JBCroppableView is a subclass of UIView built with UIKit and CoreGraphics that adds n points on an UIImageView allowing to modify them by drag & drop to trim the extra space of an image.

Features

• Add an NSArray of specific CGPoints to a UIImageView.
• Add a specific number of points.
• Drag&Drop of the points.
• Crops the UIImage in a UIImageView.
• Respects aspect ratio.
• ARC(Automatic Reference Counting) support.

Installation

• Drag the JBCroppableView/JBCroppableView folder into your project.
• Add the CoreGraphics framework to your project.

Usage

(see example Xcode project in /TestCroping)

With a undefined number of points:

self.pointsView = [[JBCroppableView alloc] initWithImageView:self.image];
[self.pointsView addPoints:9];
[self.view addSubview:self.pointsView];

With a defined array of points:

self.pointsView = [[JBCroppableView alloc] initWithImageView:self.image];
[self.pointsView addPointsAt:@[[NSValue valueWithCGPoint:CGPointMake(10, 10)],
                            [NSValue valueWithCGPoint:CGPointMake(50, 10)],
                            [NSValue valueWithCGPoint:CGPointMake(50, 50)],
                            [NSValue valueWithCGPoint:CGPointMake(10, 50)]]];
[self.view addSubview:self.pointsView];

Get the current position of points:

• (NSArray *)getPoints;

Crop the image:

• (UIImage *)deleteBackgroundOfImage:(UIImageView *)image;

Demo

Credit

Javier Berlana, Mobile One2One