UIImagePickerController编辑图片框大小的问题

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UIImagePickerController编辑图片框大小的问题   

本人照片的ImageView大小为120*145，而UIImagePickerController的图片编辑框为320*320，如图3白线部分，这样编辑出来的图片大小应该是正方形的，所以放到ImageView里会有问题，请问各位大大，这种情况怎么解决？我不想把ImageView的大小改成方的，能否修改编辑框的大小？

1. - (UIImage*)scaleImage:(UIImage*)anImage withEditingInfo:(NSDictionary*)editInfo{
3.     UIImage *newImage;
5.     UIImage *originalImage = [editInfo valueForKey:@"UIImagePickerControllerOriginalImage"];
6.     CGSize originalSize = CGSizeMake(originalImage.size.width, originalImage.size.height);
7.     CGRect originalFrame;
8.     originalFrame.origin = CGPointMake(0,0);
9.     originalFrame.size = originalSize;
11.     CGRect croppingRect = [[editInfo valueForKey:@"UIImagePickerControllerCropRect"] CGRectValue];
12.     CGSize croppingRectSize = CGSizeMake(croppingRect.size.width, croppingRect.size.height);
14.     CGSize croppedScaledImageSize = anImage.size;
16.     float scaledBarClipHeight = 80;
18.     CGSize scaledImageSize;
19.     float scale;
21.     if(!CGSizeEqualToSize(croppedScaledImageSize, originalSize)){
23.         scale = croppedScaledImageSize.width/croppingRectSize.width;
24.         float barClipHeight = scaledBarClipHeight/scale;
26.         croppingRect.origin.y -= barClipHeight;
27.         croppingRect.size.height += (2*barClipHeight);
29.         if(croppingRect.origin.y<=0){
30.             croppingRect.size.height += croppingRect.origin.y;
31.             croppingRect.origin.y=0;
32.         }
34.         if(croppingRect.size.height > (originalSize.height - croppingRect.origin.y)){
35.             croppingRect.size.height = (originalSize.height - croppingRect.origin.y);
36.         }
39.         scaledImageSize = croppingRect.size;
40.         scaledImageSize.width *= scale;
41.         scaledImageSize.height *= scale;
43.         newImage =  [self cropImage:originalImage to:croppingRect andScaleTo:scaledImageSize];
45.     }else{
47.         newImage = originalImage;
49.     }
51.     return newImage;
52. }

1. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
3.     [self dismissModalViewControllerAnimated:YES];
4.     self.myImageView.userInteractionEnabled=YES;
5.     CGRect imageFrame = myImageView.frame;
6.     CGPoint imageCenter = myImageView.center;
7.     UIImage *croppedImage;
10.     NSMutableDictionary *imageDescriptor = [editInfo mutableCopy];
12.     // CGFloat scaleSize = 400.0f;
13.     CGFloat scaleSize = 640.0f;
14.     switch ([picker sourceType]) {
15.             //done
16.         case UIImagePickerControllerSourceTypePhotoLibrary:
17.             croppedImage = [self scaleImage:img withEditingInfo:editInfo];
18.             [imageDescriptor setObject:croppedImage forKey:@"croppedImage"];
19.             break;
22.         case UIImagePickerControllerSourceTypeCamera: {
23.             UIImageOrientation originalOrientation = [[editInfo objectForKey:UIImagePickerControllerOriginalImage] imageOrientation];
24.             if (originalOrientation != UIImageOrientationUp) {
25.                 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
26.                 CGRect origRect;
27.                 [[editInfo objectForKey:UIImagePickerControllerCropRect] getValue:&origRect];
28.                 UIImage *rotatedImage = straightenAndScaleImage([editInfo objectForKey:UIImagePickerControllerOriginalImage], scaleSize);
29.                 CGFloat scale = scaleSize/1600.0f;
30.                 origRect.origin.x *= scale;
31.                 origRect.origin.y *= scale;
32.                 origRect.size.width *= scale;
33.                 origRect.size.height *= scale;
34.                 croppedImage = [self cropImage:rotatedImage to:origRect andScaleTo:CGSizeMake(320, 480)];
35.                 [imageDescriptor setObject:croppedImage forKey:@"croppedImage"];
36.                 [pool drain];
37.             }
38.             else {
39.                 croppedImage = [self scaleImage:img withEditingInfo:editInfo];
40.                 [imageDescriptor setObject:croppedImage forKey:@"croppedImage"];
41.             }
42.         }
43.             break;
45.         case UIImagePickerControllerSourceTypeSavedPhotosAlbum: {
46.             UIImageOrientation originalOrientation = [[editInfo objectForKey:UIImagePickerControllerOriginalImage] imageOrientation];
47.             if (originalOrientation != UIImageOrientationUp) {
48.                 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
49.                 CGRect origRect;
50.                 [[editInfo objectForKey:UIImagePickerControllerCropRect] getValue:&origRect];
51.                 UIImage *rotatedImage = straightenAndScaleImage([editInfo objectForKey:UIImagePickerControllerOriginalImage], scaleSize);
52.                 CGFloat scale = scaleSize/640.0f;
53.                 origRect.origin.x *= scale;
54.                 origRect.origin.y *= scale;
55.                 origRect.size.width *= scale;
56.                 origRect.size.height *= scale;
57.                 croppedImage = [self cropImage:rotatedImage to:origRect andScaleTo:CGSizeMake(320, 480)];
58.                 [imageDescriptor setObject:croppedImage forKey:@"croppedImage"];
59.                 [pool drain];
60.             }
61.             else {
62.                 croppedImage = [self scaleImage:img withEditingInfo:editInfo];
63.                 [imageDescriptor setObject:croppedImage forKey:@"croppedImage"];
64.             }
65.         }
66.             break;
67.         default:
68.             break;
69.     }
71.     imageFrame.size = croppedImage.size;
72.     myImageView.frame = imageFrame;
73.     myImageView.image = [imageDescriptor objectForKey:@"croppedImage"];
74.     myImageView.center = imageCenter;
77. }

转载自:http://www.cocoachina.com/bbs/read.php?tid=33022