Swift 从UIImagePickerController获取图像后，UIImageView会旋转iPhone 5的图像

我正在使用UIImagePickerController使用照相机捕获图像。我的应用程序支持的方向是纵向。我看到iPhone5有奇怪的行为。我使用的是Xcode 7和swift 2.0。iPhone5OS版本是8.4。我的应用程序的部署目标是8.0

问题是。 1.对于iPhone5，在捕获图像后，图像将以捕获图像的相应模式显示。但在我按下“使用照片”标准选项后，当图像显示在UIImageView上时，图像会自动向左旋转。不知道为什么。若我从照片库中选择“图像”，则图像不会旋转。我不希望图像被旋转。 我看过类似的文章，有更好的解释和真实的图像，但没有得到回答。 我尝试了这篇文章中几乎所有的快速解决方案：还有其他的文章，但似乎没有任何效果。我使用了shouldAutorotate（）、sFunc_imageFixOrientation（）和从本文添加扩展名

此外，对于这两种设备，在按下“使用照片”选项后，上传图像需要大约10秒钟。能做得更快吗

这是我的密码：

func openCamera（）{

---

这就是我观察到的。当您使用相机拍摄图像时，图像将逆时针旋转90度，图像方向设置为UIImageOrientation。因此，函数sFunc_imageFixOrientation中的代码将不起作用。如果您从照片库中选择图像，则图像将按原样显示

修改后的函数：

    func sFunc_imageFixOrientation(img:UIImage) -> UIImage {

        // We need to calculate the proper transformation to make the image upright.
        // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
        var transform:CGAffineTransform = CGAffineTransformIdentity
        // Rotate image clockwise by 90 degree
        if (img.imageOrientation == UIImageOrientation.Up) {
            transform = CGAffineTransformTranslate(transform, 0, img.size.height);
            transform = CGAffineTransformRotate(transform,  CGFloat(-M_PI_2));
        }

        if (img.imageOrientation == UIImageOrientation.Down
            || img.imageOrientation == UIImageOrientation.DownMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, img.size.height)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI))
        }

        if (img.imageOrientation == UIImageOrientation.Left
            || img.imageOrientation == UIImageOrientation.LeftMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, 0)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI_2))
        }

        if (img.imageOrientation == UIImageOrientation.Right
            || img.imageOrientation == UIImageOrientation.RightMirrored) {

            transform = CGAffineTransformTranslate(transform, 0, img.size.height);
            transform = CGAffineTransformRotate(transform,  CGFloat(-M_PI_2));
        }

        if (img.imageOrientation == UIImageOrientation.UpMirrored
            || img.imageOrientation == UIImageOrientation.DownMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, 0)
            transform = CGAffineTransformScale(transform, -1, 1)
        }

        if (img.imageOrientation == UIImageOrientation.LeftMirrored
            || img.imageOrientation == UIImageOrientation.RightMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.height, 0);
            transform = CGAffineTransformScale(transform, -1, 1);
        }


        // Now we draw the underlying CGImage into a new context, applying the transform
        // calculated above.
        let ctx:CGContextRef = CGBitmapContextCreate(nil, Int(img.size.width), Int(img.size.height),
                                                     CGImageGetBitsPerComponent(img.CGImage), 0,
                                                     CGImageGetColorSpace(img.CGImage),
                                                     CGImageGetBitmapInfo(img.CGImage).rawValue)!;
        CGContextConcatCTM(ctx, transform)


        if (img.imageOrientation == UIImageOrientation.Left
            || img.imageOrientation == UIImageOrientation.LeftMirrored
            || img.imageOrientation == UIImageOrientation.Right
            || img.imageOrientation == UIImageOrientation.RightMirrored
            || img.imageOrientation == UIImageOrientation.Up
            ) {

            CGContextDrawImage(ctx, CGRectMake(0,0,img.size.height,img.size.width), img.CGImage)
        } else {
            CGContextDrawImage(ctx, CGRectMake(0,0,img.size.width,img.size.height), img.CGImage)
        }


        // And now we just create a new UIImage from the drawing context
        let cgimg:CGImageRef = CGBitmapContextCreateImage(ctx)!
        let imgEnd:UIImage = UIImage(CGImage: cgimg)

        return imgEnd
    }
}

只有在从相机拍摄图像时才调用此函数。我知道我的答案并不完美，但如果没有任何结果，您肯定可以尝试

    func sFunc_imageFixOrientation(img:UIImage) -> UIImage {

        // We need to calculate the proper transformation to make the image upright.
        // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
        var transform:CGAffineTransform = CGAffineTransformIdentity
        // Rotate image clockwise by 90 degree
        if (img.imageOrientation == UIImageOrientation.Up) {
            transform = CGAffineTransformTranslate(transform, 0, img.size.height);
            transform = CGAffineTransformRotate(transform,  CGFloat(-M_PI_2));
        }

        if (img.imageOrientation == UIImageOrientation.Down
            || img.imageOrientation == UIImageOrientation.DownMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, img.size.height)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI))
        }

        if (img.imageOrientation == UIImageOrientation.Left
            || img.imageOrientation == UIImageOrientation.LeftMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, 0)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI_2))
        }

        if (img.imageOrientation == UIImageOrientation.Right
            || img.imageOrientation == UIImageOrientation.RightMirrored) {

            transform = CGAffineTransformTranslate(transform, 0, img.size.height);
            transform = CGAffineTransformRotate(transform,  CGFloat(-M_PI_2));
        }

        if (img.imageOrientation == UIImageOrientation.UpMirrored
            || img.imageOrientation == UIImageOrientation.DownMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.width, 0)
            transform = CGAffineTransformScale(transform, -1, 1)
        }

        if (img.imageOrientation == UIImageOrientation.LeftMirrored
            || img.imageOrientation == UIImageOrientation.RightMirrored) {

            transform = CGAffineTransformTranslate(transform, img.size.height, 0);
            transform = CGAffineTransformScale(transform, -1, 1);
        }


        // Now we draw the underlying CGImage into a new context, applying the transform
        // calculated above.
        let ctx:CGContextRef = CGBitmapContextCreate(nil, Int(img.size.width), Int(img.size.height),
                                                     CGImageGetBitsPerComponent(img.CGImage), 0,
                                                     CGImageGetColorSpace(img.CGImage),
                                                     CGImageGetBitmapInfo(img.CGImage).rawValue)!;
        CGContextConcatCTM(ctx, transform)


        if (img.imageOrientation == UIImageOrientation.Left
            || img.imageOrientation == UIImageOrientation.LeftMirrored
            || img.imageOrientation == UIImageOrientation.Right
            || img.imageOrientation == UIImageOrientation.RightMirrored
            || img.imageOrientation == UIImageOrientation.Up
            ) {

            CGContextDrawImage(ctx, CGRectMake(0,0,img.size.height,img.size.width), img.CGImage)
        } else {
            CGContextDrawImage(ctx, CGRectMake(0,0,img.size.width,img.size.height), img.CGImage)
        }


        // And now we just create a new UIImage from the drawing context
        let cgimg:CGImageRef = CGBitmapContextCreateImage(ctx)!
        let imgEnd:UIImage = UIImage(CGImage: cgimg)

        return imgEnd
    }
}