NetworkExtension · IOS API REFERENCE

NEURLFilterPrefilter

struct · iOS 26.0+ · SDK 27.1

struct NEURLFilterPrefilter

A struct containing a prefilter returned by fetchPrefilter() implementation. NEURLFilterPrefilter must contain a Bloom filter built with the 32-bit FNV-1a and 32-bit MurmurHash3 hash functions, with double hashing. See fetchPrefilter() documentation. Depending on the size of the Bloom Filter data, it can be passed as Data or the path of a file containing the data.

Members (6)

get · iOS 26.0+

murmurSeed

TypeScript

get murmurSeed(): number

Swift declaration

let murmurSeed: UInt32

seed used in MurmurHash3

get · iOS 26.0+

tag

TypeScript

get tag(): string

Swift declaration

let tag: String

The tag of the Bloom filter data, (e.g. the SHA-256 hash of the Bloom filter data)

init · iOS 26.0+

init

TypeScript

static init(data: NEURLFilterPrefilter_PrefilterData, tag: string, bitCount: number, hashCount: number, murmurSeed: number): NEURLFilterPrefilter

Swift declaration

init(data: NEURLFilterPrefilter.PrefilterData, tag: String, bitCount: Int, hashCount: Int, murmurSeed: UInt32)

Initialize a new NEURLFilterPrefilter struct - Parameters - data: data of type PrefilterData, either as Data or a file path to the data - tag: The tag of the Bloom filter data, (e.g. the SHA-256 hash of the Bloom filter data) - bitCount: number of bits in Bloom filter - hashCount: number of hashes for Bloom filter - murmurSeed: seed used in MurmurHash3

get · iOS 26.0+

data

TypeScript

get data(): NEURLFilterPrefilter_PrefilterData

Swift declaration

let data: NEURLFilterPrefilter.PrefilterData

Bloom filter data

get · iOS 26.0+

bitCount

TypeScript

get bitCount(): number

Swift declaration

let bitCount: Int

number of bits in Bloom filter

get · iOS 26.0+

hashCount

TypeScript

get hashCount(): number

Swift declaration

let hashCount: Int

number of hashes for Bloom filter

Skipped declarations

No declarations were skipped in this snapshot.

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