在横向中查看时，在纵向拍摄的图像会失真 [英] Image taken in Portrait is distorted when viewed in Landscape

问题描述

我创建了一个视图，其中有一个捕获按钮。当我点击该按钮时，相机屏幕正在打开。但在横向中查看时，以纵向拍摄的图像会失真。
如何在没有失真的情况下获得实际图像？

I have created a view in which there is a capture button. When i click on that button camera screen is opening. but Image taken in Portrait is distorted when viewed in Landscape. How to get actual image without distortion?

推荐答案

如果你在使用ios 5，那么你必须手动调用当您捕获图像并存储到照片中时，此功能。

if you working on the ios 5 then you have to manually call this function when u capture the image and store in to the photos .

 - (UIImage *)fixOrientation : (UIImage *)img
 {
if (img.imageOrientation == UIImageOrientationUp) return img;
CGAffineTransform transform = CGAffineTransformIdentity;

switch (img.imageOrientation) {
    case UIImageOrientationDown:
    case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, img.size.width, img.size.height);
        transform = CGAffineTransformRotate(transform, M_PI);
        break;

    case UIImageOrientationLeft:
    case UIImageOrientationLeftMirrored:
        transform = CGAffineTransformTranslate(transform, img.size.width, 0);
        transform = CGAffineTransformRotate(transform, M_PI_2);
        break;

    case UIImageOrientationRight:
    case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, 0, img.size.height);
        transform = CGAffineTransformRotate(transform, -M_PI_2);
        break;
}

switch (img.imageOrientation) {
    case UIImageOrientationUpMirrored:
    case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, img.size.width, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;

    case UIImageOrientationLeftMirrored:
    case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, img.size.height, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;
}

CGContextRef ctx = CGBitmapContextCreate(NULL, img.size.width, img.size.height,
                                         CGImageGetBitsPerComponent(img.CGImage), 0,
                                         CGImageGetColorSpace(img.CGImage),
                                         CGImageGetBitmapInfo(img.CGImage));
CGContextConcatCTM(ctx, transform);
switch (img.imageOrientation) {
    case UIImageOrientationLeft:
    case UIImageOrientationLeftMirrored:
    case UIImageOrientationRight:
    case UIImageOrientationRightMirrored:
        // Grr...
        CGContextDrawImage(ctx, CGRectMake(0,0,img.size.height,img.size.width), img.CGImage);
        break;

    default:
        CGContextDrawImage(ctx, CGRectMake(0,0,img.size.width,img.size.height), img.CGImage);
        break;
}

CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
UIImage *img1 = [UIImage imageWithCGImage:cgimg];
CGContextRelease(ctx);
CGImageRelease(cgimg);
return img1;

 }




- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
snapimage.image = [self fixOrientation:self.image];

 }
- (void)imagePickerController:(UIImagePickerController *)picker1 
    didFinishPickingImage:(UIImage *)image1
              editingInfo:(NSDictionary *)editingInfo
{

[picker1 dismissModalViewControllerAnimated:YES];
snapimage.image = [self fixOrientation:image1];
 }

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