iOS微信公众号订阅

app中可向微信申请一条公众号消息

官网链接：https://developers.weixin.qq.com/doc/oplatform/Mobile_App/One-time_subscription_info.html

根据官网步骤一步步集成。

1.微信用户同意授权，获取一次给用户推送一条订阅消息的机会

WXSubscribeMsgReq \*req = [[WXSubscribeMsgReq alloc] init];

req.scene = scene;

req.templateId = templateId;

req.reserved = reserved;

[WXApi sendReq:req];

2.通过 API 推送订阅模板消息给到授权微信用户

POST https://api.weixin.qq.com/cgi-bin/message/template/subscribe?access_token=ACCESS_TOKEN

参数{"touser":"OPENID","template_id":"TEMPLATE_ID","url":"URL","scene":"SCENE","title":"TITLE","data":{"content":{"value":"VALUE","color":"COLOR"}}}

代码：

+(void)PostJsonHeader:(NSString *)header parameters:(NSDictionary *)parameters /*success:(successCallBack)success failure:(failureCallBack)failure*/{

    AFURLSessionManager *manager = [[AFURLSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

    NSMutableURLRequest *request = [[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:header parameters:parameters error:nil];

    request.timeoutInterval=10.f;

    [requestsetValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

    NSURLSessionDataTask* task = [managerdataTaskWithRequest:requestcompletionHandler:^(NSURLResponse*_Nonnullresponse,id  _NullableresponseObject,NSError*_Nullableerror) {

        if(!error) {

            if([responseObjectisKindOfClass:[NSDictionaryclass]]) {

                //成功

            }else{

            }

        }else{

            //失败

        }

    }];

    [taskresume];

}

附获取 access_token 说明：

GET https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET

注意点

1.消息为一次性消息，一次申请只能使用一次。

2.access_token需要获取，和网页授权token不同。

3.scene需要带入，否则用户拒绝接受。user refuse to accept the msg hint

4.格式不正确，检查参数，和请求方式。