UIImage with tint color

UIImage+TintColor.h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface UIImage (TintColor)

- (UIImage *)imageWithOriginalImage:(UIImage *)image
                          tintColor:(UIColor *)tintColor;

@end

NS_ASSUME_NONNULL_END

UIImage+TintColor.m

#import "UIImage+TintColor.h"

@implementation UIImage (TintColor)

- (UIImage *)imageWithOriginalImage:(UIImage *)image
                          tintColor:(UIColor *)tintColor {
#define CASE_1 1

#if CASE_1 == 1
    CIImage *ciImage = [[CIImage alloc] initWithImage:image];
    CIFilter *filter = [CIFilter filterWithName:@"CIMultiplyCompositing"];
    
    // set color
    CIFilter *colorFilter = [CIFilter filterWithName:@"CIConstantColorGenerator"];
    CIColor *ciColor = [[CIColor alloc] initWithColor:tintColor];
    [colorFilter setValue:ciColor forKey:kCIInputColorKey];
    CIImage *colorImage = colorFilter.outputImage;
    
    [filter setValue:colorImage forKey:kCIInputImageKey];
    [filter setValue:ciImage forKey:kCIInputBackgroundImageKey];
    
    // output image
    UIImage *outputImage = [UIImage imageWithCIImage:filter.outputImage scale:image.scale orientation:image.imageOrientation];
    outputImage = [outputImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    return outputImage;
#else
    CIImage *ciImage = [[CIImage alloc] initWithImage:image];
    
    CIFilter *filter = [CIFilter filterWithName:@"CIColorMatrix"];
    
    [filter setValue:ciImage forKey:kCIInputImageKey];
    
    // set color
    CGFloat r, g, b, a;
    [tintColor getRed:&r green:&g blue:&b alpha:&a];
    
    CIVector *rVector = [CIVector vectorWithX:r Y:0 Z:0 W:0];
    CIVector *gVector = [CIVector vectorWithX:0 Y:g Z:0 W:0];
    CIVector *bVector = [CIVector vectorWithX:0 Y:0 Z:b W:0];
    CIVector *aVector = [CIVector vectorWithX:0 Y:0 Z:0 W:a];
    
    [filter setValue:rVector forKey:@"inputRVector"];
    [filter setValue:gVector forKey:@"inputGVector"];
    [filter setValue:bVector forKey:@"inputBVector"];
    [filter setValue:aVector forKey:@"inputAVector"];
    
    // output image
    UIImage *outputImage = [UIImage imageWithCIImage:filter.outputImage
                                               scale:image.scale
                                         orientation:image.imageOrientation];
    outputImage = [outputImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    return outputImage;
#endif
}

@end