//
//  ViewController.m
//  weixinLoginDemo
//
//  Created by 张国荣 on 16/6/20.
//  Copyright © 2016年 BateOrganization. All rights reserved.
//#import "ViewController.h"
#import "WXApi.h"
#import "AppDelegate.h"
//微信开发者ID
#define URL_APPID @"appid"
#define URL_SECRET @"app secret"
#import "AFNetworking.h"
@interface ViewController ()<WXDelegate>
{AppDelegate *appdelegate;
}
@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.
}
#pragma mark 微信登录
- (IBAction)weixinLoginAction:(id)sender {if ([WXApi isWXAppInstalled]) {SendAuthReq *req = [[SendAuthReq alloc]init];req.scope = @"snsapi_userinfo";req.openID = URL_APPID;req.state = @"1245";appdelegate = [UIApplication sharedApplication].delegate;appdelegate.wxDelegate = self;[WXApi sendReq:req];}else{//把微信登录的按钮隐藏掉。}
}
#pragma mark 微信登录回调。
-(void)loginSuccessByCode:(NSString *)code{NSLog(@"code %@",code);__weak typeof(*&self) weakSelf = self;AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];manager.requestSerializer = [AFJSONRequestSerializer serializer];//请求manager.responseSerializer = [AFHTTPResponseSerializer serializer];//响应manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json", @"text/json",@"text/plain", nil];//通过 appid  secret 认证code . 来发送获取 access_token的请求[manager GET:[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",URL_APPID,URL_SECRET,code] parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {  //获得access_token，然后根据access_token获取用户信息请求。NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];NSLog(@"dic %@",dic);/*access_token   接口调用凭证expires_in    access_token接口调用凭证超时时间，单位（秒）refresh_token  用户刷新access_tokenopenid  授权用户唯一标识scope   用户授权的作用域，使用逗号（,）分隔unionid   当且仅当该移动应用已获得该用户的userinfo授权时，才会出现该字段*/NSString* accessToken=[dic valueForKey:@"access_token"];NSString* openID=[dic valueForKey:@"openid"];[weakSelf requestUserInfoByToken:accessToken andOpenid:openID];} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {NSLog(@"error %@",error.localizedFailureReason);}];}-(void)requestUserInfoByToken:(NSString *)token andOpenid:(NSString *)openID{AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];manager.requestSerializer = [AFJSONRequestSerializer serializer];manager.responseSerializer = [AFHTTPResponseSerializer serializer];[manager GET:[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",token,openID] parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {NSDictionary *dic = (NSDictionary *)[NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];NSLog(@"dic  ==== %@",dic);} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {NSLog(@"error %ld",(long)error.code);}];
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}@end

大功告成。