ios - UIImagePickerControllerEditedImage 得到零

Question

大家好，我正在使用 UIImagePickerController 进行一些图像编辑。这是 imagePickerController:didFinishPickingMediaWithInfo 中的一些代码:

    UIImage *editedImg = [info objectForKey:UIImagePickerControllerEditedImage];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:editedImg];
    CGRect imgFrm = imgView.frame;
    float rate = imgFrm.size.height / imgFrm.size.width;
    imgFrm.size.width = size;
    imgFrm.size.height = size * rate;
    imgFrm.origin.x = 0;
    imgFrm.origin.y = (size - imgFrm.size.height) / 2;
    [imgView setFrame:imgFrm];

    UIView *cropView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, size, size)];
    [cropView setBackgroundColor:[UIColor blackColor]];
    [cropView addSubview:imgView];

    UIImage *croppedImg = [MyUtil createUIImageFromUIView:cropView];

上面是在size*size的 View 中设置图像，当picker返回的图像高度小于size时，从 View 中绘制图像。

这是 createUIImageFromUIView:(UIView*)view 的代码:

+ (UIImage *)createUIImageFromUIView:(UIView *)view
{

    UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 2.0);

    CGContextRef ctx = UIGraphicsGetCurrentContext();
    [view.layer renderInContext:ctx];

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

    return viewImage;
}

我的问题是:调试时，'editedImg'(定义在第一行)只显示'nil'。但是，下面的代码运行良好。我正确地获取了 corpView(也显示为“nil”)并得到了裁剪后的图像，并且可以将其编码为 base64 编码的字符串以发送到服务器端。 我只是想知道为什么editedImg是nil(由[info objectForKey:UIImagePickerControllerEditedImage]返回，但是当我选择在 Debug模式下打印信息时，控制台中的输出不是nil)？

Answer 1

editdImg 得到 nil，试试:

UIImage *editedImg = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

获取文件大小:

- (long long) fileSizeAtPath:(NSString*) filePath{
  NSFileManager* manager = [NSFileManager defaultManager];
  if ([manager fileExistsAtPath:filePath]){
      return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
  }
  return 0;
}

祝你好运!