ios 微信登录

1.在这里说一下微信登录，其实很简单，配置就根据官方文档配置，就不在这里强调了。第一步：在appDelegate.m中注册微信    BOOL sccurr = [WXApi registerApp:WX_APP];    if (sccurr == YES) {        NSLog(@"微信注册成功");    }else{        NSLog(@"注册失败");    } 第二步：设置微信回调 - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {        return [WXApi handleOpenURL:url delegate:self];}- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {        return [WXApi handleOpenURL:url delegate:self];}//微信登录中这个方法中必须有，不然后走回调失败- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options NS_AVAILABLE_IOS(9_0){        return [WXApi handleOpenURL:url delegate:self];    }}第三步：微信授权-(void)sendAuthRequest{//点击按钮时只需要这几句代码基本就可以调起微信授权登录界面了    //构造SendAuthReq结构体    SendAuthReq* req =[[SendAuthReq alloc ] init ];    req.scope = @"snsapi_userinfo" ;    req.state = @"wxb839cbeb1ab95794" ;    //第三方向微信终端发送一个SendAuthReq消息结构    [WXApi sendReq:req];}第四步：微信回调方法//微信支付回调处理-(void) onResp:(BaseResp*)resp{    if([resp isKindOfClass:[SendAuthResp class]]){        switch (resp.errCode) {                //retcode: 0：用户同意 -4：用户拒绝授权 -2：用户取消            case 0:{   //如果成功了,一般发通知到相应的页面，不要给appDelegate太大的压力                NSMutableDictionary *notDic = [NSMutableDictionary dictionary];                [notDic setValue:resp forKey:@"wxResp"];                [[NSNotificationCenter defaultCenter] postNotificationName:@"wxLogin" object:notDic];            }                break;            case -4:                strMsg = @"用户拒绝授权！";                ZNLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);                //                [FanweMessage alert:strMsg];                break;            case -2:                strMsg = @"用户取消！";                ZNLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);                //                [FanweMessage alert:strMsg];                break;            default:                break;        }    }}第五步：微信回调//1.在相应的点击界面接收通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(wxLogin:) name:@"wxLogin" object:nil];//2.微信回调，在这个方法中就可以拿到微信返回的一个code,看后台要求，如果后台就只需要这个code那么微信登录到这个方法就结束了-(void)wxLogin:(NSNotification *)notification{    BaseResp *resp = notification.object[@"wxResp"];    SendAuthResp *aresp = (SendAuthResp *)resp;    [self weChatCallBackWithCode:aresp.code];}//如果还需要token和openid就调用weChatCallBackWithCode:(NSString *)code方法即可//下面这两个方法中的URL是微信给我们提供的，我们就只需要把参数传给微信就好了，不需要做更改- (void)weChatCallBackWithCode:(NSString *)code{   //得到code进行相应的操作}//这里得到token 和openid- (void)weChatCallBackWithCode:(NSString *)code{    NSString *urlString =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",APPKEY,APP_SECRET,code];//    __block LoginPremiseViewController *loginVC = self;    [[NetWorkManager sharedManager] requestSerializer].timeoutInterval = TimeOutInterval;    [[NetWorkManager sharedManager] GET:urlString parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];    //调用这个方法得到用户信息        [self getUserInfoWithAccessToken:dic[@"access_token"] andOpenId:dic[@"openid"]];    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {    }];}//在这里得到用户信息- (void)getUserInfoWithAccessToken:(NSString *)accessToken andOpenId:(NSString *)openId{        NSString *urlString =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",accessToken,openId];    [[NetWorkManager sharedManager] requestSerializer].timeoutInterval = TimeOutInterval;    [[NetWorkManager sharedManager] GET:urlString parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];        NSLog(@"地产  == %@",dic);    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {    }];}