#import <UIKit/UIKit.h>

 @interface ViewController : UITableViewController

 @property (copy, nonatomic) NSArray *arrSampleName;

 - (instancetype)initWithSampleNameArray:(NSArray *)arrSampleName;

 @end 

 #import "ViewController.h"

 #import "XMLRequestViewController.h"

 #import "JSONRequestViewController.h"

 @interface ViewController ()

 - (void)layoutUI;

 @end

 @implementation ViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

     [self layoutUI];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 - (instancetype)initWithSampleNameArray:(NSArray *)arrSampleName {

     if (self = [super initWithStyle:UITableViewStyleGrouped]) {

         self.navigationItem.title = @"使用 AFNetworking 进行数据请求";

         self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:nil action:nil];

         _arrSampleName = arrSampleName;

     }

     return self;

 }

 - (void)layoutUI {

 }

 #pragma mark - UITableViewController相关方法重写

 - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {

     return 0.1;

 }

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

     return ;

 }

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

     return [_arrSampleName count];

 }

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

     static NSString *cellIdentifier = @"cell";

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

     if (!cell) {

         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];

     }

     cell.textLabel.text = _arrSampleName[indexPath.row];

     return cell;

 }

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

     switch (indexPath.row) {

         case : {

             XMLRequestViewController *XMLRequestVC = [XMLRequestViewController new];

             [self.navigationController pushViewController:XMLRequestVC animated:YES];

             break;

         }

         case : {

             JSONRequestViewController *JSONRequestVC = [JSONRequestViewController new];

             [self.navigationController pushViewController:JSONRequestVC animated:YES];

             break;

             /*

              类似堆栈的先进后出的原理：

              返回到（上一级）、（任意级）、（根级）导航

              [self.navigationController popViewControllerAnimated:YES];

              [self.navigationController popToViewController:thirdSampleVC animated:YES];

              [self.navigationController popToRootViewControllerAnimated:YES];

              */

         }

         default:

             break;

     }

 }

 @end 

 #define kXMLRequestURLStr @"http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/getWeatherbyCityName?theCityName=59287"

 #define kJSONRequestURLStr @"https://alpha-api.app.net/stream/0/posts/stream/global"

 #define kTitleOfXMLRequest @"XML 数据请求"

 #define kTitleOfJSONRequest @"JSON 数据请求"

 #define kAvatarImageStr @"avatarImageStr"

 #define kName @"name"

 #define kText @"text"

 #define kLink @"link"

 #define kCreatedAt @"createdAt"

 #define kApplication [UIApplication sharedApplication] 

 #import <UIKit/UIKit.h>

 @interface UIButton (BeautifulButton)

 /**

  *  根据按钮文字颜色，返回对应文字颜色的圆角按钮

  *

  *  @param tintColor 按钮文字颜色；nil 的话就为深灰色

  */

 - (void)beautifulButton:(UIColor *)tintColor;

 @end 

 #import "UIButton+BeautifulButton.h"

 @implementation UIButton (BeautifulButton)

 - (void)beautifulButton:(UIColor *)tintColor {

     self.tintColor = tintColor ?: [UIColor darkGrayColor];

     self.layer.masksToBounds = YES;

     self.layer.cornerRadius = 10.0;

     self.layer.borderColor = [UIColor grayColor].CGColor;

     self.layer.borderWidth = 1.0;

 }

 @end 

 #import <UIKit/UIKit.h>

 @interface NSString (OpenURL)

 /**

  *  打开浏览器

  */

 - (void)openByBrowser;

 /**

  *  打开邮件

  */

 - (void)openByEmail;

 /**

  *  拨打电话

  */

 - (void)openByTelephone;

 /**

  *  打开短信（Short Messaging Service）

  */

 - (void)openBySMS;

 @end 

 #import "NSString+OpenURL.h"

 @implementation NSString (OpenURL)

 + (void)open:(NSString *)openURLStr {

     [[UIApplication sharedApplication] openURL:[NSURL URLWithString:openURLStr]];

 }

 - (void)openByBrowser {

     [NSString open:self];

 }

 - (void)openByEmail {

     [NSString open:[NSString stringWithFormat:@"mailto://%@", self]];

 }

 - (void)openByTelephone {

     [NSString open:[NSString stringWithFormat:@"tel://%@", self]];

 }

 - (void)openBySMS {

     [NSString open:[NSString stringWithFormat:@"sms://%@", self]];

 }

 @end 

 #import <UIKit/UIKit.h>

 @interface KMTableViewCell : UITableViewCell

 @property (strong, nonatomic) IBOutlet UIImageView *imgVAvatarImage;

 @property (strong, nonatomic) IBOutlet UILabel *lblName;

 @property (strong, nonatomic) IBOutlet UILabel *lblCreatedAt;

 @property (strong, nonatomic) IBOutlet UIImageView *imgVLink;

 @property (strong, nonatomic) UILabel *lblText;

 @property (copy, nonatomic) NSString *avatarImageStr;

 @property (copy, nonatomic) NSString *name;

 @property (copy, nonatomic) NSString *text;

 @property (copy, nonatomic) NSString *createdAt;

 @property (assign, nonatomic, getter=isHaveLink) BOOL haveLink;

 @end 

 #import "KMTableViewCell.h"

 //#import "UIImageView+AFNetworking.h"

 #import "UIImageView+WebCache.h"

 static UIImage *placeholderImage;

 static CGFloat widthOfLabel;

 @implementation KMTableViewCell

 - (void)awakeFromNib {

     // Initialization code

     static dispatch_once_t onceToken;

     dispatch_once(&onceToken, ^{

         placeholderImage = [UIImage imageNamed:@"JSON"];

         widthOfLabel = [[UIScreen mainScreen] bounds].size.width - 100.0;

     });

     _imgVAvatarImage.layer.masksToBounds = YES;

     _imgVAvatarImage.layer.cornerRadius = 10.0;

     //由于 xib 中对标签自适应宽度找不到合适的方式来控制，所以这里用代码编写；这里屏幕复用的 Cell 有几个，就会执行几次 awakeFromNib 方法

     _lblText = [[UILabel alloc] initWithFrame:CGRectMake(90.0, 23.0, widthOfLabel, 42.0)];

     _lblText.numberOfLines = ;

     _lblText.font = [UIFont systemFontOfSize:12.0];

     [self addSubview:_lblText];

 }

 - (void)setSelected:(BOOL)selected animated:(BOOL)animated {

     [super setSelected:selected animated:animated];

     // Configure the view for the selected state

 }

 - (void)setAvatarImageStr:(NSString *)avatarImageStr {

     if (![_avatarImageStr isEqualToString:avatarImageStr]) {

         _avatarImageStr = [avatarImageStr copy];

         NSURL *avatarImageURL = [NSURL URLWithString:_avatarImageStr];

         //NSData *avatarImageData = [NSData dataWithContentsOfURL:avatarImageURL];

         //_imgVAvatarImage.image = [UIImage imageWithData:avatarImageData];

         //图片缓存；性能优化的第一步

         //方法一：AFNetworking 框架：UIImageView+AFNetworking

 //        [_imgVAvatarImage setImageWithURL:avatarImageURL

 //                         placeholderImage:placeholderImage];

         //方法二：SDWebImage 框架：UIImageView+WebCache

         [_imgVAvatarImage sd_setImageWithURL:avatarImageURL

                             placeholderImage:placeholderImage];

     }

 }

 - (void)setName:(NSString *)name {

     _name = [name copy];

     _lblName.text = _name;

 }

 - (void)setText:(NSString *)text {

     _text = [text copy];

     _lblText.text = _text;

 }

 - (void)setCreatedAt:(NSString *)createdAt {

     _createdAt = [createdAt copy];

     _lblCreatedAt.text = _createdAt;

 }

 - (void)setHaveLink:(BOOL)haveLink {

     _haveLink = haveLink;

     _imgVLink.hidden = !_haveLink;

 }

 @end 

 #import <UIKit/UIKit.h>

 @interface XMLRequestViewController : UIViewController <NSXMLParserDelegate>

 @property (strong, nonatomic) UITextView *txtVResult;

 @property (strong, nonatomic) IBOutlet UIButton *btnSendRequest;

 @end 

 #import "XMLRequestViewController.h"

 #import "AFNetworking.h"

 #import "AFNetworkActivityIndicatorManager.h"

 #import "UIButton+BeautifulButton.h"

 #import "XMLDictionary.h"

 @interface XMLRequestViewController ()

 - (void)layoutUI;

 - (void)convertXMLParserToDictionary:(NSXMLParser *)parser;

 @end

 @implementation XMLRequestViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

     [self layoutUI];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 - (void)layoutUI {

     self.navigationItem.title = kTitleOfXMLRequest;

     [_btnSendRequest beautifulButton:nil];

     _txtVResult = [UITextView new];

     _txtVResult.editable = NO;

     CGRect rect = [[UIScreen mainScreen] bounds];

     _txtVResult.frame = CGRectMake(5.0, 64.0, rect.size.width - 10.0, rect.size.height - 164.0);

     _txtVResult.font = [UIFont systemFontOfSize:15.0];

     _txtVResult.text = @"点击「发送请求」按钮获取天气信息";

     [self.view addSubview:_txtVResult];

     //启动网络活动指示器；会根据网络交互情况，实时显示或隐藏网络活动指示器；他通过「通知与消息机制」来实现 [UIApplication sharedApplication].networkActivityIndicatorVisible 的控制

     [AFNetworkActivityIndicatorManager sharedManager].enabled = YES;

 }

 - (void)convertXMLParserToDictionary:(NSXMLParser *)parser {

     //dictionaryWithXMLParser: 是第三方框架 XMLDictionary 的方法

     NSDictionary *dic = [NSDictionary dictionaryWithXMLParser:parser];

     NSMutableString *mStrWeatherInfo = [[NSMutableString alloc] initWithString:@"广州近三天天气情况：\n"];

     NSArray *arrWeatherInfo = [dic objectForKey:@"string"];

     if (arrWeatherInfo != nil && arrWeatherInfo.count > ) {

         NSMutableArray *mArrRange = [[NSMutableArray alloc] init];

         NSUInteger loc = mStrWeatherInfo.length;

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         NSUInteger len = mStrWeatherInfo.length - loc;

         NSValue *valObj = [NSValue valueWithRange:NSMakeRange(loc, len)];

         [mArrRange addObject:valObj];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         loc = mStrWeatherInfo.length;

         [mStrWeatherInfo appendFormat:@"\n\n %@", arrWeatherInfo[]];

         len = mStrWeatherInfo.length - loc;

         valObj = [NSValue valueWithRange:NSMakeRange(loc, len)];

         [mArrRange addObject:valObj];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         loc = mStrWeatherInfo.length;

         [mStrWeatherInfo appendFormat:@"\n\n %@", arrWeatherInfo[]];

         len = mStrWeatherInfo.length - loc;

         valObj = [NSValue valueWithRange:NSMakeRange(loc, len)];

         [mArrRange addObject:valObj];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         [mStrWeatherInfo appendFormat:@"\n %@", arrWeatherInfo[]];

         [mStrWeatherInfo appendFormat:@"\n\n %@", arrWeatherInfo[]];

         //数据的前10个字符以16.0像素加粗显示；这里使用 UITextView 的 attributedText，而他的 text 无法实现这种需求

         NSMutableAttributedString *mAttrStr = [[NSMutableAttributedString alloc] initWithString:mStrWeatherInfo];

         [mAttrStr addAttribute:NSFontAttributeName

                          value:[UIFont boldSystemFontOfSize:16.0]

                          range:NSMakeRange(, )];

         //数据的日期部分以紫色显示

         for (NSValue *valObj in mArrRange) {

             NSRange currentRange;

             [valObj getValue:&currentRange];

             [mAttrStr addAttribute:NSForegroundColorAttributeName

                              value:[UIColor purpleColor]

                              range:currentRange];

         }

         //数据的前10个字符之后的内容全部以15.0像素显示

         [mAttrStr addAttribute:NSFontAttributeName

                          value:[UIFont systemFontOfSize:15.0]

                          range:NSMakeRange(, mStrWeatherInfo.length - )];

         _txtVResult.attributedText = mAttrStr;

     } else {

         _txtVResult.text = @"请求数据无效";

     }

 }

 - (IBAction)sendRequest:(id)sender {

     NSURL *requestURL = [NSURL URLWithString:kXMLRequestURLStr];

     NSURLRequest *request = [NSURLRequest requestWithURL:requestURL];

     AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];

     op.responseSerializer = [AFXMLParserResponseSerializer serializer];

     [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

         NSLog(@"JSON: %@", responseObject);

         NSXMLParser *parser = (NSXMLParser *)responseObject;

         //这里使用了第三方框架 XMLDictionary，他本身继承并实现 NSXMLParserDelegate 委托代理协议，对数据进行遍历处理

         [self convertXMLParserToDictionary:parser];

         //parser.delegate = self;

         //parser.shouldProcessNamespaces = YES;

         //[parser parse];

     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

         NSLog(@"Error: %@", error);

     }];

     //start 是 AFNetworking 的自定义方法，他在自定义的线程中去执行操作；不是 NSOperation 对象实例的 start 方法，所以可以不用使用把操作添加到操作主队列的方法：[[NSOperationQueue mainQueue] addOperation:op]

     [op start];

 }

 #pragma mark -

 #pragma mark NSXMLParserDelegate

 /* 开始解析 XML 文件，在开始解析 XML 节点前，通过该方法可以做一些初始化工作 */

 - (void)parserDidStartDocument:(NSXMLParser *)parser {

     NSLog(@"开始解析 XML 文件");

 }

 /* 当解析器对象遇到 XML 的开始标记时，调用这个方法开始解析该节点 */

 - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

     attributes:(NSDictionary *)attributeDict {

     NSLog(@"发现节点：%@", elementName);

 }

 /* 当解析器找到开始标记和结束标记之间的字符时，调用这个方法解析当前节点的所有字符 */

 - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {

     NSLog(@"正在解析节点内容：%@", string);

 }

 /* 当解析器对象遇到 XML 的结束标记时，调用这个方法完成解析该节点 */

 - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

     NSLog(@"解析节点结束：%@", elementName);

 }

 /* 解析 XML 出错的处理方法 */

 - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {

     NSLog(@"解析 XML 出错：%@", parseError);

 }

 /* 解析 XML 文件结束 */

 - (void)parserDidEndDocument:(NSXMLParser *)parser {

     NSLog(@"解析 XML 文件结束");

 }

 @end 

 #import <UIKit/UIKit.h>

 @interface JSONRequestViewController : UIViewController <UITableViewDataSource, UITableViewDelegate, UIWebViewDelegate>

 @property (strong, nonatomic) NSMutableArray *mArrCell;

 @property (strong, nonatomic) UITableView *tableView;

 @property (strong, nonatomic) UILabel *lblEmptyDataMsg;

 @property (strong, nonatomic) UIWebView *webView;

 @property (strong, nonatomic) IBOutlet UIButton *btnSendRequest;

 @end 

 #import "JSONRequestViewController.h"

 #import "AFNetworking.h"

 #import "AFNetworkActivityIndicatorManager.h"

 #import "UIButton+BeautifulButton.h"

 #import "KMTableViewCell.h"

 #import "NSString+OpenURL.h"

 static NSString *cellIdentifier = @"cellIdentifier";

 @interface JSONRequestViewController ()

 - (void)layoutUI;

 - (NSString *)displayTimeFromCreatedAt:(NSString *)createdAt;

 - (void)loadData:(NSArray *)arrData;

 @end

 @implementation JSONRequestViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

     [self layoutUI];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 - (void)layoutUI {

     self.navigationItem.title = kTitleOfJSONRequest;

     [_btnSendRequest beautifulButton:nil];

     _mArrCell = [[NSMutableArray alloc] initWithCapacity:];

     CGRect rect = [[UIScreen mainScreen] bounds];

     CGRect frame = CGRectMake(5.0, 64.0, rect.size.width - 10.0, rect.size.height - 164.0);

     _tableView =[[UITableView alloc] initWithFrame:frame style:UITableViewStylePlain];

     _tableView.dataSource = self;

     _tableView.delegate = self;

     //设置边距，解决单元格分割线默认偏移像素过多的问题

     if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) {

         [_tableView setSeparatorInset:UIEdgeInsetsZero]; //设置单元格（上左下右）内边距

     }

     if ([_tableView respondsToSelector:@selector(setLayoutMargins:)]) {

         [_tableView setLayoutMargins:UIEdgeInsetsZero]; //设置单元格（上左下右）外边距

     }

     [self.view addSubview:_tableView];

     //注册可复用的单元格

     UINib *nib = [UINib nibWithNibName:@"KMTableViewCell" bundle:nil];

     [_tableView registerNib:nib forCellReuseIdentifier:cellIdentifier];

     //空数据时，显示的提示内容

     _lblEmptyDataMsg = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 300.0, 50.0)];

     CGPoint newPoint = _tableView.center;

     newPoint.y -= 45.0;

     _lblEmptyDataMsg.center = newPoint;

     _lblEmptyDataMsg.text = @"点击「发送请求」按钮获取全球新闻信息";

     _lblEmptyDataMsg.textColor = [UIColor grayColor];

     _lblEmptyDataMsg.textAlignment = NSTextAlignmentCenter;

     _lblEmptyDataMsg.font = [UIFont systemFontOfSize:16.0];

     [_tableView addSubview:_lblEmptyDataMsg];

     //点击单元格时，显示的新闻信息详细内容

     frame = CGRectMake(10.0, CGRectGetMidY(rect) - 200.0, rect.size.width - 20.0, 400.0);

     _webView = [[UIWebView alloc] initWithFrame:frame];

     _webView.layer.borderColor = [UIColor lightGrayColor].CGColor;

     _webView.layer.borderWidth = 1.0;

     _webView.delegate = self;

     _webView.hidden = YES;

     [self.view addSubview:_webView];

     [AFNetworkActivityIndicatorManager sharedManager].enabled = YES;

 }

 - (NSString *)displayTimeFromCreatedAt:(NSString *)createdAt {

     NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];

     [dateFormat setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss'Z'"]; //「2015-09-15T13:23:28Z」

     NSDate *date = [dateFormat dateFromString:createdAt];

     NSTimeZone *zone = [NSTimeZone systemTimeZone];

     NSInteger interval = [zone secondsFromGMTForDate:date]; //跟 GMT 时间相差8小时

     date = [date dateByAddingTimeInterval:interval];

     [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; //转化为「2015-09-15 21:23:28」

     NSString *displayTime = [dateFormat stringFromDate:date];

     return displayTime;

 }

 - (void)loadData:(NSArray *)arrData {

     _mArrCell = [NSMutableArray new];

     [arrData enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

         NSMutableDictionary *mDicCell = [NSMutableDictionary new];

         NSDictionary *dicRoot = (NSDictionary *)obj;

         NSArray *arrLink = [dicRoot valueForKeyPath:@"entities.links"];

         [mDicCell setValue:[NSString stringWithFormat:@"%@?w=80&h=80",

                            [dicRoot valueForKeyPath:@"user.avatar_image.url"]]

                    forKey:kAvatarImageStr];

         [mDicCell setValue:[dicRoot valueForKeyPath:@"user.name"] forKey:kName];

         [mDicCell setValue:[dicRoot valueForKey:@"text"] forKey:kText];

         [mDicCell setValue:(arrLink.count >  ? [arrLink[] valueForKey:@"url"] : @"")

                     forKey:kLink];

         [mDicCell setValue:[self displayTimeFromCreatedAt:[dicRoot valueForKey:@"created_at"]]

                     forKey:kCreatedAt];

         [_mArrCell addObject:mDicCell];

     }];

     [self.tableView reloadData];

 }

 - (IBAction)sendRequest:(id)sender {

     _lblEmptyDataMsg.text = @"加载中...";

     _webView.hidden = YES;

     //方法一：AFHTTPRequestOperation

 //    NSURL *requestURL = [NSURL URLWithString:kJSONRequestURLStr];

 //    NSURLRequest *request = [NSURLRequest requestWithURL:requestURL];

 //    AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];

 //    op.responseSerializer = [AFJSONResponseSerializer serializer];

 //    [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

 //        NSDictionary *dic = (NSDictionary *)responseObject;

 //        [self loadData:(NSArray *)dic[@"data"]];

 //    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

 //        NSLog(@"Error: %@", error);

 //    }];

 //    //start 是 AFNetworking 的自定义方法，他在自定义的线程中去执行操作；不是 NSOperation 对象实例的 start 方法，所以可以不用使用把操作添加到操作主队列的方法：[[NSOperationQueue mainQueue] addOperation:op]

 //    [op start];

     //方法二：AFHTTPRequestOperationManager

     AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

     [manager GET:kJSONRequestURLStr parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {

         NSDictionary *dic = (NSDictionary *)responseObject;

         [self loadData:(NSArray *)dic[@"data"]];

     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

         NSLog(@"Error: %@", error);

     }];

 }

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

     _webView.hidden = YES;

 }

 #pragma mark - TableView

 - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {

     return @"全球新闻信息列表";

 }

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

     return ;

 }

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

     NSUInteger count = _mArrCell.count;

     _lblEmptyDataMsg.hidden = count > ;

     return count;

 }

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

     KMTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

     if (!cell) {

         cell = [[KMTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault

                                       reuseIdentifier:cellIdentifier];

     }

     NSMutableDictionary *mDicCell = _mArrCell[indexPath.row];

     cell.avatarImageStr = mDicCell[kAvatarImageStr];

     cell.name = mDicCell[kName];

     cell.text = mDicCell[kText];

     cell.createdAt = mDicCell[kCreatedAt];

     cell.haveLink = [mDicCell[kLink] length] > ; //可以通过 isHaveLink 或 haveLink 获取值

     return cell;

 }

 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

     return 90.0;

 }

 - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

     /*

      viewDidLoad 中对应的操作

     if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) {

         [_tableView setSeparatorInset:UIEdgeInsetsZero]; //设置单元格（上左下右）内边距

     }

     if ([_tableView respondsToSelector:@selector(setLayoutMargins:)]) {

         [_tableView setLayoutMargins:UIEdgeInsetsZero]; //设置单元格（上左下右）外边距

     }

      */

     if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {

         [cell setSeparatorInset:UIEdgeInsetsZero];

     }

     if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {

         [cell setLayoutMargins:UIEdgeInsetsZero];

     }

 }

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

     NSMutableDictionary *mDicCell = _mArrCell[indexPath.row];

     NSString *link = mDicCell[kLink];

     if (link.length > ) {

         //使用浏览器打开网址

         //[link openByBrowser];

         //使用 WebView 打开网址；由于这里很多网址是外国的，存在有的访问不了、有的访问慢导致加载超时的情况

         NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:link]];

         [_webView loadRequest:request];

         _webView.hidden = NO;

     }

 }

 #pragma mark - WebView

 - (void)webViewDidStartLoad:(UIWebView *)webView {

     kApplication.networkActivityIndicatorVisible = YES;

 }

 - (void)webViewDidFinishLoad:(UIWebView *)webView {

     kApplication.networkActivityIndicatorVisible = NO;

 }

 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {

     NSLog(@"Error: %@", error);

     webView.hidden = YES;

     kApplication.networkActivityIndicatorVisible = NO;

     UIAlertView *alertVCustom = [[UIAlertView alloc] initWithTitle:@"提示信息"

                                                            message:@"网络连接错误"

                                                           delegate:nil

                                                  cancelButtonTitle:@"确定"

                                                  otherButtonTitles:nil, nil];

     [alertVCustom show];

 }

 @end

 #import <UIKit/UIKit.h>

 @interface AppDelegate : UIResponder <UIApplicationDelegate>

 @property (strong, nonatomic) UIWindow *window;

 @property (strong, nonatomic) UINavigationController *navigationController;

 @end 

 #import "AppDelegate.h"

 #import "ViewController.h"

 @interface AppDelegate ()

 @end

 @implementation AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

     ViewController *viewController = [[ViewController alloc]

                                       initWithSampleNameArray:@[ kTitleOfXMLRequest,

                                                                  kTitleOfJSONRequest ]];

     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];

     _window.rootViewController = _navigationController;

     //[_window addSubview:_navigationController.view]; //当_window.rootViewController关联时，这一句可有可无

     [_window makeKeyAndVisible];

     return YES;

 }

 - (void)applicationWillResignActive:(UIApplication *)application {

 }

 - (void)applicationDidEnterBackground:(UIApplication *)application {

 }

 - (void)applicationWillEnterForeground:(UIApplication *)application {

 }

 - (void)applicationDidBecomeActive:(UIApplication *)application {

 }

 - (void)applicationWillTerminate:(UIApplication *)application {

 }

 @end