mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-12 13:05:41 +03:00
196 lines
7.5 KiB
Markdown
196 lines
7.5 KiB
Markdown
## RSKImageCropper [](https://travis-ci.org/ruslanskorb/RSKImageCropper) [](https://cocoapods.org/pods/RSKImageCropper) [](https://coveralls.io/r/ruslanskorb/RSKImageCropper) [](https://github.com/ruslanskorb/RSKImageCropper)
|
|
|
|
<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 6.0 or later.*
|
|
|
|
### Using [CocoaPods](http://cocoapods.org)
|
|
|
|
1. Add the pod `RSKImageCropper` to your [Podfile](http://guides.cocoapods.org/using/the-podfile.html).
|
|
|
|
pod 'RSKImageCropper'
|
|
|
|
2. Run `pod install` from Terminal, then open your app's `.xcworkspace` file to launch Xcode.
|
|
3. Import the `RSKImageCropper.h` header. Typically, this should be written as `#import <RSKImageCropper/RSKImageCropper.h>`
|
|
|
|
### Using [Carthage](https://github.com/Carthage/Carthage)
|
|
|
|
1. Add the `ruslanskorb/RSKImageCropper` project to your [Cartfile](https://github.com/Carthage/Carthage/blob/master/Documentation/Artifacts.md#cartfile).
|
|
|
|
github "ruslanskorb/RSKImageCropper"
|
|
|
|
2. Run `carthage update`, then follow the [additional steps required](https://github.com/Carthage/Carthage#adding-frameworks-to-an-application) to add the iOS and/or Mac frameworks into your project.
|
|
3. Import the RSKImageCropper framework/module.
|
|
* Using Modules: `@import RSKImageCropper`
|
|
* Without Modules: `#import <RSKImageCropper/RSKImageCropper.h>`
|
|
|
|
## 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 *imageCropVC = [[RSKImageCropViewController alloc] initWithImage:image];
|
|
imageCropVC.delegate = self;
|
|
[self.navigationController pushViewController:imageCropVC 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 a custom rect for the mask. The method `imageCropViewControllerCustomMaskPath:` asks the data source a custom path for the mask. The method `imageCropViewControllerCustomMovementRect:` asks the data source 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 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
|
|
|
|
- http://github.com/ruslanskorb
|
|
- http://twitter.com/ruslanskorb
|
|
- ruslan.skorb@gmail.com
|
|
|
|
## License
|
|
|
|
This project is 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.
|