IOS第四天-新浪微博 -存储优化OAuth受权帐号信息，下拉刷新，字典转模型

*************application

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // 1.建立窗口
    self.window = [[UIWindow alloc] init];
    self.window.frame = [UIScreen mainScreen].bounds;
    
    // 2.设置根控制器
    HWAccount *account = [HWAccountTool account];
    if (account) { // 以前已经登陆成功过
        [self.window switchRootViewController];
    } else {
        self.window.rootViewController = [[HWOAuthViewController alloc] init];   //受权登录的界面
    }
    
    // 3.显示窗口
    [self.window makeKeyAndVisible];
    return YES;
}

*************存储帐号的信息HWAccountTool.m

// 帐号的存储路径
#define HWAccountPath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"account.archive"]

#import "HWAccountTool.h"
#import "HWAccount.h"

@implementation HWAccountTool

/**
 *  存储帐号信息
 *
 *  @param account 帐号模型
 */
+ (void)saveAccount:(HWAccount *)account
{
    // 得到帐号存储的时间（accessToken的产生时间）
    account.created_time = [NSDate date];
    
    // 自定义对象的存储必须用NSKeyedArchiver，再也不有什么writeToFile方法
    [NSKeyedArchiver archiveRootObject:account toFile:HWAccountPath];
}


/**
 *  返回帐号信息
 *
 *  @return 帐号模型（若是帐号过时，返回nil）
 */
+ (HWAccount *)account
{
    // 加载模型
    HWAccount *account = [NSKeyedUnarchiver unarchiveObjectWithFile:HWAccountPath];
    
    /* 验证帐号是否过时 */
    
    // 过时的秒数
    long long expires_in = [account.expires_in longLongValue];
    // 得到过时时间
    NSDate *expiresTime = [account.created_time dateByAddingTimeInterval:expires_in];
    // 得到当前时间
    NSDate *now = [NSDate date];
    
    // 若是expiresTime <= now，过时
    /**
     NSOrderedAscending = -1L, 升序，右边 > 左边
     NSOrderedSame, 同样
     NSOrderedDescending 降序，右边 < 左边
     */
    NSComparisonResult result = [expiresTime compare:now];
    if (result != NSOrderedDescending) { // 过时
        return nil;
    }
    
    return account;
}
@end

*******HWAccount.m

#import "HWAccount.h"

@implementation HWAccount
+ (instancetype)accountWithDict:(NSDictionary *)dict
{
    HWAccount *account = [[self alloc] init];
    account.access_token = dict[@"access_token"];
    account.uid = dict[@"uid"];
    account.expires_in = dict[@"expires_in"];
    return account;
}

/**
 *  当一个对象要归档进沙盒中时，就会调用这个方法
 *  目的：在这个方法中说明这个对象的哪些属性要存进沙盒
 */
- (void)encodeWithCoder:(NSCoder *)encoder
{
    [encoder encodeObject:self.access_token forKey:@"access_token"];
    [encoder encodeObject:self.expires_in forKey:@"expires_in"];
    [encoder encodeObject:self.uid forKey:@"uid"];
    [encoder encodeObject:self.created_time forKey:@"created_time"];
}

/**
 *  当从沙盒中解档一个对象时（从沙盒中加载一个对象时），就会调用这个方法
 *  目的：在这个方法中说明沙盒中的属性该怎么解析（须要取出哪些属性）
 */
- (id)initWithCoder:(NSCoder *)decoder
{
    if (self = [super init]) {
        self.access_token = [decoder decodeObjectForKey:@"access_token"];
        self.expires_in = [decoder decodeObjectForKey:@"expires_in"];
        self.uid = [decoder decodeObjectForKey:@"uid"];
        self.created_time = [decoder decodeObjectForKey:@"created_time"];
    }
    return self;
}
@end

*********HWAccount.h

#import <Foundation/Foundation.h>

@interface HWAccount : NSObject <NSCoding>
/**　string    用于调用access_token，接口获取受权后的access token。*/
@property (nonatomic, copy) NSString *access_token;

/**　string    access_token的生命周期，单位是秒数。*/
@property (nonatomic, copy) NSNumber *expires_in;

/**　string    当前受权用户的UID。*/
@property (nonatomic, copy) NSString *uid;

/**    access token的建立时间 */
@property (nonatomic, strong) NSDate *created_time;

+ (instancetype)accountWithDict:(NSDictionary *)dict;
@end

 **********HWOAuthViewController.m

#import "HWOAuthViewController.h"
#import "AFNetworking.h"
#import "HWAccount.h"
#import "HWAccountTool.h"
#import "MBProgressHUD+MJ.h"

@interface HWOAuthViewController () <UIWebViewDelegate>

@end

@implementation HWOAuthViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 1.建立一个webView
    UIWebView *webView = [[UIWebView alloc] init];
    webView.frame = self.view.bounds;
    webView.delegate = self;
    [self.view addSubview:webView];
    
    // 2.用webView加载登陆页面（新浪提供的）
    // 请求地址：https://api.weibo.com/oauth2/authorize
    /* 请求参数：
     client_id    true    string    申请应用时分配的AppKey。
     redirect_uri    true    string    受权回调地址，站外应用需与设置的回调地址一致，站内应用需填写canvas page的地址。
    */
    NSURL *url = [NSURL URLWithString:@"https://api.weibo.com/oauth2/authorize?client_id=3235932662&redirect_uri=http://www.baidu.com"];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [webView loadRequest:request];
}

#pragma mark - webView代理方法
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    [MBProgressHUD hideHUD];
}

- (void)webViewDidStartLoad:(UIWebView *)webView
{
    [MBProgressHUD showMessage:@"正在加载..."];
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
    [MBProgressHUD hideHUD];
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    // 1.得到url
    NSString *url = request.URL.absoluteString;
    
    // 2.判断是否为回调地址
    NSRange range = [url rangeOfString:@"code="];
    if (range.length != 0) { // 是回调地址
        // 截取code=后面的参数值
        int fromIndex = range.location + range.length;
        NSString *code = [url substringFromIndex:fromIndex];
        
        // 利用code换取一个accessToken
        [self accessTokenWithCode:code];
        
        // 禁止加载回调地址
        return NO;
    }
    
    return YES;
}

/**
 *  利用code（受权成功后的request token）换取一个accessToken
 *
 *  @param code 受权成功后的request token
 */
- (void)accessTokenWithCode:(NSString *)code
{
/*
 URL：https://api.weibo.com/oauth2/access_token
 
 请求参数：
 client_id：申请应用时分配的AppKey
 client_secret：申请应用时分配的AppSecret
 grant_type：使用authorization_code
 redirect_uri：受权成功后的回调地址
 code：受权成功后返回的code
 */
    // 1.请求管理者
    AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
//    mgr.responseSerializer = [AFJSONResponseSerializer serializer];
    // AFN的AFJSONResponseSerializer默认不接受text/plain这种类型
    
    // 2.拼接请求参数
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"client_id"] = @"3235932662";
    params[@"client_secret"] = @"227141af66d895d0dd8baca62f73b700";
    params[@"grant_type"] = @"authorization_code";
    params[@"redirect_uri"] = @"http://www.baidu.com";
    params[@"code"] = code;
    
    // 3.发送请求
    [mgr POST:@"https://api.weibo.com/oauth2/access_token" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        [MBProgressHUD hideHUD];
        
        // 将返回的帐号字典数据 --> 模型，存进沙盒
        HWAccount *account = [HWAccount accountWithDict:responseObject];
        // 存储帐号信息
        [HWAccountTool saveAccount:account];
        
        // 切换窗口的根控制器
        UIWindow *window = [UIApplication sharedApplication].keyWindow;
        [window switchRootViewController];
        
        // UIWindow的分类、HWWindowTool
        // UIViewController的分类、HWControllerTool
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        [MBProgressHUD hideHUD];
        HWLog(@"请求失败-%@", error);
    }];
}
@end

UIWindow+Extension.m

#import "UIWindow+Extension.h"
#import "HWTabBarViewController.h"
#import "HWNewfeatureViewController.h"

@implementation UIWindow (Extension)
- (void)switchRootViewController
{
    NSString *key = @"CFBundleVersion";
    // 上一次的使用版本（存储在沙盒中的版本号）
    NSString *lastVersion = [[NSUserDefaults standardUserDefaults] objectForKey:key];
    // 当前软件的版本号（从Info.plist中得到）
    NSString *currentVersion = [NSBundle mainBundle].infoDictionary[key];
    
    if ([currentVersion isEqualToString:lastVersion]) { // 版本号相同：此次打开和上次打开的是同一个版本
        self.rootViewController = [[HWTabBarViewController alloc] init];
    } else { // 此次打开的版本和上一次不同，显示新特性
        self.rootViewController = [[HWNewfeatureViewController alloc] init];
        
        // 将当前的版本号存进沙盒
        [[NSUserDefaults standardUserDefaults] setObject:currentVersion forKey:key];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }
}
@end

 ************HWHomeViewController.m

#import "HWHomeViewController.h"
#import "HWDropdownMenu.h"
#import "HWTitleMenuViewController.h"
#import "AFNetworking.h"
#import "HWAccountTool.h"
#import "HWTitleButton.h"
#import "UIImageView+WebCache.h"
#import "HWUser.h"
#import "HWStatus.h"
#import "MJExtension.h" // 第三方的框架

@interface HWHomeViewController () <HWDropdownMenuDelegate>
/**
 *  微博数组（里面放的都是HWStatus模型，一个HWStatus对象就表明一条微博）
 */
@property (nonatomic, strong) NSMutableArray *statuses;
@end

@implementation HWHomeViewController

- (NSMutableArray *)statuses
{
    if (!_statuses) {
        self.statuses = [NSMutableArray array];
    }
    return _statuses;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 设置导航栏内容
    [self setupNav];
    
    // 得到用户信息（昵称）
    [self setupUserInfo];
    
    // 集成刷新控件
    [self setupRefresh];
}

/**
 * 3. 集成刷新控件
 */
- (void)setupRefresh
{
    UIRefreshControl *control = [[UIRefreshControl alloc] init];
    [control addTarget:self action:@selector(refreshStateChange:) forControlEvents:UIControlEventValueChanged];
    [self.tableView addSubview:control];
}

/**
 * 3-1 UIRefreshControl进入刷新状态：加载最新的数据
 */
- (void)refreshStateChange:(UIRefreshControl *)control
{
    // 1.请求管理者
    AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
    
    // 2.拼接请求参数
    HWAccount *account = [HWAccountTool account];
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"access_token"] = account.access_token;
    
    // 取出最前面的微博（最新的微博，ID最大的微博）
    HWStatus *firstStatus = [self.statuses firstObject];
    if (firstStatus) {
        // 若指定此参数，则返回ID比since_id大的微博（即比since_id时间晚的微博），默认为0
        params[@"since_id"] = firstStatus.idstr;
    }
    
    // 3.发送请求
    [mgr GET:@"https://api.weibo.com/2/statuses/friends_timeline.json" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        // 将 "微博字典"数组 转为 "微博模型"数组
        NSArray *newStatuses = [HWStatus objectArrayWithKeyValuesArray:responseObject[@"statuses"]]; //第三方的框架 // 将最新的微博数据，添加到总数组的最前面
        NSRange range = NSMakeRange(0, newStatuses.count);
        NSIndexSet *set = [NSIndexSet indexSetWithIndexesInRange:range];
        [self.statuses insertObjects:newStatuses atIndexes:set];
        
        // 刷新表格
        [self.tableView reloadData];
        
        // 结束刷新刷新
        [control endRefreshing];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        HWLog(@"请求失败-%@", error);
        
        // 结束刷新刷新
        [control endRefreshing];
    }];
}

/**
 * 2. 得到用户信息（昵称）
 */
- (void)setupUserInfo
{
    // 1.请求管理者
    AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
    
    // 2.拼接请求参数
    HWAccount *account = [HWAccountTool account];
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"access_token"] = account.access_token;
    params[@"uid"] = account.uid;
    
    // 3.发送请求
    [mgr GET:@"https://api.weibo.com/2/users/show.json" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        // 标题按钮
        UIButton *titleButton = (UIButton *)self.navigationItem.titleView;
        // 设置名字
        HWUser *user = [HWUser objectWithKeyValues:responseObject];
        [titleButton setTitle:user.name forState:UIControlStateNormal];
        
        // 存储昵称到沙盒中
        account.name = user.name;
        [HWAccountTool saveAccount:account];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        HWLog(@"请求失败-%@", error);
    }];
}

/**
 * 1. 设置导航栏内容
 */
- (void)setupNav
{
    /* 设置导航栏上面的内容 */
    self.navigationItem.leftBarButtonItem = [UIBarButtonItem itemWithTarget:self action:@selector(friendSearch) image:@"navigationbar_friendsearch" highImage:@"navigationbar_friendsearch_highlighted"];
    self.navigationItem.rightBarButtonItem = [UIBarButtonItem itemWithTarget:self action:@selector(pop) image:@"navigationbar_pop" highImage:@"navigationbar_pop_highlighted"];
    
    /* 中间的标题按钮 */ HWTitleButton *titleButton = [[HWTitleButton alloc] init];
    // 设置图片和文字
    NSString *name = [HWAccountTool account].name;
    [titleButton setTitle:name?name:@"首页" forState:UIControlStateNormal];
    // 监听标题点击
    [titleButton addTarget:self action:@selector(titleClick:) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.titleView = titleButton;
}

/**
 * 1-1 标题点击
 */
- (void)titleClick:(UIButton *)titleButton
{
    // 1.建立下拉菜单
    HWDropdownMenu *menu = [HWDropdownMenu menu];
    menu.delegate = self;
    
    // 2.设置内容
    HWTitleMenuViewController *vc = [[HWTitleMenuViewController alloc] init];
    vc.view.height = 150;
    vc.view.width = 150;
    menu.contentController = vc;
    
    // 3.显示
    [menu showFrom:titleButton];
}

- (void)friendSearch
{
    NSLog(@"friendSearch");
}

- (void)pop
{
    NSLog(@"pop");
}

#pragma mark - HWDropdownMenuDelegate
/**
 *  下拉菜单被销毁了
 */
- (void)dropdownMenuDidDismiss:(HWDropdownMenu *)menu
{
    UIButton *titleButton = (UIButton *)self.navigationItem.titleView;
    // 让箭头向下
    titleButton.selected = NO;
}

/**
 *  下拉菜单显示了
 */
- (void)dropdownMenuDidShow:(HWDropdownMenu *)menu
{
    UIButton *titleButton = (UIButton *)self.navigationItem.titleView;
    // 让箭头向上
    titleButton.selected = YES;
}

#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.statuses.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *ID = @"status";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
    }
    
    // 取出这行对应的微博字典
    HWStatus *status = self.statuses[indexPath.row];
    
    // 取出这条微博的做者（用户）
    HWUser *user = status.user;
    cell.textLabel.text = user.name;
    
    // 设置微博的文字
    cell.detailTextLabel.text = status.text;
    
    // 设置头像
    UIImage *placehoder = [UIImage imageNamed:@"avatar_default_small"];
    [cell.imageView sd_setImageWithURL:[NSURL URLWithString:user.profile_image_url] placeholderImage:placehoder];
    
    return cell;
}

/**
 1.将字典转为模型
 2.可以下拉刷新最新的微博数据
 3.可以上拉加载更多的微博数据
 */
@end

 ***HWTitleButton.h

#import "HWTitleButton.h"

@implementation HWTitleButton

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        self.titleLabel.font = [UIFont boldSystemFontOfSize:17];
        [self setImage:[UIImage imageNamed:@"navigationbar_arrow_down"] forState:UIControlStateNormal];
        [self setImage:[UIImage imageNamed:@"navigationbar_arrow_up"] forState:UIControlStateSelected];
    }
    return self;
}

- (void)layoutSubviews
{
    [super layoutSubviews];
    // 若是仅仅是调整按钮内部titleLabel和imageView的位置，那么在layoutSubviews中单独设置位置便可
    
    // 1.计算titleLabel的frame
    self.titleLabel.x = self.imageView.x;
    
    // 2.计算imageView的frame
    self.imageView.x = CGRectGetMaxX(self.titleLabel.frame);
}

- (void)setTitle:(NSString *)title forState:(UIControlState)state
{
    [super setTitle:title forState:state];

    // 只要修改了文字，就让按钮从新计算本身的尺寸
    [self sizeToFit];
}

- (void)setImage:(UIImage *)image forState:(UIControlState)state
{
    [super setImage:image forState:state];
    
    // 只要修改了图片，就让按钮从新计算本身的尺寸
    [self sizeToFit];
}
@end

#import <UIKit/UIKit.h>

@interface HWTitleButton : UIButton

@end

  HWStatus.h

#import <Foundation/Foundation.h>
@class HWUser;

@interface HWStatus : NSObject
/**    string    字符串型的微博ID*/
@property (nonatomic, copy) NSString *idstr;

/**    string    微博信息内容*/
@property (nonatomic, copy) NSString *text;

/**    object    微博做者的用户信息字段 详细*/
@property (nonatomic, strong) HWUser *user;
@end

 HWStatus.m

#import "HWStatus.h"

@implementation HWStatus
@end