iPhone - UIImagePickerController 截屏？

发布于 2024-09-15 06:33:06 字数 834 浏览 0 评论 0原文

我正在尝试使用以下代码从我的 uiimagePickerController 获取屏幕截图，

UIGraphicsBeginImageContext(imagePicker.view.bounds.size);
[self.imagePicker.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

它显示除了从相机捕获的内容之外的所有内容，我看到取消按钮，拍照按钮。相机上显示的不是它捕捉到的黑屏，有什么办法可以解决这个问题吗？或者有更好的方法每 1 秒自动从相机捕获图像？

- (void)captureOutput:(AVCaptureOutput *)captureOutput 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
       fromConnection:(AVCaptureConnection *)connection
{ 
    UIImage *image = [self imageFromSampleBuffer:sampleBuffer];
    UIImageView *img = [[UIImageView alloc] initWithImage:image];
    [img setFrame:CGRectMake(0, 0, 320, 480)];
    [self.view addSubview:img];
    [img release];
}

原文

I am trying to use the following code to take screen shots from my uiimagePickerController

UIGraphicsBeginImageContext(imagePicker.view.bounds.size);
[self.imagePicker.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

It shows everything except what is capturing from the camera, i see the cancel button, take photo buttom.
Instead of what is displaying on the camera it's capturing a black screen, is there any way around this? or a better way to automatically capture an image from camera every 1 seconds?

- (void)captureOutput:(AVCaptureOutput *)captureOutput 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
       fromConnection:(AVCaptureConnection *)connection
{ 
    UIImage *image = [self imageFromSampleBuffer:sampleBuffer];
    UIImageView *img = [[UIImageView alloc] initWithImage:image];
    [img setFrame:CGRectMake(0, 0, 320, 480)];
    [self.view addSubview:img];
    [img release];
}

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