我从相机获取UIimages并将其分配给UIImageViews以显示。当我这样做时,相机会给我一张1200 x 1600像素的图片,然后我将其分配给应用程序中的UIImageView。在这种情况下,图片如预期地显示在图像视图中。但是,当我尝试在将检索到的UIImage分配给UIImageView之前调整大小时,图像会按预期进行调整大小,但是在某个地方(在调整大小代码中?)我的UIImage会旋转... 因此,当我将调整大小后的UIImage分配给UIImageView时,图像会旋转90度,并且显示为拉伸的状态,因为纵横比(1200 x 1600像素)没有改变...
我正在使用以下方法从相机获取UIImage:
- (void) imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
myImg = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
myResizedImg = [self resizeImage:myImg width:400 height:533];
[myImageView setImage:myResizedImg];
}
我正在使用这个来进行调整大小:
-(UIImage *)resizeImage:(UIImage *)anImage width:(int)width height:(int)height
{
CGImageRef imageRef = [anImage CGImage];
CGImageAlphaInfo alphaInfo = CGImageGetAlphaInfo(imageRef);
if (alphaInfo == kCGImageAlphaNone)
alphaInfo = kCGImageAlphaNoneSkipLast;
CGContextRef bitmap = CGBitmapContextCreate(NULL, width, height, CGImageGetBitsPerComponent(imageRef), 4 * width, CGImageGetColorSpace(imageRef), alphaInfo);
CGContextDrawImage(bitmap, CGRectMake(0, 0, width, height), imageRef);
CGImageRef ref = CGBitmapContextCreateImage(bitmap);
UIImage *result = [UIImage imageWithCGImage:ref];
CGContextRelease(bitmap);
CGImageRelease(ref);
return result;
}
问题:如何在不旋转像素的情况下调整从相机中获取的UIImage的大小?