UIImageJPEGRepresentation和UIImagePNGRepresentation在iOS 13中返回nil [英] UIImageJPEGRepresentation and UIImagePNGRepresentation returns nil in iOS 13

问题描述

在我的应用中，我正在使用图像选择器在iPhone上选择图像.选择图像后，我将执行以下操作:

In my app I'm using the image picker to select an image on an iPhone. After the image was selected, I do:

data = UIImageJPEGRepresentation(image, 1.0);

在iOS 12.4.1及更低版本上，如果我选择PNG或JPEG图像，一切都可以正常工作.

On iOS 12.4.1 and below, everything works fine, if I pick either PNG or JPEG image.

在iOS 13上，JPG可以正常工作，但PNG不能.

On iOS 13, JPG works fine, but PNG does not.

如果我选择JPG:

data = UIImageJPEGRepresentation(image, 1.0); // works
data = UIImagePNGRepresentation(image); // works

但是，如果我选择了PNG:

But if I pick a PNG:

data = UIImageJPEGRepresentation(image, 1.0); // data is nil
data = UIImagePNGRepresentation(image); // data is nil

我在这里查看了其他一些问题，并尝试复制图像:

I looked at some other questions here and tried copying the image:

UIGraphicsBeginImageContext(image.size);
[image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

然后，当我这样做

data = UIImageJPEGRepresentation(newImage, 1.0);

这不是零，但我得到的是全白图像.

it's not nil, but I get an all-white image.

有人对此有解决方法的想法吗?

Does anyone have an idea for a workaround for this?

推荐答案

此问题已在beta 13.1中得以解决.

This issue is solved in beta 13.1.

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