正如评论中提到的，第一个问题已经在这里进行了讨论。

As it mentioned in the comments, first problem is already discussed here.

GPPNativeShareBuilder Protocol Reference 。根据此文档，您不能使用 attachImage 与 setTitle 函数。函数 setPrefillText 可以解决您的问题。

Second problem about text and media simultaneously post is mentioned in API documentation for GPPNativeShareBuilder Protocol Reference. According to this documentation you can't use attachImage with setTitle function. Function setPrefillText could resolve your issue.