iOS开发项目篇—30下拉刷新

浏览数：21 / 时间：2015年06月11日

iOS开发项目篇—30下拉刷新

一、网络监控

当应用所处的网络环境不好的时候，获取不到相应的网络数据，考虑到用户对应用的使用体验，有必要对网络的状况进行监听。

在程序启动完的时候，监控网络

YYAppDelegate.m文件代码：

 1 //
 2 //  YYAppDelegate.m
 3 //
 4 
 5 #import "YYAppDelegate.h"
 6 #import "YYOAuthViewController.h"
 7 #import "YYControllerTool.h"
 8 #import "YYAccountTool.h"
 9 #import "YYAccountModel.h"
10 #import "SDWebImageManager.h"
11 #import "SDImageCache.h"
12 #import "AFNetworking.h"
13 #import "MBProgressHUD+MJ.h"
14 
15 
16 @implementation YYAppDelegate
17 
18 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
19 {
20  
21    //1.创建窗口
22     self.window=[[UIWindow alloc]init];
23     self.window.frame=[UIScreen mainScreen].bounds;
24     
25     
26     //2.显示窗口(主窗口)
27     [self.window makeKeyAndVisible];
28     
29     //3.设置窗口的根控制器
30     YYAccountModel *account=[YYAccountTool accountModel];
31     
32     if (account) {  //  存在成功授权的账号信息
33         [YYControllerTool chooseRootViewController];
34     }else  //没有登陆过
35     {
36         self.window.rootViewController=[[YYOAuthViewController alloc]init];
37     }
38     
39     //4.监控网络状态
40     AFNetworkReachabilityManager *mgr=[AFNetworkReachabilityManager sharedManager];
41     //当网络状态改变的时候，就会调用
42     [mgr setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
43         switch (status) {
44             case AFNetworkReachabilityStatusUnknown://未知网络
45             case AFNetworkReachabilityStatusNotReachable://没有网络
46                 YYLog(@"没有网络（断网）");
47                 [MBProgressHUD showError:@"网络异常，请检查网络设置！"];
48                 break;
49             case AFNetworkReachabilityStatusReachableViaWWAN://手机自带网络
50                 YYLog(@"手机自带网络");
51                 break;
52             case AFNetworkReachabilityStatusReachableViaWiFi://WIFI
53                 YYLog(@"WIFI");
54                 break;
55         }
56     }];
57     //开始监控
58     [mgr startMonitoring];
59     return YES;
60 }
61 
62 
63 - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application
64 {
65     // 赶紧清除所有的内存缓存
66     [[SDImageCache sharedImageCache] clearMemory];
67     
68     // 赶紧停止正在进行的图片下载操作
69     [[SDWebImageManager sharedManager] cancelAll];
70 }

二、下拉刷新数据的简单说明

代码：

YYHomeTableViewController.m文件

  1 //
  2 //  YYHomeTableViewController.m
  3 //
  4 
  5 #import "YYHomeTableViewController.h"
  6 #import "YYOneViewController.h"
  7 #import "YYTitleButton.h"
  8 #import "YYPopMenu.h"
  9 #import "YYAccountModel.h"
 10 #import "YYAccountTool.h"
 11 #import "AFNetworking.h"
 12 #import "UIImageView+WebCache.h"
 13 #import "YYUserModel.h"
 14 #import "YYStatusModel.h"
 15 #import "MJExtension.h"
 16 
 17 @interface YYHomeTableViewController ()<YYPopMenuDelegate>
 18 @property(nonatomic,assign)BOOL down;
 19 @property(nonatomic,strong)NSArray *statuses;
 20 @end
 21 
 22 @implementation YYHomeTableViewController
 23 
 24 - (void)viewDidLoad
 25 {
 26     [super viewDidLoad];
 27     
 28     //设置导航栏内容
 29     [self setupNavBar];
 30     
 31     //加载最新数据
 32     [self loadNewStatus];
 33     
 34     //集成刷新控件
 35     [self setupRefresh];
 36 }
 37 
 38 //集成刷新控件
 39 -(void)setupRefresh
 40 {
 41     // 1.添加下拉刷新控件
 42     UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
 43     [self.tableView addSubview:refreshControl];
 44     
 45     [self loadNewStatus];
 46 }
 47 
 48 /**加载最新微博数据*/
 49 -(void)loadNewStatus
 50 {
 51     //1.获得请求管理者
 52     AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
 53     
 54     //2.封装请求参数
 55     
 56     NSMutableDictionary *params=[NSMutableDictionary dictionary];
 57     params[@"access_token"] =[YYAccountTool accountModel].access_token;
 58     //设置请求返回3天数据
 59     params[@"count"]=@12;
 60  
 61     
 62     //3.发送Post请求
 63    // url：https://api.weibo.com/2/statuses/home_timeline.json
 64     [mgr GET:@"https://api.weibo.com/2/statuses/home_timeline.json" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary*accountDict) {
 65 
 66         self.statuses=accountDict[@"statuses"];
 67         
 68         // 微博字典 -- 数组
 69         NSArray *statusDictArray = accountDict[@"statuses"];
 70         
 71         //微博字典数组---》微博模型数组
 72         self.statuses=[YYStatusModel objectArrayWithKeyValuesArray:statusDictArray];
 73         
 74         //重新刷新表格
 75         [self.tableView reloadData];
 76     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
 77         YYLog(@"请求失败");
 78     }];
 79     
 80 }
 81 /**设置导航栏内容*/
 82 -(void)setupNavBar
 83 {
 84     self.navigationItem.leftBarButtonItem=[UIBarButtonItem itemWithImageName:@"navigationbar_friendsearch" highImageName:@"navigationbar_friendsearch_highlighted" target:self action:@selector(friendsearch)];
 85     self.navigationItem.rightBarButtonItem=[UIBarButtonItem itemWithImageName:@"navigationbar_pop" highImageName:@"navigationbar_pop_highlighted" target:self action:@selector(pop)];
 86     
 87     //设置导航栏按钮
 88     YYTitleButton *titleButton=[[YYTitleButton alloc]init];
 89     //设置文字
 90     [titleButton setTitle:@"首页" forState:UIControlStateNormal];
 91     //设置图标
 92     [titleButton setImage:[UIImage imageWithName:@"navigationbar_arrow_down"] forState:UIControlStateNormal];
 93     //设置背景
 94     [titleButton setBackgroundImage:[UIImage resizedImage:@"navigationbar_filter_background_highlighted"] forState:UIControlStateHighlighted];
 95     
 96     //设置尺寸
 97     titleButton.width=100;
 98     titleButton.height=35;
 99     //监听按钮的点击事件
100     [titleButton addTarget:self action:@selector(titleButtonClick:) forControlEvents:UIControlEventTouchUpInside];
101     self.navigationItem.titleView=titleButton;
102 }
103 -(void)titleButtonClick:(UIButton *)titleButton
104 {
105 
106         [titleButton setImage:[UIImage imageWithName:@"navigationbar_arrow_up"] forState:UIControlStateNormal];
107         
108         UITableView *tableView=[[UITableView alloc]init];
109         [tableView setBackgroundColor:[UIColor yellowColor]];
110         YYPopMenu *menu=[YYPopMenu popMenuWithContentView:tableView];
111         [menu showInRect:CGRectMake(60, 55, 200, 200)];
112         menu.dimBackground=YES;
113 
114     menu.arrowPosition=YYPopMenuArrowPositionRight;
115         menu.delegate=self;
116 }
117 
118 
119 #pragma mark-YYPopMenuDelegate
120 //弹出菜单
121 -(void)popMenuDidDismissed:(YYPopMenu *)popMenu
122 {
123     YYTitleButton *titleButton=(YYTitleButton *)self.navigationItem.titleView;
124     [titleButton setImage:[UIImage imageWithName:@"navigationbar_arrow_down"] forState:UIControlStateNormal];
125 }
126 -(void)pop
127 {
128     YYLog(@"---POP---");
129 }
130 -(void)friendsearch
131 {
132     //跳转到one这个子控制器界面
133     YYOneViewController *one=[[YYOneViewController alloc]init];
134     one.title=@"One";
135     //拿到当前控制器
136     [self.navigationController pushViewController:one animated:YES];
137     
138 }
139 
140 #pragma mark - Table view data source
141 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
142 {
143     return self.statuses.count;
144 }
145 
146 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
147 {
148     static NSString *ID = @"cell";
149     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
150     if (!cell) {
151         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
152     }
153     
154       //取出这行对应的微博字典数据,转换为数据模型
155     YYStatusModel *status=self.statuses[indexPath.row];
156     cell.textLabel.text=status.text;
157     cell.detailTextLabel.text=status.user.name;
158     NSString *imageUrlStr=status.user.profile_image_url;
159     [cell.imageView setImageWithURL:[NSURL URLWithString:imageUrlStr] placeholderImage:[UIImage imageWithName:@"avatar_default_small"]];
160     
161     return cell;
162 }
163 
164 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
165 {
166     //点击cell的时候，跳到下一个界面
167     UIViewController *newVc = [[UIViewController alloc] init];
168     newVc.view.backgroundColor = [UIColor redColor];
169     newVc.title = @"新控制器";
170     [self.navigationController pushViewController:newVc animated:YES];
171 }
172 
173 @end