微信开发平台已关联小程序 WXLaunchMiniProgramReq *launchMiniProgramReq = [WXLaunchMiniProgramReq object];     launchMiniProgramReq.userName = @"";  //拉起的小程序的username     launchMiniProgramReq.path = nil;    //拉起小程序页面的可带参路径，不填默认拉起小程序首页     launchMiniProgramReq.miniProgramType = WXMiniProgramTypePreview; //拉起小程序的类型     [WXApi sendReq:launchMiniProgramReq]; //    [WXApi openWXApp]; -(void)onResp:(BaseResp *)resp {     if ([resp isKindOfClass:[WXLaunchMiniProgramResp class]])     { //        NSString *string = resp.extMsg;         NSLog(@"respeee:%@",resp.errStr);         // 对应JsApi navigateBackApplication中的extraData字段数据     } } 对应的跳转代码