iOS - UIImageView - 如何处理UIImage图像方向 [英] iOS - UIImageView - how to handle UIImage image orientation

问题描述

是否可以设置 UIImageView 来处理图像方向？当我将 UIImageView 设置为方向 RIGHT （它是来自相机胶卷的照片）的图像时，图像会向右旋转，但我想以正确的方向显示它，因为它被拍摄了。

Is it possible to setup UIImageView to handle image orientation? When I set the UIImageView to image with orientation RIGHT (it is photo from camera roll), the image is rotated to right, but I want to show it in proper orientation, as it was taken.

我知道我可以旋转图像数据，但它可以做得更优雅吗？

I know I can rotate image data but it is possible to do it more elegant?

谢谢

推荐答案

如果我明白，你想要什么do是无视UIImage的方向？如果是这样，那么你可以这样做：

If I understand, what you want to do is disregard the orientation of the UIImage? If so then you could do this:

UIImage *originalImage = [... whatever ...];

UIImage *imageToDisplay =
     [UIImage imageWithCGImage:[originalImage CGImage]
              scale:[originalImage scale]
              orientation: UIImageOrientationUp];

所以你要创建一个与原始像素数据相同的新UIImage（通过其CGImage引用）但是您指定的方向不会旋转数据。

So you're creating a new UIImage with the same pixel data as the original (referenced via its CGImage property) but you're specifying an orientation that doesn't rotate the data.

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