如何更改UIImage的颜色 [英] How to change the color of an UIImage

问题描述

我不想改变UIImage的backgroundColor，而是改变整个图像的颜色。

I want not to change the backgroundColor of an UIImage,
but rather to change the color of the whole image.

因为我有标准表格，我可以从popover移动到视图。

在我的应用程序中，可以将图像修改为一个大图像，即一张桌子。

此外我希望将颜色改为白褐色或其他什么。

Because I have got standard forms which I can move from popover to the view.
In my App it is possible to tinker the images to one big image, i.e a table.
Moreover I want change the color to white brown or what else.

但问题是：我只能更改backgroundColor

有没有办法改变UIImage的颜色？

But the problem is: I can only change the backgroundColor
Is there any way to change the color of the UIImage?

提前谢谢

推荐答案

UIImage *image = [UIImage imageNamed:@"triangle.png"];

CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextClipToMask(context, rect, image.CGImage);
CGContextSetFillColorWithColor(context, [[UIColor redColor] CGColor]);
CGContextFillRect(context, rect);
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

UIImage *flippedImage = [UIImage imageWithCGImage:img.CGImage 
                                            scale:1.0 orientation: UIImageOrientationDownMirrored];

yourUIImageView.image = flippedImage;

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