ImageKit.io iOS SDK

ImageKit iOS Pod allows you to use real-time image resizing, optimization, and file uploading in the client-side.

Installation

Requirements

The library requires Swift 4.0 or above.

CocoaPods

You can use CocoaPods to install ImageKit by adding it to your Podfile:

use_frameworks!

target 'target_name' do
    pod 'ImageKitIO'
end

Usage

Initialization

urlEndpoint is the required parameter. You can get the value of URL-endpoint from your ImageKit dashboard - https://imagekit.io/dashboard#url-endpoints.

publicKey and authenticationEndpoint parameters are optional and only needed if you want to use the SDK for client-side file upload. You can get these parameters from the developer section in your ImageKit dashboard - https://imagekit.io/dashboard#developers.

transformationPosition is optional. The default value for this parameter is TransformationPosition.PATH. Acceptable values are TransformationPosition.PATH & TransformationPosition.QUERY

Note: Do not include your Private Key in any client-side code, including this SDK or its initialization.

// AppDelegate.swift

ImageKit.init(
    publicKey: "your_public_api_key=", 
    urlEndpoint: "https://ik.imagekit.io/your_imagekit_id", 
    transformationPosition: TransformationPosition.PATH, 
    authenticationEndpoint: "http://www.yourserver.com/auth")

Quick Examples

URL construction

Using image path

//https://ik.imagekit.io/your_imagekit_id/default-image.jpg?tr=h-400.00,ar-3-2
ImageKit.shared.url(
            path: "default-image.jpg",
            transformationPosition: "query"
        )
        .height(height: 400)
        .aspectRatio(width: 3, height: 2)
        .create()

Using full image URL

// https://ik.imagekit.io/your_imagekit_id/medium_cafe_B1iTdD0C.jpg?tr=oi-logo-white_SJwqB4Nfe.png,ox-10,oy-20
ImageKit.shared.url(
            src: "https://ik.imagekit.io/your_imagekit_id/medium_cafe_B1iTdD0C.jpg",
            transformationPosition: "path"
        )
        .overlayImage("logo-white_SJwqB4Nfe.png")
        .overlayX(10)
        .overlayY(20)
        .create()

Using a custom parameter

// https://ik.imagekit.io/your_imagekit_id/plant.jpeg?tr=w-400,ot-Hand with a green plant,otc-264120,ots-30,ox-10,oy-10
ImageKit.shared.url(
    src : "https://ik.imagekit.io/your_imagekit_id/plant.jpeg?tr=oi-logo-white_SJwqB4Nfe.png,ox-10,oy-20"
    )
        .addCustomTransformation("w", "400")
        .overlayText("Hand with a green plant")
        .overlayTextColor("264120")
        .overlayTextSize(30)
        .overlayX(10)
        .overlayY(10)
        .create()

Upload file from UIImage

let image: UIImage
ImageKit.shared.uploader().upload(
  file: image,
  fileName: "sample-image.jpg",
  useUniqueFilename: true,
  tags: ["demo"],
  folder: "/",
  isPrivateFile: false,
  customCoordinates: "",
  responseFields: "",
  signatureHeaders: ["x-test-header":"Test"],
  progress: { progress in
  	// Handle Progress
  },
  completion: { result in 
  	 switch result{
            case .success(let uploadAPIResponse):
                // Handle Success Response
            case .failure(let error as UploadAPIError):
                // Handle Upload Error
            case .failure(let error):
                // Handle Other Errors
      }
  }
)

Upload file from a remote URL

ImageKit.shared.uploader().upload(
  file: "https://www.example.com/sample-image.jpg",
  fileName: "sample-image.jpg",
  useUniqueFilename: true,
  tags: ["demo"],
  folder: "/",
  isPrivateFile: false,
  customCoordinates: "",
  responseFields: "",
  signatureHeaders: ["x-test-header":"Test"],
  progress: { progress in
  	// Handle Progress
  },
  completion: { result in 
  	 switch result{
            case .success(let uploadAPIResponse):
                // Handle Success Response
            case .failure(let error as UploadAPIError):
                // Handle Upload Error
            case .failure(let error):
                // Handle Other Errors
      }
  }
)

Upload file using Data

let data : Data
ImageKit.shared.uploader().upload(
  file: data,
  fileName: "sample-image.jpg",
  useUniqueFilename: true,
  tags: ["demo"],
  folder: "/",
  isPrivateFile: false,
  customCoordinates: "",
  responseFields: "",
  signatureHeaders: ["x-test-header":"Test"],
  progress: { progress in
  	// Handle Progress
  },
  completion: { result in 
  	 switch result{
            case .success(let uploadAPIResponse):
                // Handle Success Response
            case .failure(let error as UploadAPIError):
                // Handle Upload Error
            case .failure(let error):
                // Handle Other Errors
      }
  }
)

Demo application

The official step by step iOS quick start guide - https://docs.imagekit.io/getting-started/quickstart-guides/ios
You can also run the demo application in Example folder by running pod install and then open ImageKit.xcworkspace in the terminal.

Components

The library includes 3 Primary Classes:

ImageKit for defining options like urlEndpoint, publicKey or authenticationEndpoint for the application to use.
ImageKitURLConstructor for constructing image urls.
ImageKitUploaderfor client-side file uploading.

ImageKit

In order to use the SDK, you need to provide it with a few configuration parameters.

ImageKit.init(
  urlEndpoint: "https://ik.imagekit.io/your_imagekit_id", // Required.
  publicKey: "your_public_api_key=",  //Optional
  transformationPosition: TransformationPosition.PATH, //Optional
  authenticationEndpoint: "http://www.yourserver.com/auth" //Optional
)

urlEndpoint is required to use the SDK. You can get URL-endpoint from your ImageKit dashboard - https://imagekit.io/dashboard#url-endpoints.
publicKey and authenticationEndpoint parameters are required if you want to use the SDK for client-side file upload. You can get these parameters from the developer section in your ImageKit dashboard - https://imagekit.io/dashboard#developers.
transformationPosition is optional. The default value for this parameter is TransformationPosition.PATH. Acceptable values are TransformationPosition.PATH & TransformationPosition.QUERY

Note: Do not include your Private Key in any client-side code.

Constructing Image URLs

The ImageKitURLConstructor is used to create a url that can be used for rendering and manipulating images in real-time. ImageKitURLConstructor consists of functions that can be chained together to perform transformations.

ImageKitURLConstructor can be initialized by calling ImageKit.shared.url(...) with a set of parameters defined below.

Parameter	Type	Description
urlEndpoint	String	Optional. The base URL to be appended before the path of the image. If not specified, the URL-endpoint specified in the parent `IKContext` component is used. For example, https://ik.imagekit.io/your_imagekit_id/endpoint/
path	String	Conditional. This is the path at which the image exists. For example, `/path/to/image.jpg`. Either the `path` or `src` parameter needs to be specified for URL generation.
src	String	Conditional. This is the complete URL of an image already mapped to ImageKit. For example, `https://ik.imagekit.io/your_imagekit_id/endpoint/path/to/image.jpg`. Either the `path` or `src` parameter needs to be specified for URL generation.
transformationPosition	TransformationPosition	Optional. The default value is `.PATH` that places the transformation string as a URL path parameter. It can also be specified as `.QUERY`, which adds the transformation string as the URL's query parameter i.e.`tr`. If you use `src` parameter to create the URL, then the transformation string is always added as a query parameter.

The transformations to be applied to the URL can be chained to ImageKit.shared.url(...). See the list of different tranformations. Different steps of a chained transformation can be added by calling the function chainTransformation.

Basic Examples

// https://ik.imagekit.io/your_imagekit_id/default-image.jpg?tr=h-400.00,ar-3-2
ImageKit.shared.url(
  path: "default-image.jpg",
  transformationPosition: "query"
)
.height(height: 400)
.aspectRatio(width: 3, height: 2)
.create()

More Examples can be found in Tests/Tests.swift

List of supported transformations

The complete list of transformations supported and their usage in ImageKit can be found here. The SDK provides a function for each transformation parameter, making the code simpler and readable. If a transformation is supported in ImageKit, but if a name for it cannot be found in the table below, then use the addCustomTransformation function and pass the transformation code from ImageKit docs as the first parameter and value as the second parameter. For example - .addCustomTransformation("w", "400")

Expand

Supported Transformation Name	Transformation Function Prototypes	Translates to parameter
height	height(height: Int)	h
width	width(width: Int)	w
aspectRatio	aspectRatio(width: Int, height: Int)	ar
quality	quality(quality: Int)	q
crop	crop(cropType: CropType)	c
cropMode	cropMode(cropMode: CropMode)	cm
x, y	focus(x: Int, y: Int)	x, y
focus	focus(focusType: FocusType)	fo
format	format(format: Format)	f
radius	radius(radius: Int)	r
background	background(backgroundColor: String) background(backgroundColor: UIColor)	bg
border	border(borderWidth: Int, borderColor: String) border(borderWidth: Int, borderColor: UIColor)	b
rotation	rotation(rotation: Rotation)	rt
blur	blur(blur: Int)	bl
named	named(namedTransformation: String)	n
overlayX	overlayX(overlayX: Int)	ox
overlayY	overlayY(overlayY: Int)	oy
overlayFocus	overlayFocus(overlayFocus: OverlayFocusType)	ofo
overlayHeight	overlayHeight(overlayHeight: Int)	oh
overlayWidth	overlayWidth(overlayWidth: Int)	ow
overlayImage	overlayImage(overlayImage: String)	oi
overlayImageTrim	overlayImageTrim(overlayImageTrim: Bool)	oit
overlayImageAspectRatio	overlayImageAspectRatio(width: Int, height: Int)	oiar
overlayImageBackground	overlayImageBackground(overlayImageBackground: String) overlayImageBackground(overlayImageBackground: UIColor)	oibg
overlayImageBorder	overlayImageBorder(borderWidth: Int, borderColor: String) overlayImageBorder(borderWidth: Int, borderColor: UIColor)	oib
overlayImageDPR	overlayImageDPR(dpr: Float)	oidpr
overlayImageQuality	overlayImageQuality(quality: Int)	oiq
overlayImageCropping	overlayImageCropping(cropMode: CropMode)	oic
overlayText	overlayText(overlayText: String)	ot
overlayTextFontSize	overlayTextFontSize(overlayTextSize: Int)	ots
overlayTextFontFamily	overlayTextFontFamily(overlayTextFontFamily: OverlayTextFont)	otf
overlayTextColor	overlayTextColor(overlayTextColor: String) overlayTextColor(overlayTextColor: UIColor)	otc
overlayTextTransparency	overlayTextTransparency(overlayTextTransparency: Int)	oa
overlayAlpha	overlayAlpha(overlayAlpha: Int)	oa
overlayTextTypography	overlayTextTypography(overlayTextTypography: OverlayTextTypography)	ott
overlayBackground	overlayBackground(overlayBackground: String) overlayBackground(overlayBackground: UIColor)	obg
overlayTextEncoded	overlayTextEncoded(overlayTextEncoded: String, encoded: Bool = false)	ote
overlayTextWidth	overlayTextWidth(width: Int)	otw
overlayTextBackground	overlayTextBackground(overlayTextColor: String) overlayTextBackground(overlayTextColor: UIColor)	otbg
overlayTextPadding	overlayTextPadding(overlayTextPadding: String) overlayTextPadding(overlayTextPadding: Int) overlayTextPadding(verticalPadding: Int, horizontalPadding: Int) overlayTextPadding(topPading: Int, horizontalPadding: Int, bottomPadding: Int) overlayTextPadding(topPading: Int, rightPadding: Int, bottomPadding: Int, leftPadding: Int)	otp
overlayTextInnerAlignment	overlayTextInnerAlignment(overlayTextInnerAlignment: OverlayTextInnerAlignment)	otia
overlayRadius	overlayRadius(radius: Int)	or
progressive	progressive(flag: Bool)	pr
lossless	lossless(flag: Bool)	lo
trim	trim(flag: Bool) trim(value: Int)	t
metadata	metadata(flag: Bool)	md
colorProfile	colorProfile(flag: Bool)	cp
defaultImage	defaultImage(defaultImage: String)	di
dpr	dpr(dpr: Float)	dpr
effectSharpen	effectSharpen(value: Int = 0)	e-sharpen
effectUSM	effectUSM(radius: Float, sigma: Float, amount: Float, threshold: Float)	e-usm
effectContrast	effectContrast(flag: Bool)	e-contrast
effectGray	effectGray(flag: Bool)	e-grayscale
original	original()	orig

File Upload

The SDK provides a simple interface using the ImageKit.shared.uploader().upload(...) method to upload files to the ImageKit Media Library. It accepts all the parameters supported by the ImageKit Upload API.

Make sure that you have specified authenticationEndpoint during SDK initialization. The SDK makes an HTTP GET request to this endpoint and expects a JSON response with three fields i.e. signature, token, and expire.

Learn how to implement authenticationEndpoint on your server.

The ImageKit.shared.uploader().upload(...) accepts the following parameters

Parameter	Type	Description
file	Data / UIImage / String	Required.
fileName	String	Required. If not specified, the file system name is picked.
useUniqueFileName	Boolean	Optional. Accepts `true` of `false`. The default value is `true`. Specify whether to use a unique filename for this file or not.
tags	Array of string	Optional. Set the tags while uploading the file e.g. ["tag1","tag2"]
folder	String	Optional. The folder path (e.g. `/images/folder/`) in which the file has to be uploaded. If the folder doesn't exist before, a new folder is created.
isPrivateFile	Boolean	Optional. Accepts `true` of `false`. The default value is `false`. Specify whether to mark the file as private or not. This is only relevant for image type files
customCoordinates	String	Optional. Define an important area in the image. This is only relevant for image type files. To be passed as a string with the `x` and `y` coordinates of the top-left corner, and `width` and `height` of the area of interest in format `x,y,width,height`. For example - `10,10,100,100`
responseFields	Array of string	Optional. Values of the fields that you want upload API to return in the response. For example, set the value of this field to `["tags", "customCoordinates", "isPrivateFile"]` to get value of `tags`, `customCoordinates`, and `isPrivateFile` in the response.
progress	((Progress) -> Void)	Optional.
completion	(Result<(HTTPURLResponse?, UploadAPIResponse?), Error>) -> Void	Required.

Sample Usage

ImageKit.shared.uploader().upload(
  file: image,
  fileName: "sample-image.jpg",
  useUniqueFilename: true,
  tags: ["demo"],
  folder: "/",
  isPrivateFile: false,
  customCoordinates: "",
  responseFields: "",
  signatureHeaders: ["x-test-header":"Test"],
  progress: { progress in
  	// Handle Progress
  },
  completion: { result in 
  	 switch result{
            case .success(let uploadAPIResponse):
                // Handle Success Response
            case .failure(let error as UploadAPIError):
                // Handle Upload Error
            case .failure(let error):
                // Handle Other Errors
      }
  }
)

Support

For any feedback or to report any issues or general implementation support, please reach out to [email protected]

Links

License

Released under the MIT license.

Name		Name	Last commit message	Last commit date
Latest commit History 99 Commits
.github		.github
Example		Example
ImageKit		ImageKit
Server		Server
Tests		Tests
.gitignore		.gitignore
.travis.yml		.travis.yml
ImageKitIO.podspec		ImageKitIO.podspec
LICENSE		LICENSE
README.md		README.md
_Pods.xcodeproj		_Pods.xcodeproj

License

imagekit-developer/imagekit-ios

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ImageKit.io iOS SDK

Installation

Requirements

CocoaPods

Usage

Initialization

Quick Examples

URL construction

Using image path

Using full image URL

Using a custom parameter

Upload file from UIImage

Upload file from a remote URL

Upload file using Data

Demo application

Components

ImageKit

Constructing Image URLs

Basic Examples

List of supported transformations

File Upload

Support

Links

License

About

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