SWIFT
Như Juan Boero viết kiểm tra:
if UIImagePickerController.isSourceTypeAvailable(.camera){ }
Nhưng tôi sẽ thêm kiểm tra khác để xem nếu người dùng cho phép truy cập vào máy ảnh như táo cho thấy trong ví dụ PhotoPicker của họ (PhotoPicker example Objective-C):
* xin lưu ý bạn phải nhập khẩu AVFoundation
let authStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
if authStatus == AVAuthorizationStatus.denied {
// Denied access to camera
// Explain that we need camera access and how to change it.
let dialog = UIAlertController(title: "Unable to access the Camera", message: "To enable access, go to Settings > Privacy > Camera and turn on Camera access for this app.", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)
dialog.addAction(okAction)
self.present(dialog, animated:true, completion:nil)
} else if authStatus == AVAuthorizationStatus.notDetermined { // The user has not yet been presented with the option to grant access to the camera hardware.
// Ask for it.
AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: { (grantd) in
// If access was denied, we do not set the setup error message since access was just denied.
if grantd {
// Allowed access to camera, go ahead and present the UIImagePickerController.
self.showImagePickerForSourceType(sourceType: UIImagePickerControllerSourceType.camera)
}
})
} else {
// Allowed access to camera, go ahead and present the UIImagePickerController.
self.showImagePickerForSourceType(sourceType: UIImagePickerControllerSourceType.camera)
}
func showImagePickerForSourceType(sourceType: UIImagePickerControllerSourceType) {
let myPickerController = UIImagePickerController()
myPickerController.delegate = self;
myPickerController.sourceType = sourceType
self.present(myPickerController, animated: true, completion: nil)
}
Nguồn
2017-05-03 09:12:35
Phiên bản Swift: [Link] (http://stackoverflow.com/a/33697919/1634890) –