自动拍照
我尝试使用 UIImagePicker 和 AVFoundation 自动拍照并将其保存到照片库，但我无法使其工作。
我想在视图出现时拍摄照片，而不向用户显示相机视图，然后将其用作应用程序中的简单图像。
谢谢
I have tried to take a picture and save it to the photo library automatically with UIImagePicker and AVFoundation, but I couldn't make it work.
I would like to take the photo when the view appears, not showing the camera view to the user, and then use it as a simple image in the app.
Thanks
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苹果实际上有一整套专门针对此类内容的指南，“iOS 相机编程主题”，其中有一个“拍摄照片和电影”小节。甚至还有一个示例项目“照片选择器”。以下是拍照按钮的操作方法摘录：
注意：除非
[UIImagePickerController isSourceTypeAvailable:返回 YES，表示设备有摄像头。UIImagePickerControllerSourceTypeCamera]
Apple actually has an entire guide devoted to this sort of thing, "Camera Programming Topics for iOS," with a subsection "Taking Pictures and Movies." There's even a sample project, "Photo Picker." Here's an excerpt, the action method for your take-a-picture button:
Note: It won't work unless
[UIImagePickerController isSourceTypeAvailable:returns YES, indicating that the device has a camera.UIImagePickerControllerSourceTypeCamera]