UIImagePickerController选择图片发送后旋转90度的问题

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1. -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  
2. {  
3.     NSString *type = [info objectForKey:UIImagePickerControllerMediaType];  
4.     if ([type isEqualToString:@"public.image"]) {  
5.         UIImage* image=[info objectForKey:UIImagePickerControllerOriginalImage];  
6.         UIImageOrientation imageOrientation=image.imageOrientation;  
7.         if(imageOrientation!=UIImageOrientationUp)  
8.         {  
9.             // 原始图片可以根据照相时的角度来显示，但UIImage无法判定，于是出现获取的图片会向左转９０度的现象。  
10.             // 以下为调整图片角度的部分  
11.             UIGraphicsBeginImageContext(image.size);  
12.             [image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];  
13.             image = UIGraphicsGetImageFromCurrentImageContext();  
14.             UIGraphicsEndImageContext();  
15.             // 调整图片角度完毕  
16.         }  
17.         [picker dismissViewControllerAnimated:YES completion:nil];  
18.     }  
19. }  

这里判断了UIImageOrientation属性，如果不是UIImageOrientationUp属性则对图片进行重绘