ios, sdk 版本 2.0.4，部分手机支付后不会走回调，正常的日志是这样的：

WX-------wxlog:set property list

WX-------wxlog:launch app with ul only success

WX-------wxlog:launch app with universal link, ret:1

WX-------wxlog:req:<PayReq: 0x30168c140>, cid:a0e03a001cfcf114f5335ba448eb4a93cc4000f76f88f9df5ff67e187cac9de4

有问题的日志是：

WX-------wxlog:set property list

WX-------wxlog:Error:fail to load Keychain status:-25300, keyData null:1

WX-------wxlog:token[(null)] is null

WX-------wxlog:Error:launch app with ul only fail, url:https://help.wechat.com/app/xxxx/pay/?....

WX-------wxlog:Error:lauch app fail and need degrade, url:https://help.wechat.com/app/xxxx/pay/?...,

schemeURL:weixin://app/xxxx/pay/?....

WX-------wxlog:launch app with url success

WX-------wxlog:degrade launch app ret:1, with url:weixin://app/xxxx/pay/?......