iOS实现第三方微信登录方式实例解析(最新最全)

// // AppDelegate.m // weixinLoginDemo // // Created by 张国荣 on 16/6/20. // Copyright © 2016年 BateOrganization. All rights reserved. // #import "AppDelegate.h" #import "WXApi.h" //微信开发者ID #define URL_APPID @"app id" @end @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //向微信注册应用。 [WXApi registerApp:URL_APPID withDescription:@"wechat"]; return YES; } -(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options{ /*! @brief 处理微信通过URL启动App时传递的数据 * * 需要在 application:openURL:sourceApplication:annotation:或者application:handleOpenURL中调用。 * @param url 微信启动第三方应用时传递过来的URL * @param delegate WXApiDelegate对象，用来接收微信触发的消息。 * @return 成功返回YES，失败返回NO。 */ return [WXApi handleOpenURL:url delegate:self]; } /*! 微信回调，不管是登录还是分享成功与否，都是走这个方法 @brief 发送一个sendReq后，收到微信的回应 * * 收到一个来自微信的处理结果。调用一次sendReq后会收到onResp。 * 可能收到的处理结果有SendMessageToWXResp、SendAuthResp等。 * @param resp具体的回应内容，是自动释放的 */ -(void) onResp:(BaseResp*)resp{ NSLog(@"resp %d",resp.errCode); /* enum WXErrCode { WXSuccess = 0, 成功 WXErrCodeCommon = -1, 普通错误类型 WXErrCodeUserCancel = -2, 用户点击取消并返回 WXErrCodeSentFail = -3, 发送失败 WXErrCodeAuthDeny = -4, 授权失败 WXErrCodeUnsupport = -5, 微信不支持 }; */ if ([resp isKindOfClass:[SendAuthResp class]]) { //授权登录的类。 if (resp.errCode == 0) { //成功。 //这里处理回调的方法 。 通过代理吧对应的登录消息传送过去。 if ([_wxDelegate respondsToSelector:@selector(loginSuccessByCode:)]) { SendAuthResp *resp2 = (SendAuthResp *)resp; [_wxDelegate loginSuccessByCode:resp2.code]; } }else{ //失败 NSLog(@"error %@",resp.errStr); UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"登录失败" message:[NSString stringWithFormat:@"reason : %@",resp.errStr] delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil nil]; [alert show]; } } } @end

// // 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 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_token openid 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