的JSON数据转为数组
                    print("========= 001 response case .Success:")
                case .Failure(let error):
                    print("========= 001 response case .Failure:")
                    print(error)
                }
                
                                 // Main Queue
                dispatch_async(dispatch_get_main_queue(),{
                    self.toyTableView.reloadData() // reload data
                    self.refreshControl.endRefreshing()
                    
                });
                print("Alamofire 001: End")
            }
        }// End of Alamofire 001
        
        
        /*********** Alamofire.request 002 ***********/
        Alamofire.request(.GET,jsonURL).responseJSON { (response) in
            print("in Alamofire.request 002")
            if let JSONImg = response.result.value{
                //check response.result success or not
                switch response.result {
                case .Success:
                    //把得到的JSON数据转为数组
                    print("========= 002 response case .Success:")
                case .Failure(let error):
                    print("========= 002 response case .Failure:")
                    print(error)
                }
                
                // Main Queue
                dispatch_async(dispatch_get_main_queue(),{
                    self.toyTableView.reloadData() // reload data
                    self.refreshControl.endRefreshing()
                    
                });
                print("Alamofire 002: End")
            }
        }// End of Alamofire 002
    }// End of getJsonData function
    
    
}