ios - 在iphone sdk中改变图像的颜色

Question

我有一张图片，我想通过编程更改该图片的颜色。

& 我想改变这张图片的颜色

Answer 1

更新:

使用这个方法...

-(UIImage *)imageNamed:(NSString *)name withColor:(UIColor *)color {
    // load the image
    
    UIImage *img = [UIImage imageNamed:name];
    
    // begin a new image context, to draw our colored image onto
    UIGraphicsBeginImageContext(img.size);
    
    // get a reference to that context we created
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    // set the fill color
    [color setFill];
    
    // translate/flip the graphics context (for transforming from CG* coords to UI* coords
    CGContextTranslateCTM(context, 0, img.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);
    
    // set the blend mode to color burn, and the original image
    CGContextSetBlendMode(context, kCGBlendModeColorBurn);
    CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height);
    CGContextDrawImage(context, rect, img.CGImage);
    
    // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle
    CGContextClipToMask(context, rect, img.CGImage);
    CGContextAddRect(context, rect);
    CGContextDrawPath(context,kCGPathFill);
    
    // generate a new UIImage from the graphics context we drew onto
    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    //return the color-burned image
    return coloredImg;
}

像下面这样使用它......

yourImageView.image = [self imageNamed:@"yourImageName" withColor:[UIColor orangeColor]];