小编Kho*_*hoa的帖子

guard let url = Bundle.main.url(forResource: "myVase", withExtension: "obj") else {
    fatalError("Failed to find model file.")
}

let asset = MDLAsset(url:url)
guard let object = asset.object(at: 0) as? MDLMesh else {
    fatalError("Failed to get mesh from asset.")
}

但是，当我更改代码以使用Amazon S3 中的文件而不是本地文件时。我收到错误：“无法打开 OBJ 文件”和“无法从资产获取网格。” 这是我的代码：

let url = URL.init(string: "https://s3.amazonaws.com/myObject/.../object.obj")

let asset = MDLAsset(url:url!)
guard let object = asset.object(at: 0) as? MDLMesh else {
   fatalError("Failed to get mesh from asset.")
} …