拍照图片上传竖立问题解决~

原文点这, 很详细, 这里只给代码

#import "UIImage+fixOrientation.h"@implementation UIImage (fixOrientation)- (UIImage *)fixOrientation {    if (self.imageOrientation == UIImageOrientationUp) {    //  这是正常的方向        return self;    }    CGAffineTransform transform = CGAffineTransformIdentity;    switch (self.imageOrientation) {        case UIImageOrientationDown:        case UIImageOrientationDownMirrored: {            transform = CGAffineTransformTranslate(transform, self.size.width, self.size.height);            transform = CGAffineTransformRotate(transform, M_PI);        } break;        case UIImageOrientationLeft:        case UIImageOrientationLeftMirrored: {            transform = CGAffineTransformTranslate(transform, self.size.width, 0);            transform = CGAffineTransformRotate(transform, M_PI_2);        } break;        case UIImageOrientationRight:        case UIImageOrientationRightMirrored: {            transform = CGAffineTransformTranslate(transform, 0, self.size.height);            transform = CGAffineTransformRotate(transform, -M_PI_2);        } break;        case UIImageOrientationUp:        case UIImageOrientationUpMirrored:            break;        default:            break;    }    switch (self.imageOrientation) {        case UIImageOrientationUpMirrored:        case UIImageOrientationDownMirrored: {            transform = CGAffineTransformTranslate(transform, self.size.width, 0);            transform = CGAffineTransformScale(transform, -1, 1);        } break;        case UIImageOrientationLeftMirrored:        case UIImageOrientationRightMirrored: {            transform = CGAffineTransformTranslate(transform, self.size.height, 0);            transform = CGAffineTransformScale(transform, -1, 1);        } break;        case UIImageOrientationUp:        case UIImageOrientationDown:        case UIImageOrientationLeft:        case UIImageOrientationRight:            break;        default:            break;    }    CGContextRef ctx = CGBitmapContextCreate(NULL, self.size.width, self.size.height, CGImageGetBitsPerComponent(self.CGImage), 0, CGImageGetColorSpace(self.CGImage), CGImageGetBitmapInfo(self.CGImage));    CGContextConcatCTM(ctx, transform);    switch (self.imageOrientation) {        case UIImageOrientationLeft:        case UIImageOrientationLeftMirrored:        case UIImageOrientationRight:        case UIImageOrientationRightMirrored: {            //  Grr...            CGContextDrawImage(ctx, CGRectMake(0, 0, self.size.height, self.size.width), self.CGImage);        } break;        default: {            CGContextDrawImage(ctx, CGRectMake(0, 0, self.size.width, self.size.height), self.CGImage);        } break;    }    //  and now we just create a new image from the drawing context    CGImageRef imgRef = CGBitmapContextCreateImage(ctx);    UIImage *img = [UIImage imageWithCGImage:imgRef];    CGContextRelease(ctx);    CGImageRelease(imgRef);    return img;}@end