//// OauthViewController.m// 20_帅哥no微博//// Created by beyond on 14-8-5.// Copyright (c) 2014年 com.beyond. All rights reserved.// 授权控制器,仅运行一次,取得了当前用户的access_token和uid之后,存档,切换窗口的主控制器#import "OauthViewController.h"@interface OauthViewController ()<UIWebViewDelegate>{
// 成员变量记住,不同方法中要用到 UIWebView *_webView;
}
@end@implementation OauthViewController-(void)loadView{
// 直接让WebView成为控制器的view,避免再次添加 _webView = [[UIWebView alloc]init];
self.view = _webView;
}
- (void)viewDidLoad{
[super viewDidLoad];
// 设置代理为当前控制器,以便监听webView的开始加载 和结束 加载 _webView.delegate = self;
// 申请认证的地址 NSString *oauthURL = [NSString stringWithFormat:@"https://api.weibo.com/oauth2/authorize?client_id=%@&response_type=code&redirect_uri=%@",kAppKey,kRedirectURL];
// 调用分类的方法,加载申请认证的网址 [_webView loadURLString:oauthURL];
}
#pragma mark - 代理 方法// 开始加载- (void)webViewDidStartLoad:(UIWebView *)webView{
log(@"真的开始加载--%@",webView.request.URL);
// 一开始加载就,显示进度条 MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:webView animated:YES];
hud.labelText = @"页面加载中...";
}
// 是否开始加载某个页面- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
log(@"能否加载--%@",webView.request.URL);
return YES;
}
// 页面加载完成- (void)webViewDidFinishLoad:(UIWebView *)webView{
log(@"加载完毕--%@",webView.request.URL);
// 一旦加载完毕,就隐藏进度条 [MBProgressHUD hideAllHUDsForView:webView animated:YES];
// 用户同意授权之后,返回的URL包含授权的request_code,形如: http://www.abc.com/?code=888888888888 // 返回了用户授权的request_code的页面之后,需要截取code,然后继续拼接url,发起第3次请求(这次必须以POST方式),最终返回需要的access_token NSString *reDirectURLContainsCode = _webView.request.URL.absoluteString;
// 分类方法,从左边标记字串的最后面开始,截取剩下的字符串 NSString *code = [reDirectURLContainsCode subStrFromLeftFlagStr:@"?code="];
//如果 不是返回code的url,不做任何事情 if (code == nil) return;
// 现在准备发起最后一次请求,拼接第3次请求的需要的URL,本次请求返回的东东,才会是最重要的用户的accessToken,也包含了用户的uid NSString *accessTokenRequestURLStr = [NSString stringWithFormat:@"https://api.weibo.com/oauth2/access_token?client_id=%@&client_secret=%@&grant_type=authorization_code&redirect_uri=%@&code=%@",kAppKey,kAppSecret,kRedirectURL,code];
// 1,创建URL NSURL *accessTokenRequestURL = [NSURL URLWithString:accessTokenRequestURLStr];
// 2,创建post请求 NSMutableURLRequest *mutRequest = [[NSMutableURLRequest alloc]initWithURL:accessTokenRequestURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
//设置请求方式为POST，默认为GET [mutRequest setHTTPMethod:@"POST"];
// 3,连接服务器,并接收返回的数据 NSData *receivedData = [NSURLConnection sendSynchronousRequest:mutRequest returningResponse:nil error:nil];
// 将服务器返回的数据转成字串(实质是JSON数据) NSString *responseStr = [[NSString alloc]initWithData:receivedData encoding:NSUTF8StringEncoding];
log(@"Response json is :%@",responseStr);
// 4,从responseStr中(实质是JSON数据)获取到access_token // 将(JSON数据)转成字典先 NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:receivedData options:NSJSONReadingMutableContainers error:nil];
// 通过键,取到access_token NSString *access_token = [dictionary objectForKey:@"access_token"];
log(@"access token is:%@",access_token);
// 通过键,取到用户的uid NSString *uid = [dictionary objectForKey:@"uid"];
log(@"uid is:%@",uid);
// 授权成功,切换根控制器到主控制器 UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"授权成功" delegate:nil cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles: nil];
[actionSheet showInView:self.view.window];
}
@end

{
"access_token":"这个才是真正的ACCESS_TOKEN", "remind_in":"157679999", "expires_in":157679999, "uid":"授权了的那个用户的uid"}