iOS微博授权登录及获取用户数据的方法

前言：

           平时 在开发一个app应用时，往往 为了考虑用户体验以及防治用户的流失，都需要给应用添加第三方授权登录的功能。下面给大家说一下两种实现授权登录以及请求微博openAPI的方法。

第一种方法：使用WeiboSDK授权实现

(注:应先参照官方SDK文档，按要求导入相应的framework文件，然后在代码中声明,WeiboSDKDelegate>代理)

①定义应⽤认证所需的几个常量：

AppKey:第三⽅方应⽤用申请的appkey,⽤用来⾝身份鉴证、显⽰示来源等;

AppRedirectURL:应⽤用回调⻚页,在进⾏行Oauth2.0登录认证时所⽤用。

 #define kAppKey @"2066759248"
 #define kRedirectURL @"https://api.weibo.com/oauth2/default.html"

②注册appkey(clientid) ：程序启动时,在代码中向微博终端注册你的 Appkey 

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     [WeiboSDK enableDebugMode:YES];
     [WeiboSDK registerApp:kAppKey];
     return YES;
 }

③重写AppDelegate的handleOpenURL和openURL⽅方法 ：

 -(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
 {
     return [WeiboSDK handleOpenURL:url delegate:self];
 }
 -(BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
 {
     return [WeiboSDK handleOpenURL:url delegate:self];
 }

④你的授权登录按钮的@selector响应事件应为以下内容：

 {                                                                                                                             //微博客户端授权认证
     WBAuthorizeRequest *request=[WBAuthorizeRequest request];
     request.redirectURI=@"https://api.weibo.com/oauth2/default.html" ;
     request.scope = @"all";
     [WeiboSDK sendRequest:request];
 }

⑤用这事件能收到授权成功的回应，并根据回应可以得到基本的数据

(在iOS9下直接进行HTTP请求.系统会告诉我们不能直接使用HTTP进行请求,需要在Info.plist新增一段用于控制ATS的配置: 配置方法)

 -(void)didReceiveWeiboResponse:(WBBaseResponse *)response
 {
      if ([response isKindOfClass:WBAuthorizeResponse.class])
     {    //获取accessToken，userID等，wbtoken,wbcurrentUserID，wbRefreshToken是自定义NSString型的属性
         self.wbtoken = [(WBAuthorizeResponse *)response accessToken];
         self.wbCurrentUserID = [(WBAuthorizeResponse *)response userID];
         self.wbRefreshToken = [(WBAuthorizeResponse *)response refreshToken];

 //获取用户的粉丝数、关注数、微博数,根据微博开放平台获取此数据必须需要access_token,uids
         NSArray *arr=[NSArray arrayWithObjects:self.wbtoken,self.wbCurrentUserID,nil];
         NSArray *arr1=[NSArray arrayWithObjects:@"access_token",@"uids", nil];
         NSDictionary *dic=[[NSDictionary alloc]initWithObjects:arr forKeys:arr1];
 //发送请求 获取各种数据 对应的URL和请求方式heepMethod是不同的 详细的参考微博开放平台
  [WBHttpRequest requestWithURL:@"https://api.weibo.com/2/users/counts.json" httpMethod:@"GET" params:dic delegate:self withTag:@"me"];
 }  }

⑥上面使用WBHttpRequest发送请求后，用这事件接收请求回来的数据

 -(void)request:(WBHttpRequest *)request didFinishLoadingWithResult:(NSString *)result
 {
     NSData *data=[result dataUsingEncoding:NSUTF8StringEncoding];
     NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];                //打印接收到的数据，可以根据需要而从字典里取出来
    NSLog(@"%@",dic);
 }

第二种方法：使用<UIWebViewDelegate>网页授权实现

 #import
 //先定义一个全局变量UIWebView，并声明UIWebViewDelegate代理：
 @interface OAuthWebViewController : UIViewController
 {
 UIWebView *webView;
 }
 @end

 #import "OAuthWebViewController.h"

 @implementation OAuthWebViewController

 -(void)viewWillAppear:(BOOL)animated
 {
     [super viewWillAppear:animated];

     NSString *url=@"https://api.weibo.com/oauth2/authorize?client_id=2066759248&response_type=code&redirect_uri=https://api.weibo.com/oauth2/default.html";
     // client_id、redirect_uri后面的分别是App Key和回调页面，每个人的都是不同的，具体去微博开放平台查看
     NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:url]];
     [webView setDelegate:self];
     [webView loadRequest:request];
 }

 -(void)viewDidLoad
 {
     [super viewDidLoad];
 }

 #pragma mark - UIWebView Delegate Methods

 -(void)webViewDidFinishLoad:(UIWebView *)_webView
 {
     NSString *url = _webView.request.URL.absoluteString;
     NSLog(@"absoluteString:%@",url);

     if ([url hasPrefix:@"https://api.weibo.com/oauth2/default.html?"]) {

         //找到”code=“的range
         NSRange rangeOne;
         rangeOne=[url rangeOfString:@"code="];

         //根据他“code=”的range确定code参数的值的range
         NSRange range = NSMakeRange(rangeOne.length+rangeOne.location, url.length-(rangeOne.length+rangeOne.location));
         //获取code值
         NSString *codeString = [url substringWithRange:range];
         NSLog(@"code = :%@",codeString);

         //access token调用URL的string
         NSMutableString *muString = [[NSMutableString alloc] initWithString:@"https://api.weibo.com/oauth2/access_token?client_id=2066759248&client_secret=fa39a851630a5d4ac05b26f7f4c7a670&grant_type=authorization_code&redirect_uri=https://api.weibo.com/oauth2/default.html&code="];
         // client_id、client_secret、redirect_uri后面的分别是App Key、App Secret、回调页面
         [muString appendString:codeString];
         NSLog(@"access token url :%@",muString);

         //第一步，创建URL
         NSURL *urlstring = [NSURL URLWithString:muString];
         //第二步，创建请求
         NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:urlstring cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
         [request setHTTPMethod:@"POST"];//设置请求方式为POST，默认为GET
         NSString *str = @"type=focus-c";//设置参数
         NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];
         [request setHTTPBody:data];
         //第三步，连接服务器
         NSData *received = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

         NSError *error;
         //如何从str1中获取到access_token、uid
         NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:received options:NSJSONReadingMutableContainers error:&error];

         NSString *_access_token = [dictionary objectForKey:@"access_token"];
         NSString *uid=[dictionary objectForKey:@"uid"];
          //如果获取到access_token，则授权成功，接下来是获取微博用户数据，与上面类似
         if(_access_token)
         {
             //根据微博开放平台的要求，填写相应数据
             NSString *str2=[NSString stringWithFormat:@"https://api.weibo.com/2/users/show.json?access_token=%@&uid=%@",_access_token,uid];
             NSURL *url2 = [NSURL URLWithString:str];
             NSMutableURLRequest *request2= [[NSMutableURLRequest alloc]initWithURL:url2 cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
             [request2 setHTTPMethod:@"POST"];
             NSData *received2= [NSURLConnection sendSynchronousRequest:request2 returningResponse:nil error:nil];
             NSDictionary *dictionary2 = [NSJSONSerialization JSONObjectWithData:received2 options:NSJSONReadingMutableContainers error:&error];
             //输出接收到的字典，根据需要取相应的值
             NSLog(@"%@",dictionary);
         }

     }
 }

 @end