swift 获取网络接口数据 （今日新闻）newstoday
AppDelegate.swift--------------------------------------------------
import UIKit
importCoreData
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
varwindow:UIWindow?
funcapplication(_application:UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey:Any]?) ->Bool{
//新闻
letnewsVC =NewsViewController()
letnewsNav =UINavigationController.init(rootViewController: newsVC)
newsVC.navigationItem.title = "今日头条"
//收藏
letcollectVC =CollectViewController()
letcollectNav =UINavigationController.init(rootViewController:collectVC )
collectVC.navigationItem.title="我的收藏"
//标签栏控制器
lettabbar =UITabBarController()
tabbar.viewControllers= [newsNav,collectNav]
newsNav.tabBarItem.title="新闻"
collectNav.tabBarItem.title="收藏"
//窗口根视图控制器
self.window?.rootViewController= tabbar
return true
}
UIViewExtension.swift----------------------------------------------
importFoundation
import UIKit
extension UIView{
funcshowMBAlert(msg:String) ->Void{
//实例化
lethud = MBProgressHUD.init(view:self)
//设置为文本样式
hud?.mode = MBProgressHUDModeText
//设置隐藏时自动从父视图移除
hud?.removeFromSuperViewOnHide =true
//设置显示的文本
hud?.labelText = msg
//添加为view子视图
self.addSubview(hud!)
//显示
hud?.show(true)
//隐藏
hud?.hide(true, afterDelay:2.0)
}
}
NewsTableViewCell.swift--------------------------------------------
import UIKit
classNewsTableViewCell:UITableViewCell{
//图片视图
varimgView:UIImageView?
//标题标签
vartitleLable:UILabel?
//时间标签
vartimeLabel:UILabel?
//作者标签
varauthorLabel:UILabel?
funcinitUI() {
//图片视图
self.imgView=UIImageView.init(frame:CGRect.init(x:5, y:5, width:50, height:50))
//设置内容样式为fit样式
self.imageView?.contentMode = .scaleAspectFit
//加为cell的子视图
self.contentView.addSubview(self.imgView!)
//标题标签
self.titleLable=UILabel.init(frame:CGRect.init(x:60, y:5, width:scrW-65, height:35))
self.titleLable?.font=UIFont.systemFont(ofSize:18.0)
self.contentView.addSubview(self.titleLable!)
//时间标签
self.timeLabel=UILabel.init(frame:CGRect.init(x:60, y:42, width:100, height:13))
self.timeLabel?.font=UIFont.systemFont(ofSize:14.0)
self.timeLabel?.textColor = UIColor.lightGray
self.contentView.addSubview(self.timeLabel!)
//作者标签
self.authorLabel=UILabel.init(frame:CGRect.init(x:170, y:42, width:scrW-175, height:13))
self.authorLabel?.font=UIFont.systemFont(ofSize:14.0)
self.authorLabel?.textColor = UIColor.lightGray
self.contentView.addSubview(self.authorLabel!)
}
overrideinit(style:UITableViewCell.CellStyle, reuseIdentifier:String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.initUI()
}
requiredinit?(coder aDecoder:NSCoder) {
fatalError("init(coder:) has not been implemented")
}
overridefuncawakeFromNib() {
super.awakeFromNib()
// Initialization code
}
overridefuncsetSelected(_selected:Bool, animated:Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
News.h---------------------------------------------------
#import
NS_ASSUME_NONNULL_BEGIN
@interface News : NSObject
@property(nonatomic,copy)NSString * uniquekey;
@property(nonatomic,copy)NSString * title;
@property(nonatomic,copy)NSString * date;
@property(nonatomic,copy)NSString * category;
@property(nonatomic,copy)NSString * author_name;
@property(nonatomic,copy)NSString * url;
@property(nonatomic,copy)NSString * thumbnail_pic_s;
@property(nonatomic,copy)NSString* thumbnail_pic_s02;
@property(nonatomic,copy)NSString* thumbnail_pic_s03;
//把得到的json数据中的data数组转化为News数组
+(NSArray * )createNewsArrWithDataArr:(NSArray*)dataArr;
@end
NS_ASSUME_NONNULL_END
News.m--------------------------------------------------
#import"News.h"
@implementation News
+(NSArray*)createNewsArrWithDataArr:(NSArray*)dataArr{
//定义可变数组，用于储存News对象
NSMutableArray * newsArr = [[NSMutableArray alloc]init];
//遍历dataArr中的每个字典
for(NSDictionary* dicindataArr){
//将每个dic转换为News对象
News* one = [[Newsalloc]init];
//对one的属性赋值
[onesetValuesForKeysWithDictionary:dic];
//把每次循环生成的one对象加入到数组中
[newsArraddObject:one];
}
//在循环外，将NewsArr返回
return[newsArrcopy];
}
@end
NewsToday-Bridging-Header.h-----------------------------------------
#import"News.h"
#import "MJRefresh.h"
#import "MBProgressHUD.h"
#import "UIImageView+WebCache.h"
NewsViewController.swift-----------------------------------------------
import UIKit
///屏幕宽
let scrW = UIScreen.main.bounds.size.width
///屏幕高
let scrH = UIScreen.main.bounds.size.height
class NewsViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
//MARK:---------------------------属性----------------------------
//全局表格
var tbv:UITableView?
//表格数据
vartbvData:[News]?
//新闻标题
let titlesShow = ["头条","社会","国内","国际","娱乐","体育","军事"]
let titles = ["top","shehui","guonei","guoji","yule","tiyu","junshi"]
//分段控件
var titleSeg:UISegmentedControl?
//下拉刷新控件
var mjHeader:MJRefreshBaseView?
//MARK:----------------------viewDidLoad-----------------------
overridefuncviewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.white
//实例化分段控件
self.titleSeg = UISegmentedControl.init(items: titlesShow)
self.titleSeg?.frame=CGRect.init(x:0, y:64, width:scrW, height:40)
self.titleSeg?.selectedSegmentIndex = 0
self.titleSeg?.addTarget(self, action:#selector(titleSegDidChanged(seg:)), for:UIControl.Event.valueChanged)
self.titleSeg?.tintColor = UIColor.black
self.view.addSubview(self.titleSeg!)
//自动获取第一个标题的新闻数据
self.getURLData(title:titles[0])
//实例化表格
self.tbv=UITableView.init(frame:CGRect.init(x:0, y:64+40, width:scrW, height:scrH-64-40), style: .plain)
self.tbv?.delegate=self
self.tbv?.dataSource=self
self.tbv?.rowHeight=60
self.view.addSubview(self.tbv!)
//实例化下拉刷新控件
self.mjHeader = MJRefreshHeaderView.init(scrollView:self.tbv!)
self.mjHeader?.beginRefreshingBlock = {headViewin
self.getURLData(title:self.titles[(self.titleSeg!.selectedSegmentIndex)])
}
}
//MARK:----------------UI控件的触发方法----------------
//分段控制器的触发方法
@objcfunctitleSegDidChanged(seg:UISegmentedControl) ->Void{
//根据选中的分段下标获取对应的标题，获取网络数据
self.getURLData(title:titles[seg.selectedSegmentIndex])
}
//MARK:--------------------代理方法和数据源的实现--------------
functableView(_tableView:UITableView, numberOfRowsInSection section:Int) ->Int{
ifletcount =self.tbvData?.count{
returncount
}
return0
}
functableView(_tableView:UITableView, cellForRowAt indexPath:IndexPath) ->UITableViewCell{
letidentifier ="newsCell"
varcell = tableView.dequeueReusableCell(withIdentifier: identifier)as?NewsTableViewCell
ifcell ==nil{
cell =NewsTableViewCell.init(style: .subtitle, reuseIdentifier: identifier)
}
//根据行下标获取对应的News对象
if letoneNew =self.tbvData?[indexPath.row]{
//图片
cell?.imgView?.sd_setImage(with:URL.init(string: oneNew.thumbnail_pic_s))
//标题
cell?.titleLable?.text = oneNew.title
//时间
cell?.timeLabel?.text ="时间:\(oneNew.date)"
//作者
cell?.textLabel?.text ="作者:\(oneNew.author_name)"
}
returncell!
}
//MARK:-----------------获取网络数据的方法-------------------
funcgetURLData(title:String) ->Void{
//转动菊花等待指示器
UIApplication.shared.isNetworkActivityIndicatorVisible = true
//-------------------获取网络数据----------------
//将请求网址字符串做成URL对象
let url = URL.init(string: "http://v.juhe.cn/toutiao/index")
//创建请求对象,同时设置缓存策略策略及超时时长
varreq =URLRequest.init(url: url!, cachePolicy: .reloadRevalidatingCacheData, timeoutInterval:8.0)
//设置POST请求
req.httpMethod="POST"
//把请求参数拼成字符串
let appKey = "67968aeebf1f4e3b6170f7217b6f3cdb"
letparamStr ="key=\(appKey)&type=\(title)"
//将参数字符串转换为二进制Data数据
letparamData = paramStr.data(using: .utf8)
//将参数二进制数据放入请求体中
req.httpBody= paramData
//正式请求网络数据，使用URLSession
lettask =URLSession.shared.dataTask(with: req) { (data, response, error)in
//回到UI主线程停止转动指示器
DispatchQueue.main.async {
UIApplication.shared.isNetworkActivityIndicatorVisible = false
self.mjHeader?.endRefreshing()
}
//如果服务器错误，给客户提示
iferror !=nil{
DispatchQueue.main.async{
self.view.showMBAlert(msg:"服务器错误")
}
return
}
//如果没有错误，把得到的二进制数据转换为swift数组或字典数据,allowFragments表示使用一个不可变容器来存储
letjsonData =try?JSONSerialization.jsonObject(with: data!, options: .allowFragments)
//如果jsonData为nil表示转换失败，后天提供的json数据是错误的，你要及时和后台开发人员去反应
guardletrightJsonData = jsonDataelse{
DispatchQueue.main.async{
self.view.showMBAlert(msg:"网络数据错误")
}
return
}
//json数据解析，先获取error_code字段的值
letjsonDataDic = rightJsonDataas!NSDictionary
leterror_code = jsonDataDic["error_code"]as!Int
//如果值不是0 ，表示错误，把reason获取展示给用户
iferror_code !=0{
letreason = jsonDataDic["reason"]as!String
DispatchQueue.main.async{
self.view.showMBAlert(msg: reason)
}
return
}
//如果是0，把result字典中的data数据取出
letresultDic = jsonDataDic["result"]as!NSDictionary
letdataArr = resultDic["data"] as!NSArray
print(dataArr)
//将dataArr转换为News数组，赋值给表格数据数组
self.tbvData = News.createNewsArr(withDataArr: dataArras! [Any])
//回到UI主线程，刷新表格
DispatchQueue.main.async {
self.tbv?.reloadData()
}
}
task .resume()
}
}
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