ios – 如何设置使用UIImagePickerController拍摄的照片进行查看/修改为自定义UIViewController？

首先为UIImageview创建IBOutlet.

-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSString *mediaType = info[UIImagePickerControllerMediaType];

    [self dismissviewControllerAnimated:YES completion:nil];


    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        OriginalImage=info[UIImagePickerControllerOriginalImage];
        image = info[UIImagePickerControllerOriginalImage];
//----------
            imageview.image = image; // additional method
            [self resizeImage];


//---------
        if (_newMedia)
            UIImageWriteToSavedPhotosAlbum(image,self,@SELEctor(image:finishedSavingWithError:contexTinfo:),nil);

    }
    else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
    {
        // Code here to support video if enabled
    }

}



//---- Resize the original image ----------------------
-(void)resizeImage
{

        UIImage *resizeImage = imageview.image;

        float width = 320;
        float height = 320;

        CGSize newSize = CGSizeMake(320,320);
        UIGraphicsBeginImageContextWithOptions(newSize,NO,0.0);
        CGRect rect = CGRectMake(0,width,height);

        float widthRatio = resizeImage.size.width / width;
        float heightRatio = resizeImage.size.height / height;
        float divisor = widthRatio > heightRatio ? widthRatio : heightRatio;

        width = resizeImage.size.width / divisor;
        height = resizeImage.size.height / divisor;

        rect.size.width  = width;
        rect.size.height = height;

        //indent in case of width or height difference
        float offset = (width - height) / 2;
        if (offset > 0) {
            rect.origin.y = offset;
        }
        else {
            rect.origin.x = -offset;
        }

        [resizeImage drawInRect: rect];

        UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

    imageview.image = smallImage;
    imageview.contentMode = UIViewContentModeScaleAspectFit;
}