RSKImageCropper - GitLite

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RSKImageCropper

(★ 2,449)

An image / photo crop view controller for iOS like in the Contacts app with support for landscape orientation.

File Explorer

Download Latest Version (.zip)

- - main.yml
- - LaunchScreen.xib
  - main.m
  - RSKAppDelegate.h
  - RSKAppDelegate.m
  - RSKExampleViewController.h
  - RSKExampleViewController.m
  - RSKImageCropperExample-Info.plist
  - RSKImageCropperExample-Prefix.pch
- - project.pbxproj
- - RSKImageCropperExample-Prefix.pch
  - RSKImageCropperExampleTests-Info.plist
  - RSKImageCropperPerformanceTests.m
  - RSKImageCropViewControllerTests.m
  - RSKImageScrollViewTests.m
  - RSKTouchViewTests.m
- CGGeometry+RSKImageCropper.h
- CGGeometry+RSKImageCropper.m
- RSKImageCropper.h
- RSKImageCropper.modulemap
- RSKImageCropViewController+Protected.h
- RSKImageCropViewController.h
- RSKImageCropViewController.m
- RSKImageScrollView.h
- RSKImageScrollView.m
- RSKImageScrollViewDelegate.h
- RSKInternalUtility.h
- RSKInternalUtility.m
- RSKTouchView.h
- RSKTouchView.m
- UIImage+RSKImageCropper.h
- UIImage+RSKImageCropper.m
.gitignore
LICENSE
Makefile
Package.swift
README.md
Screenshot.png

🚀 Installation Guide

1. Get the code

git clone https://github.com/ruslanskorb/RSKImageCropper

Downloads the entire project code from GitHub to your computer.

cd RSKImageCropper

Moves into the project folder you just downloaded.

2. Make

Medium Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Make Usually pre-installed on Linux/macOS. On Windows, install separately (e.g. via MSYS2 or WSL).

make

Compiles the code based on the generated build configuration to produce an executable.

✅ If it finishes without errors, it worked. Try running the generated executable directly.

// repository documentation

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## RSKImageCropper ![CI](https://github.com/ruslanskorb/RSKImageCropper/actions/workflows/main.yml/badge.svg) ![Swift Package Manager](https://img.shields.io/badge/Swift_Package_Manager-compatible-orange?style=flat)

<p align="center">
	<img src="Screenshot.png" alt="Sample">
</p>

An image cropper for iOS like in the Contacts app with support for landscape orientation.

## Installation
*RSKImageCropper requires iOS 12.0 or later.*

### Using [Swift Package Manager](https://swift.org/package-manager/)

1. To add the `RSKImageCropper` package to your Xcode project, select File > Swift Packages > Add Package Dependency and enter the repository URL. 
    
        https://github.com/ruslanskorb/RSKImageCropper.git

## Basic Usage

Import the class header.

``` objective-c
#import <RSKImageCropper/RSKImageCropper.h>
```

Just create a view controller for image cropping and set the delegate.

``` objective-c
- (IBAction)onButtonTouch:(UIButton *)sender
{
    UIImage *image = [UIImage imageNamed:@"image"];
    RSKImageCropViewController *imageCropViewController = [[RSKImageCropViewController alloc] initWithImage:image];
    imageCropViewController.delegate = self;
    [self.navigationController pushViewController:imageCropViewController animated:YES];
}
```

## Delegate

`RSKImageCropViewControllerDelegate` provides three delegate methods. To use them, implement the delegate in your view controller.

```objective-c
@interface ViewController () <RSKImageCropViewControllerDelegate>
```

Then implement the delegate functions.

```objective-c
// Crop image has been canceled.
- (void)imageCropViewControllerDidCancelCrop:(RSKImageCropViewController *)controller
{
    [self.navigationController popViewControllerAnimated:YES];
}

// The original image has been cropped. Additionally provides a rotation angle used to produce image.
- (void)imageCropViewController:(RSKImageCropViewController *)controller
                   didCropImage:(UIImage *)croppedImage
                  usingCropRect:(CGRect)cropRect
                  rotationAngle:(CGFloat)rotationAngle
{
    self.imageView.image = croppedImage;
    [self.navigationController popViewControllerAnimated:YES];
}

// The original image will be cropped.
- (void)imageCropViewController:(RSKImageCropViewController *)controller
                  willCropImage:(UIImage *)originalImage
{
    // Use when `applyMaskToCroppedImage` set to YES.
    [SVProgressHUD show];
}
```

## DataSource

`RSKImageCropViewControllerDataSource` provides three data source methods. The method `imageCropViewControllerCustomMaskRect:` asks the data source for a custom rect for the mask. The method `imageCropViewControllerCustomMaskPath:` asks the data source for a custom path for the mask. The method `imageCropViewControllerCustomMovementRect:` asks the data source for a custom rect in which the image can be moved. To use them, implement the data source in your view controller.

```objective-c
@interface ViewController () <RSKImageCropViewControllerDataSource>
```

Then implement the data source functions.

```objective-c
// Returns a custom rect for the mask.
- (CGRect)imageCropViewControllerCustomMaskRect:(RSKImageCropViewController *)controller
{
    CGSize aspectRatio = CGSizeMake(16.0f, 9.0f);
    
    CGFloat viewWidth = CGRectGetWidth(controller.view.frame);
    CGFloat viewHeight = CGRectGetHeight(controller.view.frame);
    
    CGFloat maskWidth;
    if ([controller isPortraitInterfaceOrientation]) {
        maskWidth = viewWidth;
    } else {
        maskWidth = viewHeight;
    }
    
    CGFloat maskHeight;
    do {
        maskHeight = maskWidth * aspectRatio.height / aspectRatio.width;
        maskWidth -= 1.0f;
    } while (maskHeight != floor(maskHeight));
    maskWidth += 1.0f;
    
    CGSize maskSize = CGSizeMake(maskWidth, maskHeight);
    
    CGRect maskRect = CGRectMake((viewWidth - maskSize.width) * 0.5f,
                                 (viewHeight - maskSize.height) * 0.5f,
                                 maskSize.width,
                                 maskSize.height);
    
    return maskRect;
}

// Returns a custom path for the mask.
- (UIBezierPath *)imageCropViewControllerCustomMaskPath:(RSKImageCropViewController *)controller
{
    CGRect rect = controller.maskRect;
    CGPoint point1 = CGPointMake(CGRectGetMinX(rect), CGRectGetMaxY(rect));
    CGPoint point2 = CGPointMake(CGRectGetMaxX(rect), CGRectGetMaxY(rect));
    CGPoint point3 = CGPointMake(CGRectGetMaxX(rect), CGRectGetMinY(rect));
    CGPoint point4 = CGPointMake(CGRectGetMinX(rect), CGRectGetMinY(rect));
    
    UIBezierPath *rectangle = [UIBezierPath bezierPath];
    [rectangle moveToPoint:point1];
    [rectangle addLineToPoint:point2];
    [rectangle addLineToPoint:point3];
    [rectangle addLineToPoint:point4];
    [rectangle closePath];
    
    return rectangle;
}

// Returns a custom rect in which the image can be moved.
- (CGRect)imageCropViewControllerCustomMovementRect:(RSKImageCropViewController *)controller
{
    if (controller.rotationAngle == 0) {
        return controller.maskRect;
    } else {
        CGRect maskRect = controller.maskRect;
        CGFloat rotationAngle = controller.rotationAngle;
        
        CGRect movementRect = CGRectZero;
        
        movementRect.size.width = CGRectGetWidth(maskRect) * fabs(cos(rotationAngle)) + CGRectGetHeight(maskRect) * fabs(sin(rotationAngle));
        movementRect.size.height = CGRectGetHeight(maskRect) * fabs(cos(rotationAngle)) + CGRectGetWidth(maskRect) * fabs(sin(rotationAngle));
        
        movementRect.origin.x = CGRectGetMinX(maskRect) + (CGRectGetWidth(maskRect) - CGRectGetWidth(movementRect)) * 0.5f;
        movementRect.origin.y = CGRectGetMinY(maskRect) + (CGRectGetHeight(maskRect) - CGRectGetHeight(movementRect)) * 0.5f;
        
        movementRect.origin.x = floor(CGRectGetMinX(movementRect));
        movementRect.origin.y = floor(CGRectGetMinY(movementRect));
        movementRect = CGRectIntegral(movementRect);
        
        return movementRect;
    }
}
```

## Coming Soon

- If you would like to request a new feature, feel free to raise an issue.

## Demo

Build and run the `RSKImageCropperExample` project in Xcode to see `RSKImageCropper` in action.
Have fun. Fork and send pull requests. Figure out hooks for customization.

## Privacy

`RSKImageCropper` doesn't require a privacy manifest. According to [information received from Apple](https://developer.apple.com/forums/thread/746481?answerId=782256022#782256022), we should avoid adding an empty privacy manifest to our frameworks.

## Contact

Ruslan Skorb

- http://github.com/ruslanskorb
- ruslan.skorb@gmail.com

## License

This project is available under the MIT license. See the LICENSE file for more info. Attribution by linking to the [project page](https://github.com/ruslanskorb/RSKImageCropper) is appreciated.