IOS第四天-新浪微博 -存储优化OAuth授权账号信息，下拉刷新，字典转模型

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

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// 1.创建窗口
self.window = [[UIWindow alloc] init];
self.window.frame = [UIScreen mainScreen].bounds;

// 2.设置根控制器
HWAccount *account = [HWAccountTool account];
if (account) { // 之前已经登录成功过
[self.window switchRootViewController];
} else {
self.window.rootViewController = [[HWOAuthViewController alloc] init];   //授权登陆的界面
}

// 3.显示窗口
[self.window makeKeyAndVisible];
return YES;
}

*************存储账号的信息HWAccountTool.m

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

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

@implementation HWAccountTool

/**
*  存储账号信息
*
*  @param account 账号模型
*/
+ (void)saveAccount:(HWAccount *)account
{
// 获得账号存储的时间（accessToken的产生时间）
account.created_time = [NSDate date];

// 自定义对象的存储必须用NSKeyedArchiver，不再有什么writeToFile方法
[NSKeyedArchiver archiveRootObject:account toFile:HWAccountPath];
}

/**
*  返回账号信息
*
*  @return 账号模型（如果账号过期，返回nil）
*/
+ (HWAccount *)account
{
// 加载模型
HWAccount *account = [NSKeyedUnarchiver unarchiveObjectWithFile:HWAccountPath];

/* 验证账号是否过期 */

// 过期的秒数
long long expires_in = [account.expires_in longLongValue];
// 获得过期时间
NSDate *expiresTime = [account.created_time dateByAddingTimeInterval:expires_in];
// 获得当前时间
NSDate *now = [NSDate date];

// 如果expiresTime <= now，过期
/**
NSOrderedAscending = -1L, 升序，右边 > 左边
NSOrderedSame, 一样
NSOrderedDescending 降序，右边 < 左边
*/
NSComparisonResult result = [expiresTime compare:now];
if (result != NSOrderedDescending) { // 过期
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（需要取出哪些属性）
*/
- (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，接口获取授权后的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    当前授权用户的UID。*/
@property (nonatomic, copy) NSString *uid;

/**    access token的创建时间 */
@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.创建一个webView
UIWebView *webView = [[UIWebView alloc] init];
webView.frame = self.view.bounds;
webView.delegate = self;
[self.view addSubview:webView];

// 2.用webView加载登录页面（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    授权回调地址，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.获得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（授权成功后的request token）换取一个accessToken
*
*  @param code 授权成功后的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：授权成功后的回调地址
code：授权成功后返回的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];

// 将返回的账号字典数据 --> 模型，存进沙盒
HWAccount *account = [HWAccount accountWithDict:responseObject];
// 存储账号信息
[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中获得）
NSString *currentVersion = [NSBundle mainBundle].infoDictionary[key];

if ([currentVersion isEqualToString:lastVersion]) { // 版本号相同：这次打开和上次打开的是同一个版本
self.rootViewController = [[HWTabBarViewController alloc] init];
} else { // 这次打开的版本和上一次不一样，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对象就代表一条微博）
*/
@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];

// 获得用户信息（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. 获得用户信息（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.创建下拉菜单
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];

// 取出这条微博的作者（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.能够下拉刷新最新的微博数据
3.能够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];
// 如果仅仅是调整按钮内部titleLabel和imageView的位置，那么在layoutSubviews中单独设置位置即可

// 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，就让按钮重新计算自己的尺寸
[self sizeToFit];
}

- (void)setImage:(UIImage *)image forState:(UIControlState)state
{
[super setImage:image forState:state];

// 只要修改了图片，就让按钮重新计算自己的尺寸
[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    微博作者的用户信息字段 详细*/
@property (nonatomic, strong) HWUser *user;
@end

HWStatus.m

#import "HWStatus.h"

@implementation HWStatus
@end