PMUNOZ08

How to get the current selected Xcode and list installed

Current Selected Xcode

xcode-select

This is the most common way to get the path to the selected instance:

xcrun xcode-select --print-path

PMUNOZ08

//
//  NSDate+Utilities.h
//
//  Created by PEDRO MUÑOZ CABRERA on 15/03/13.
//  Copyright (c) 2013. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSDate (Utilities)

PMUNOZ08

- (UIImage *)negativeImage:(UIImage *)img
{
    // get width and height as integers, since we'll be using them as
    // array subscripts, etc, and this'll save a whole lot of casting
    
    CGImageRef imageRef = [img CGImage];
    int widthI = CGImageGetWidth(imageRef);
    int heightI = CGImageGetHeight(imageRef);
    
    // Create a suitable RGB+alpha bitmap context in BGRA colour space

PMUNOZ08

- (UIImage *)convertToGrayscale:(UIImage*)img {
    
    CGImageRef imageRef = [img CGImage];
    int widthI = CGImageGetWidth(imageRef);
    int heightI = CGImageGetHeight(imageRef);
    
    // the pixels will be painted to this array
    uint32_t *pixels = (uint32_t *) malloc(widthI * heightI * sizeof(uint32_t));
    
    // clear the pixels so any transparency is preserved

PMUNOZ08

#import <Foundation/Foundation.h>

@interface NSObject (NSDictionaryRepresentation)

/**
 Returns an NSDictionary containing the properties of an object that are not nil.
 */
- (NSDictionary *)dictionaryRepresentation;

@end