如何在 iOS 中以编程方式将图像传递给视图控制器？

Question

我尝试将图像传递给视图控制器，如下所示，

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main_iPad" bundle:nil];
CropViewController *vc = (CropViewController*)[storyboard instantiateViewControllerWithIdentifier:@"CropViewController"];
vc.imageView.image = [UIImage imageWithData:jpegData];
// present
[self presentViewController:vc animated:YES completion:nil];

使用它可以很好地呈现给所需的视图控制器。但是我设置的图像并没有添加到图像视图中。有没有什么办法解决这一问题？为什么会这样？

提前致谢1

Answer 1

应该是：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main_iPad" bundle:nil];
CropViewController *vc = (CropViewController*)[storyboard instantiateViewControllerWithIdentifier:@"CropViewController"];
// present
[self presentViewController:vc animated:YES completion:(^{
    vc.imageView.image = [UIImage imageWithData:jpegData];
})];

VC 的视图层次结构未设置

如何在 iOS 中以编程方式将图像传递给视图控制器？

How to pass an image to a view controller programatically in iOS?

objective-c

storyboard

uiviewcontroller

ios