Mantis

Mantis is a swift 5.0 library that mimics most interactions in the Photos.app on an iOS device. You can use the CropViewController of Mantis with default buttons, or you can add your own buttons under the "customized" mode.

Credits

The crop and rotation feature are strongly inspired by TOCropViewController and IGRPhotoTweaks.

The rotation dial is inspired by 10clock

Requirements

iOS 11.0+
Xcode 10.0+

Install

CocoaPods

pod 'Mantis', '~> 0.43'

Usage

Create a cropViewController in Mantis with default config and default mode

You need set (cropViewController or its navigation controller).modalPresentationStyle = .fullscreen for iOS 13 when the cropViewController is presented

let cropViewController = Mantis.cropViewController(image: <Your Image>)

The caller needs to conform CropViewControllerDelegate

public protocol CropViewControllerDelegate: class {
    func cropViewControllerDidCrop(_ cropViewController: CropViewController, cropped: UIImage)
    func cropViewControllerDidFailToCrop(_ cropViewController: CropViewController, original: UIImage) // optional
    func cropViewControllerDidCancel(_ cropViewController: CropViewController, original: UIImage) // optional
    func cropViewControllerWillDismiss(_ cropViewController: CropViewController) // optional
}

CropViewController has two modes:
- normal mode
In normal mode, you can use a set of standard CropViewController photo editing features.

let cropViewController = Mantis.cropViewController(image: <Your Image>)

customizable mode

This mode includes the standard cropping feature, while enabling users to customize other edit features.

let cropViewController = Mantis.cropCustomizableViewController(image: <Your Image>)

Add your own ratio

            // Add a custom ratio 1:2 for portrait orientation
            let config = Mantis.Config()
            config.addCustomRatio(byVerticalWidth: 1, andVerticalHeight: 2)            
            <Your Crop ViewController> = Mantis.cropViewController(image: <Your Image>, config: config)
            
            // Set the ratioOptions of the config if you don't want to keep all default ratios
            let config = Mantis.Config() 
            //config.ratioOptions = [.original, .square, .custom]
            config.ratioOptions = [.custom]
            config.addCustomRatio(byVerticalWidth: 1, andVerticalHeight: 2)            
            <Your Crop ViewController> = Mantis.cropViewController(image: <Your Image>, config: config)

If you always want to use only one fixed ratio, set Mantis.Config.presetFixedRatioType = alwaysUsingOnePresetFixedRatio

    <Your Crop ViewController>.config.presetFixedRatioType = .alwaysUsingOnePresetFixedRatio(ratio: 16.0 / 9.0)

When choose alwaysUsingOnePresetFixedRatio, fixed-ratio setting button does not show.

If you want to hide rotation dial, set Mantis.Config.showRotationDial = false

Demo code

        let cropViewController = Mantis.cropViewController(image: <Your Image>)
        cropViewController.delegate = self
        <Your ViewController>.present(cropViewController, animated: true)

Icons made by Freepik from www.flaticon.com is licensed by CC 3.0 BY

jvcleave / Mantis