Blank UIImage with Specified Color

UIImage+Extensions.h

#import <Foundation/Foundation.h>

@interface UIImage (Extensions)

+ (UIImage*)blankImage:(CGSize)_size;
+ (UIImage*)blankImage:(CGSize)_size withColor:(UIColor*)_color;

@end

UIImage+Extensions.m

#import "UIImage+Extensions.h"

@implementation UIImage (Extensions)

+ (UIImage*)blankImage:(CGSize)_size {
    return [self blankImage:_size withColor:[UIColor whiteColor]];
}

+ (UIImage*)blankImage:(CGSize)_size withColor:(UIColor*)_color {
    UIGraphicsBeginImageContext(_size);	
	CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, _color.CGColor);
    CGContextFillRect(context, CGRectMake(0.0, 0.0, _size.width, _size.height));
    UIImage* outputImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return outputImage;
}

@end

UIImageExtensions.h

#import <Foundation/Foundation.h>

@interface UIImage (Extensions)

+ (UIImage*)blankImage:(CGSize)_size;
+ (UIImage*)blankImage:(CGSize)_size withColor:(UIColor*)_color;

@end

UIImageExtensions.m

#import "UIImage+Extensions.h"

@implementation UIImage (Extensions)

+ (UIImage*)blankImage:(CGSize)_size {
    return [self blankImage:_size withColor:[UIColor whiteColor]];
}

+ (UIImage*)blankImage:(CGSize)_size withColor:(UIColor*)_color {
    UIGraphicsBeginImageContext(_size);	
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, _color.CGColor);
    CGContextFillRect(context, CGRectMake(0.0, 0.0, _size.width, _size.height));
    UIImage* outputImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return outputImage;
}

@end