新浪微博Oauth API调用方法

//
//  OauthViewController.m
//  WPWEIBO
//
//  Created by apple on 15/5/12.
//  Copyright (c) 2015年 apple. All rights reserved.
//
#import "OauthViewController.h"
@interface OauthViewController () <UIWebViewDelegate,NSURLConnectionDataDelegate>
@end
@implementation OauthViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    NSString *urlstr = @"https://api.weibo.com/oauth2/authorize?client_id=4293602466&redirect_uri=http://www.baidu.com";
    NSURL *url = [NSURL URLWithString:urlstr];
    
    UIWebView *uiw1 = [[UIWebView alloc] init];
    NSURLRequest *req = [NSURLRequest requestWithURL:url];
    [uiw1 loadRequest:req ];
    uiw1.frame = self.view.bounds;
    [self.view addSubview:uiw1];
    uiw1.delegate = self;
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    
    
    
    NSString *url = request.URL.absoluteString;
//    NSLog(@"%@",url);
    NSRange range = [url rangeOfString:@"code="];
    NSLog(@"%@",NSStringFromRange(range));
    if (range.length != 0)
    {
        NSString *code = [url substringFromIndex:(int)(range.location + range.length)];
        [self getToken:code];
    }
    return YES;
}
- (void)getToken:(NSString *)code
{
    /*
     https://api.weibo.com/oauth2/access_token
     HTTP请求方式
     POST
     请求参数
     必选类型及范围说明
     client_id truestring 申请应用时分配的AppKey。
     client_secret truestring 申请应用时分配的AppSecret。
     grant_type truestring 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 truestring 调用authorize获得的code值。
     redirect_uri truestring 回调地址，需需与注册应用里的回调地址一致。
     */
    
    NSURL *tokenurl = [NSURL URLWithString:@"https://api.weibo.com/oauth2/access_token"];
    NSMutableURLRequest *tokenreq = [[NSMutableURLRequest alloc] initWithURL:tokenurl];
    
    tokenreq.HTTPMethod = @"POST";
    NSString *htpbody = [NSStringstringWithFormat:@"client_id=4293602466&client_secret=4a959234e47bb0fe313b986e610d2891&grant_type=authorization_code&code=%@&redirect_uri=http://www.baidu.com",code];
    tokenreq.HTTPBody = [htpbody dataUsingEncoding:NSUTF8StringEncoding];
    NSURLConnection *urc = [[NSURLConnection alloc] initWithRequest:tokenreq delegate:self];
    [urc start];
    
    
    
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"%@",response);
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSDictionary *jdic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
    NSString *access_token = jdic[@"access_token"];
    
    NSLog(@"%@",access_token);
}
@end