我有一个上传到s3的简单iOS应用程序。我正在尝试unauth所有-尽管理想情况下我想做Facebook。2个IAM角色(使用向导创建)。IAM身份验证策略(针对未授权角色):{"Version":"2012-10-17","Statement":[{"Action":["mobileanalytics:PutEvents","cognito-sync:*"],"Effect":"Allow","Resource":["*"]},{"Effect":"Allow","Action":["s3:PutObject","s3:GetObject","s3:DeleteObject"],"R