使用具有自定义缩放功能的 UIImagePickerController 拍照
我创建了一个带有叠加层的自定义相机控件...
现在我使用滑块缩放图像..
imagePickerController.cameraViewTransform = CGAffineTransformScale(initialTransform,
MainSlider.value, MainSlider.value);
其中initialTransform是初始图像转换... MainSlider 是滑块，我用它来获得从 1 到 4 的缩放级别 因此，每次当我使用 Slider 增加图像时...我会参考初始变换并相应地缩放 Slider 值...
我可以通过这样做进行缩放..但是当我使用
[imagePickerController takePicture];
它拍摄照片时它只给我原始图片..不给我任何 EditedImage ...
这个原始图像与没有缩放时相同... 我想要获得缩放后的图像... 意味着屏幕上显示的任何内容......
我尝试为此找到很多，，，，我知道我们可以使用 GetScreenCapture() 但这可能会导致应用程序被拒绝，并且还会降低图像质量......
I created a custom Camera Control with overlay ...
Now i am zooming image by using Slider by ..
imagePickerController.cameraViewTransform = CGAffineTransformScale(initialTransform,
MainSlider.value, MainSlider.value);
where initialTransform is the initial image transformation ...
MainSlider is slider , which i use to get zoom level from 1 to 4
So each time when i increase image using Slider ... I refer initialTransform and zoom accordingly Slider value ...
I am able to zoom by doing this .. But when i capture photo using
[imagePickerController takePicture];
It gives me Original Picture only .. does not give me any EditedImage ...
This original image is same as without zoom ...
I want to get Image which was zoomed ...
Means whatever showing in screen ...
I try to find a lot for this,,,, I know we can use GetScreenCapture()
but it can be cause of rejection of app and also it lower down the image quality ...
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捕获图像后，您需要对图像应用相同的变换。正如您所注意到的，设置cameraViewTransform只会影响显示。当您应用统一缩放变换（例如缩放）时，这就是数字缩放。您没有增加像素分辨率。您将从相机中获取照片，然后在处理图像时可以将其裁剪/缩放到您想要的尺寸。您应该在后台线程上进行处理，以尽量减少对主线程的干扰。
You need to apply the same transform to the image after it has been captured. Setting
cameraViewTransformwill only affect the display, as you've noticed. When you apply a uniform scaling transform (e.g. to zoom) this is a digital zoom. You are not increasing the pixel resolution. You'll get the pic back from the camera and then you can crop/scale it to the size you want when processing the image. You should do your processing on a background thread to minimize disrupting the main thread.