winterlovesong/RSKImageCropper

RSKImageCropper

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

Installation

CocoaPods is the recommended method of installing RSKImageCropper. Simply add the following line to your Podfile:

Podfile

pod 'RSKImageCropper'

Basic Usage

Import the class header.

#import "RSKImageCropViewController.h"

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

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

Delegate

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

@interface ViewController () <RSKImageCropViewControllerDelegate>

Then implement the delegate functions.

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

// The original image has been cropped.
- (void)imageCropViewController:(RSKImageCropViewController *)controller didCropImage:(UIImage *)croppedImage
{
    self.imageView.image = croppedImage;
    [self.navigationController popViewControllerAnimated:YES];
}

DataSource

RSKImageCropViewControllerDataSource provides two data source methods. The method imageCropViewControllerCustomMaskRect: asks the data source a custom rect for the mask. The method imageCropViewControllerCustomMaskPath: asks the data source a custom path for the mask. To use them, implement the data source in your view controller.

@interface ViewController () <RSKImageCropViewControllerDataSource>

Then implement the data source functions.

// Returns a custom rect for the mask.
- (CGRect)imageCropViewControllerCustomMaskRect:(RSKImageCropViewController *)controller
{
    CGSize maskSize;
    if ([controller isPortraitInterfaceOrientation]) {
        maskSize = CGSizeMake(250, 250);
    } else {
        maskSize = CGSizeMake(220, 220);
    }
    
    CGFloat viewWidth = CGRectGetWidth(controller.view.frame);
    CGFloat viewHeight = CGRectGetHeight(controller.view.frame);
    
    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(CGRectGetMidX(rect), CGRectGetMinY(rect));
    
    UIBezierPath *triangle = [UIBezierPath bezierPath];
    [triangle moveToPoint:point1];
    [triangle addLineToPoint:point2];
    [triangle addLineToPoint:point3];
    [triangle closePath];
    
    return triangle;
}

Coming Soon

If you would like to request a new feature, feel free to raise as 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.

Contact

Ruslan Skorb

License

This project is is available under the MIT license. See the LICENSE file for more info. Attribution by linking to the project page is appreciated.

winterlovesong / RSKImageCropper