A utility for randomly generating data, content, and assets for iOS & macOS apps written in Swift.
[BETA]: this framework is not a complete set of features and is in active development. check the examples documented in this readme for confirmation of what is available.
random-swift is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'random-swift'
add this repository to your project via Swift PM:
Full public documentation of the framework can be found here.
Open AppDelegate.swift
Add an exported import statement to the top of the class like so:
@_exported import random_swift
The framework is now accessible in every class in your project.
Note: There are some differing opinions about @_exported import
, namely, the risk of object and class name collisions between frameworks, however, if you don’t have any issues with the exported import approach in your project, you’re gonna be alright, and the convenience trade-off is probably worth it.
After installing, import into your class:
import random_swift
Currently supported:
Security & true randomness assured by leveraging the underlying arc4random()
generator built into swift
Random
is available as a shared instance within the imported scope (class, project, etc.)
// access it with:
Random.$type
A configuration set persists on the shared instance for the duration of the application session
// setup an IntRange configuration
let intRange = IntRange(lower: 4, upper: 100)
// setup a percentage range configuration
let pctRange = PercentageRange(min: 0.10, max: 0.98)
// assign the configurations
Random.intRange = intRange
Random.percentageRange = pctRange
While this shared instance is still in memory (i.e. the app is still running / not terminated or backgrounded), the last used configuration will be used as the default configuration for any calls for random values that need a range or an upper-bound limit.
You can dynamically use new range configurations if you need to change them on the fly for new requests
An example retrieving a new randomValue with a new range config:
// setup:
let newIntRange = IntRange(lower: 1, upper: 5000)
// get a random int value within the range
let rangedInt = Random.int.withinRange(range: newIntRange)
// get a random int value anywhere between 0 and the newIntRange.upper
Random.int.withUpperLimit(of: newIntRange)
IntRange
and numerical return types are exclusive of the upper-bound:
200
and the lower-bound value is 0
, the only possible values that can return are 0
through 199
.
200
as a possible return value, you simply need to setup the upper-bound as (upper-bound-target-value) + 1
Random supports true random word generation.
Random words are generated from a static dictionary containing 235,886 words, all of which are packaged by default with macOS.
Functions
Get a random Word:
let randomWord = Random.word
Functions
Get a random Int
:
let randomInt = Random.int.value()
Get a random Int
value within a given range between upper and lower bounds, :
// setup a range
let newIntRange = IntRange(lower: 10, upper: 250)
// get a random int value between range.lower and range.upper
let randomIntWithinRange: Int = Random.int.withinRange(range: newIntRange)
Computed Properties
Get a random Int
:
let randomInt = Random.int.value
Note: The following computed properties require configuration to be in place beforehand.
These will always return 0 if:
- A config has not been set by using a function call
- or by directly configuring `Random.intRange`.
Usage is basically the same as a function call:
Get a random Int
below a given IntRange
upper-bound limit:
// setup a range & configure
let range = IntRange(lower: 10, upper: 200)
Random.intRange = range
// get a random int value within the range
let rangedInt = Random.int.withinUpperLimit
Get a random Int
value within a given range between lower and upper bounds:
// setup a range & configure
let range = IntRange(lower: 10, upper: 250)
Random.intRange = range
// get a random int value between range.lower and range.upper
let randomWithinRange: Int = Random.int.withinRange
// randomWithinRange == some Int between 10 and 200, exclusive of 200 (so max 199)
Functions
Get a random percentage (as Double
), rounded (optional) to a maximum decimal place value:
let randomPct = Random.percentage.value(roundedTo: 5)
// returns percentage with no more than 5 place values
// e.g. 0.45369
Get a random percentage below a given PercentageRange
max limit, rounded (optional) to a max number of decimal place values:
// setup a range
let range = PercentageRange(lower: 0.10, upper: 0.999)
// get a random int value within the range
let rangedPct: Double = Random.percentage.withUpperLimit(of: range, maxDecimalPlaces: 3)
// returns percentage with no more than 3 decimal places
// e.g. 0.294
Get a random percentage value within a given range, between min and max limits:
// setup a range
let range = PercentageRange(lower: 0.15, upper: 0.322)
// get a random int value between range.lower and range.upper
let randomPctWithinRange: Double = Random.percentage.withinRange(range, maxDecimalPlaces: 1)
// returns percentage with no more than 1 decimal place
// e.g. 0.6
Computed Properties
Get a random percentage (as Double
):
let randomPct: Double = Random.percentage.value
Note: the following computed properties require configuration to be in place beforehand.
These will always return 0.0 if:
- A config has not been set by using a function call
- or by directly configuring `Random.percentageRange`.
Usage is basically the same as a function call:
Get a random percentage below a given PercentageRange
max limit:
// setup a range & configure shared instance
let range = PercentageRange(lower: 0.15, upper: 0.322)
Random.intRange = range
// get a random percentage value within the range
let rangedPct: Double = Random.percentage.withUpperLimit
Get a random percentage value within a given range, between min and max limits:
// setup a range & configure
let range = PercentageRange(lower: 0.01, upper: 0.9)
Random.intRange = range
// get a random int value between range.lower and range.upper
let randomPctWithinRange: Double = Random.percentage.withinRange
// randomWithinRange == some Int between 0.01 and 0.9, exclusive of 0.9 (so max 0.89)
Functions
Computed Properties
Original Author: Dan Burkhardt Founder & Lead Engineer @GigabiteLabs Twitter: @GigabiteDan
Contributors: (nobody else yet ;)
random-swift is available under the MIT license. See the LICENSE file for more info.
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