背景：通过领取会员卡打开白屏，如图2

目前发现安卓和ios14以上可以正常打开，ios18打开白屏

排查代码发送调用链路：

1、https://api.weixin.qq.com/card/membercard/activate/geturl

2、接口1返回的url原封不动的调用https://api.weixin.qq.com/cgi-bin/message/custom/send，url没有做过任何urlencode或urldecode动作

调用接口https://api.weixin.qq.com/card/membercard/activate/geturl响应如下：

{"errcode":0,"errmsg":"ok","url":"https:\/\/mp.weixin.qq.com\/bizmall\/activatemembercard?action=preshow&&encrypt_card_id=jtuq%2BUvYRK%2BE5VJsbL814Mo0cMf%2BjoSvKWehHarcHfogFb4HWZoANwSL7alu7xfF&outer_str=eyJjbGllbnQiOiIxMDAwMTkwMiIsImNyb3BJZCI6Ind3ZjEzZDdkMzRjMDNkZTg4NyIsImV4dGVybmFsVXNlcklEIjoid21uN1FyQmdBQVdrWG1hOFhxSnBMR0xYSWJ6OXhiQkEiLCJvcmdDb2RlIjoiMTAwMDAwIiwic3RvQ29kZSI6IjEwMDM4IiwidXNlcklkIjoiMTE1OSIsInd3VXNlcklkIjoiTGlKaW5ZYW4ifQ%3D%3D&biz=Mzg5NjU3NDcxMw%3D%3D#wechat_redirect"}

排查能打开的URL区别在于：encrypt_card_id urldecode

可以打开的：encrypt_card_id=jtuq%2BUvYRK%2BE5VJsbL814Mo0cMf%2BjoSvKWehHarcHfogFb4HWZoANwSL7alu7xfF

不可以打开的：encrypt_card_id=jtuq+UvYRK+E5VJsbL814Mo0cMf+joSvKWehHarcHfogFb4HWZoANwSL7alu7xfF

2025.11.4 做了https:\/\/mp.weixin.qq.com\/bizmall\/activatemembercard?action=preshow&&encrypt_card_id=jtuq%2BUvYRK%2BE5VJsbL814Mo0cMf%2BjoSvKWehHarcHfogFb4HWZoANwSL7alu7xfF&outer_str=eyJjbGllbnQiOiIxMDAwMTkwMiIsImNyb3BJZCI6Ind3ZjEzZDdkMzRjMDNkZTg4NyIsImV4dGVybmFsVXNlcklEIjoid21uN1FyQmdBQVdrWG1hOFhxSnBMR0xYSWJ6OXhiQkEiLCJvcmdDb2RlIjoiMTAwMDAwIiwic3RvQ29kZSI6IjEwMDM4IiwidXNlcklkIjoiMTE1OSIsInd3VXNlcklkIjoiTGlKaW5ZYW4ifQ%3D%3D&biz=Mzg5NjU3NDcxMw%3D%3D#wechat_redirect 的urldecode 导致所有设备无法打开

2025.11.5 做了encrypt_card_id urldecode，也导致所有设备无法访问

总结：IOS 18做encrypt_card_id urlencode感觉可以解决问题。但其它系统版本可能会出现无法访问的问题