现在是按照这样的配置

WeChat.isWXAppInstalled()
                                            .then((isInstalled) => {                                                   if (isInstalled) {
                                                        WeChat.pay({
                                                            partnerId: 'xxxxxx',  // 商家向财付通申请的商家id
                                                            prepayId: 'xxxxxx',   // 预支付订单
                                                            nonceStr:'xxxxxx',   // 随机串，防重发
                                                            timeStamp: 'xxxxxxx'    ,  // 时间戳，防重发.
                                                            package: 'Sign=WXPay',    // 商家根据财付通文档填写的数据和签名
                                                            sign: 'xxxxxxxxx'       // 商家根据微信开放平台文档对数据做的签名
                                                            }).then((requestJson)=>{                                                                      //支付成功回调                                           
                                                                      if (requestJson.errCode=="0"){                                                                       //回调成功处理
                                                                      }
                                                                  }).catch((err)=>{
                                                                      Alert.alert('支付失败')
                                                                  })
                                                    } else {
                                                        Alert.alert('请安装微信');
                                                    }
                                             });

但是会出现app直接闪退 微信也没打开的局面。

是因为要安装微信的SDK吗? 老师有微信支付的笔记分享吗。