@interface ViewController ()<UIWebViewDelegate>
@property (strong,nonatomic)UIWebView *webView;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    //创建网页视图
    self.webView = [[UIWebView alloc]initWithFrame:self.view.bounds];
    self.webView.delegate = self;
    [self.view addSubview:self.webView];
    
    
    //发送网络请求,在webView中打开OAuth认证的网址
    NSString *strURL = [NSString stringWithFormat:@"%@?client_id=%@&redirect_uri=%@",kStringOAuthURL,kStringAPPKey,kStringRedirectURL];
    NSURL *URL = [NSURL URLWithString:strURL];
    NSURLRequest *request = [NSURLRequest requestWithURL:URL cachePolicy:0 timeoutInterval:-1];
    [self.webView loadRequest:request];
}

#pragma mark - 网页视图代理方法
#pragma mark 通过网页视图的代理监听拦截接口网址，获取code
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
    
    NSString *absoluteURL = request.URL.absoluteString;
    
    WCLog(@"%@",absoluteURL);
    
    //http://www.baidu.com/?code=b6a6e3ba80aac6f5a0b639716c168053
    
    /*
    
     //请求
     https://api.weibo.com/oauth2/authorize?client_id=123050457758183&redirect_uri=http://www.example.com/response&response_type=code
     
    */
    
    if ([absoluteURL hasPrefix:@"http://www.baidu.com"]) {
        
        //截取code
        NSRange range = [absoluteURL rangeOfString:@"code="];
        NSUInteger location = range.location + range.length;
        NSString *code = [absoluteURL substringFromIndex:location];
        
        //进行授权请求
        if ([code length]) {
            
            [self startAccessLoginOAuth:(NSString *)code];
        }
    }
    return YES;
}

#pragma mark - 进行登录授权请求,授权期内不用再进行授权
-(void)startAccessLoginOAuth:(NSString *)code{
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [[AFJSONResponseSerializer alloc]init];
    /*
     
     //同意授权后会重定向
     http://www.example.com/response&code=CODE
    
     POST
     请求参数
     必选    类型及范围    说明
     client_id    true    string    申请应用时分配的AppKey。
     client_secret    true    string    申请应用时分配的AppSecret。
     grant_type    true    string    请求的类型，填写authorization_code
     
     grant_type为authorization_code时
     必选    类型及范围    说明
     code    true    string    调用authorize获得的code值。
     redirect_uri    true    string    回调地址，需需与注册应用里的回调地址一致。
    */
    
    //设置POST参数
    NSDictionary *parameters =
                        @{
                            @"client_id":kStringAPPKey,
                            @"client_secret":kStringAPPSecret,
                            @"grant_type":@"authorization_code",
                            @"code":code,
                            @"redirect_uri":@"http://www.baidu.com"
                        };
    
    ////获取access_token
    [manager POST:kStringAccessTokenURL parameters:parameters success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        
        //WCLog(@"%@---%@",operation,responseObject);
        
        /*
         下面返回的这些信息用来做账户管理，可以创建一个账户和一个账户管理类，以便用来控制用户的登录：
         如果access_token令牌未超期，可以直接登录；
         如果access_token令牌超期，需要重新授权登录。
         
         账户信息：
         responseObject:
           {
             "access_token" = "2.00HMevMDjoPWRBc1b0d128a3DxHy8D";
             "expires_in" = 157679999;
             "remind_in" = 157679999;
             uid = 2939453735;
           }
        */
        
       //1.创建当前账户实例并初始化
       //2.创建账户管理实例的单例
       //3.保存帐户
       //4.设为当前帐户
       //5.设置主窗口为rootViewController,直接进入用户主页
        
        /**
         获取当前用的微博信息
        */
       [self getUserStatuesInfo:responseObject[@"access_token"]];
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        WCLog(@"授权失败:%@",error);
    }];
}

//获取当前用的微博信息
-(void)getUserStatuesInfo:(NSString *)access_token{
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [[AFJSONResponseSerializer alloc]init];
    
    //设置GET参数
    NSDictionary *parameters =
                            @{
                              @"client_id":kStringAPPKey,
                              @"client_secret":kStringAPPSecret,
                              @"access_token":access_token,
                            };
    [manager GET:kStatuesFriendTimeLineURL parameters:parameters success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
        
        NSArray *statues = responseObject[@"statuses"];
        [statues enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            
            WCLog(@"%@",obj);
        }];

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        WCLog(@"%@",error);
    }];

}
@end