Hi all,
This category takes an image (presumably flat and solid-colored, like a toolbar icon), and fills its non-transparent pixels with a given color. You can optionally also specify a fractional opacity at which to composite the original image over the color-filled region, to give a tinting effect.
This is very useful for generating multiple different-colored versions of the same image, for example 'disabled' or 'highlighted' states of the same basic image, without having to make multiple different-colored bitmap image files.
So, Just make two different files named as : "UIImage+Tint.h" and "UIImage+Tint.m"
1) For "UIImage+Tint.h" contents will be ..
#import <UIKit/UIKit.h>
@interface UIImage (ImageTint)
- (UIImage *)imageTintedWithColor:(UIColor *)color;
@end
2) For "UIImage+Tint.m" contents will be ..
#import "UIImage+Tint.h"
@implementation UIImage (ImageTint)
- (UIImage *)imageTintedWithColor:(UIColor *)color
{
if (color) {
// Construct new image the same size as this one.
UIImage *image;
UIGraphicsBeginImageContextWithOptions([self size], NO, 0.0); // 0.0 for scale means "scale for device's main screen".
CGRect rect = CGRectZero;
rect.size = [self size];
// tint the image
[self drawInRect:rect];
[color set];
UIRectFillUsingBlendMode(rect, kCGBlendModeMultiply);
// restore alpha channel
[self drawInRect:rect blendMode:kCGBlendModeDestinationIn alpha:1.0f];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
return self;
}
@end
3) Now you can import "UIImage+Tint.h" file into your class where you want colorful images and do below code.
UIImage *imgMail = [UIImage imageNamed:@"icon_mail.png"];
imgMail = [imgMail imageTintedWithColor:MENU_COLOR]; //Colorful image
Important Note : Images will be preferred transparent only .
Thanks,
Nilesh M. Prajapati
This category takes an image (presumably flat and solid-colored, like a toolbar icon), and fills its non-transparent pixels with a given color. You can optionally also specify a fractional opacity at which to composite the original image over the color-filled region, to give a tinting effect.
This is very useful for generating multiple different-colored versions of the same image, for example 'disabled' or 'highlighted' states of the same basic image, without having to make multiple different-colored bitmap image files.
So, Just make two different files named as : "UIImage+Tint.h" and "UIImage+Tint.m"
1) For "UIImage+Tint.h" contents will be ..
#import <UIKit/UIKit.h>
@interface UIImage (ImageTint)
- (UIImage *)imageTintedWithColor:(UIColor *)color;
@end
2) For "UIImage+Tint.m" contents will be ..
#import "UIImage+Tint.h"
@implementation UIImage (ImageTint)
- (UIImage *)imageTintedWithColor:(UIColor *)color
{
if (color) {
// Construct new image the same size as this one.
UIImage *image;
UIGraphicsBeginImageContextWithOptions([self size], NO, 0.0); // 0.0 for scale means "scale for device's main screen".
CGRect rect = CGRectZero;
rect.size = [self size];
// tint the image
[self drawInRect:rect];
[color set];
UIRectFillUsingBlendMode(rect, kCGBlendModeMultiply);
// restore alpha channel
[self drawInRect:rect blendMode:kCGBlendModeDestinationIn alpha:1.0f];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
return self;
}
@end
3) Now you can import "UIImage+Tint.h" file into your class where you want colorful images and do below code.
UIImage *imgMail = [UIImage imageNamed:@"icon_mail.png"];
imgMail = [imgMail imageTintedWithColor:MENU_COLOR]; //Colorful image
Important Note : Images will be preferred transparent only .
Thanks,
Nilesh M. Prajapati
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