WXLaunchMiniProgramReq *launchMiniProgramReq = [WXLaunchMiniProgramReq object];

launchMiniProgramReq.userName = appid;  //拉起的小程序的username

launchMiniProgramReq.path = path;//@""; path后携带json字符串，中英文大概在80字符

launchMiniProgramReq.miniProgramType = WXMiniProgramTypeRelease;

[WXApi sendReq:launchMiniProgramReq completion:nil];