使用iOS 8的UIImagePickerController cameraViewTransform没有缩放 [英] UIImagePickerController using iOS 8 cameraViewTransform isn't scaling

问题描述

我之前解决了相机叠加问题：喜欢这个

I have previously solved a camera overlay issue: like this

CGSize screenBounds = [UIScreen mainScreen].bounds.size;

CGFloat cameraAspectRatio = 4.0f/3.0f;

CGFloat camViewHeight = screenBounds.width * cameraAspectRatio;
CGFloat scale = screenBounds.height / camViewHeight;

self.picker.cameraViewTransform = CGAffineTransformMakeTranslation(0, (screenBounds.height - camViewHeight) / 2.0);
self.picker.cameraViewTransform = CGAffineTransformScale(self.picker.cameraViewTransform, scale, scale);

但现在在iOS 8中，实时照片预览的底部再次出现黑条。因此这样的缩放不再有效：

but now in iOS 8 there's a black bar a the bottom of the live photo preview again. so scaling like this no longer works:

self.picker.cameraViewTransform = CGAffineTransformScale(self.picker.cameraViewTransform, scale, scale);

我无法缩放cameraViewTransform。有关如何使用iOS 8的任何想法？这是否被弃用？

I'm not able to scale the cameraViewTransform. Any ideas on how to get this to work with iOS 8? Has this been deprecated?

推荐答案

在iOS 8中，如果要填充屏幕，则不再需要缩放。因此，您要做的独特之处是评论作业：

In iOS 8 you no longer need to scale if you want to fill the screen. So the unique thing you have to do is to comment the assignment:

// self.picker.cameraViewTransform

//self.picker.cameraViewTransform

也就是说，self.picker.cameraViewTransform = CGAffineTransformMakeScale（1.0,1.0）会自动符合self.picker.view.frame。

That is to say, self.picker.cameraViewTransform = CGAffineTransformMakeScale(1.0, 1.0) conforms to self.picker.view.frame automatically.

总之，工作是已由UIImagePickerController为您完成。

In conclusion, the work is already done for you by UIImagePickerController.

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