---
title: QLThumbnailGenerator.Request
framework: quicklookthumbnailing
role: symbol
role_heading: Class
path: quicklookthumbnailing/qlthumbnailgenerator/request
---

# QLThumbnailGenerator.Request

A request to generate a thumbnail for a file.

## Declaration

```swift
class Request
```

## Topics

### Creating a Thumbail Request

- [init(fileAt:size:scale:representationTypes:)](quicklookthumbnailing/qlthumbnailgenerator/request/init(fileat:size:scale:representationtypes:).md)

### Describing the Requested Thumbnail

- [size](quicklookthumbnailing/qlthumbnailgenerator/request/size.md)
- [scale](quicklookthumbnailing/qlthumbnailgenerator/request/scale.md)
- [contentType](quicklookthumbnailing/qlthumbnailgenerator/request/contenttype.md)
- [representationTypes](quicklookthumbnailing/qlthumbnailgenerator/request/representationtypes-swift.property.md)
- [minimumDimension](quicklookthumbnailing/qlthumbnailgenerator/request/minimumdimension.md)
- [iconMode](quicklookthumbnailing/qlthumbnailgenerator/request/iconmode.md)
- [QLThumbnailGenerator.Request.RepresentationTypes](quicklookthumbnailing/qlthumbnailgenerator/request/representationtypes-swift.struct.md)

### Initializers

- [init(coder:)](quicklookthumbnailing/qlthumbnailgenerator/request/init(coder:).md)
- [init(fileAtURL:size:scale:representationTypes:)](quicklookthumbnailing/qlthumbnailgenerator/request/init(fileaturl:size:scale:representationtypes:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Generating a Thumbnail

- [generateBestRepresentation(for:completion:)](quicklookthumbnailing/qlthumbnailgenerator/generatebestrepresentation(for:completion:).md)
- [generateRepresentations(for:update:)](quicklookthumbnailing/qlthumbnailgenerator/generaterepresentations(for:update:).md)