// 
// AppDelegate.m 
// weixinLoginDemo 
// 
// Created by 張國榮 on 16/6/20. 
// Copyright © 2016年 BateOrganization. All rights reserved. 
// 
#import "AppDelegate.h" 
#import "WXApi.h" 
//微信開發(fā)者ID 
#define URL_APPID @"app id" 
@end 
@implementation AppDelegate 
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
//向微信注冊(cè)應(yīng)用。 
[WXApi registerApp:URL_APPID withDescription:@"wechat"]; 
return YES; 
} 
-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options{ 
/*! @brief 處理微信通過URL啟動(dòng)App時(shí)傳遞的數(shù)據(jù) 
* 
* 需要在 application:openURL:sourceApplication:annotation:或者application:handleOpenURL中調(diào)用。 
* @param url 微信啟動(dòng)第三方應(yīng)用時(shí)傳遞過來的URL 
* @param delegate WXApiDelegate對(duì)象，用來接收微信觸發(fā)的消息。 
* @return 成功返回YES，失敗返回NO。 
*/ 
return [WXApi handleOpenURL:url delegate:self]; 
} 
/*! 微信回調(diào)，不管是登錄還是分享成功與否，都是走這個(gè)方法 @brief 發(fā)送一個(gè)sendReq后，收到微信的回應(yīng) 
* 
* 收到一個(gè)來自微信的處理結(jié)果。調(diào)用一次sendReq后會(huì)收到onResp。 
* 可能收到的處理結(jié)果有SendMessageToWXResp、SendAuthResp等。 
* @param resp具體的回應(yīng)內(nèi)容，是自動(dòng)釋放的 
*/ 
-(void) onResp:(BaseResp*)resp{ 
NSLog(@"resp %d",resp.errCode); 
/* 
enum WXErrCode { 
WXSuccess = 0, 成功 
WXErrCodeCommon = -1, 普通錯(cuò)誤類型 
WXErrCodeUserCancel = -2, 用戶點(diǎn)擊取消并返回 
WXErrCodeSentFail = -3, 發(fā)送失敗 
WXErrCodeAuthDeny = -4, 授權(quán)失敗 
WXErrCodeUnsupport = -5, 微信不支持 
}; 
*/ 
if ([resp isKindOfClass:[SendAuthResp class]]) { //授權(quán)登錄的類。 
if (resp.errCode == 0) { //成功。 
//這里處理回調(diào)的方法 。 通過代理吧對(duì)應(yīng)的登錄消息傳送過去。 
if ([_wxDelegate respondsToSelector:@selector(loginSuccessByCode:)]) { 
SendAuthResp *resp2 = (SendAuthResp *)resp; 
[_wxDelegate loginSuccessByCode:resp2.code]; 
} 
}else{ //失敗 
NSLog(@"error %@",resp.errStr); 
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"登錄失敗" message:[NSString stringWithFormat:@"reason : %@",resp.errStr] delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"確定", nil nil]; 
[alert show]; 
} 
} 
} 
@end

// 
// ViewController.m 
// weixinLoginDemo 
// 
// Created by 張國榮 on 16/6/20. 
// Copyright © 2016年 BateOrganization. All rights reserved. 
// 
#import "ViewController.h" 
#import "WXApi.h" 
#import "AppDelegate.h" 
//微信開發(fā)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 微信登錄 
- (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{ 
//把微信登錄的按鈕隱藏掉。 
} 
} 
#pragma mark 微信登錄回調(diào)。 
-(void)loginSuccessByCode:(NSString *)code{ 
NSLog(@"code %@",code); 
__weak typeof(*&self) weakSelf = self; 
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; 
manager.requestSerializer = [AFJSONRequestSerializer serializer];//請(qǐng)求 
manager.responseSerializer = [AFHTTPResponseSerializer serializer];//響應(yīng) 
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json", @"text/json",@"text/plain", nil nil]; 
//通過 appid secret 認(rèn)證code . 來發(fā)送獲取 access_token的請(qǐng)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) { //獲得access_token，然后根據(jù)access_token獲取用戶信息請(qǐng)求。 
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil]; 
NSLog(@"dic %@",dic); 
/* 
access_token 接口調(diào)用憑證 
expires_in access_token接口調(diào)用憑證超時(shí)時(shí)間，單位（秒） 
refresh_token 用戶刷新access_token 
openid 授權(quán)用戶唯一標(biāo)識(shí) 
scope 用戶授權(quán)的作用域，使用逗號(hào)（,）分隔 
unionid 當(dāng)且僅當(dāng)該移動(dòng)應(yīng)用已獲得該用戶的userinfo授權(quán)時(shí)，才會(huì)出現(xiàn)該字段 
*/ 
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