问题
I know that a question of this type is already asked but I Debugged it in bit detail, and i came to this point that when i switched this flag off
self.picker.showsCameraControls = false
then the custom flash button doesn't respond but if I'll change the flag to
self.picker.showsCameraControls = true
then my custom flash button responding OK, I have check all the delegates and flags but I am not able to pin point the bug, either it is in my code or it is in IOS 10 version, if its in my code then on showing camera controls why my custom flash button changes state of flash and work fine. here is my code for better understanding:
func configureImagePicker(){
self.picker.delegate = self
self.picker.allowsEditing = false
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)
{
self.picker.sourceType = UIImagePickerControllerSourceType.Camera
self.picker.mediaTypes = [kUTTypeImage as String]
}
}
func showImagePicker(){
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){
self.picker.sourceType = UIImagePickerControllerSourceType.Camera
self.picker.showsCameraControls = false
self.picker.delegateController = self
self.picker.delegate = self
self.picker.mediaTypes = [kUTTypeImage as String]
self.picker.allowsEditing = false
if let cameraOverlay = self.picker.cameraOverlayView {
self.createCamerOverlay(cameraOverlay.frame)
self.picker.cameraOverlayView = self.overlayView
self.presentViewController(self.picker, animated: false, completion: {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(Double(0.5)*Double(NSEC_PER_SEC))), dispatch_get_main_queue(), {
if self.picker.cameraDevice == UIImagePickerControllerCameraDevice.Rear && UIImagePickerController.isFlashAvailableForCameraDevice(UIImagePickerControllerCameraDevice.Rear)
{
if Float.init(UIDevice.currentDevice().systemVersion) < 11.0
{
switch(Global.shared.currenFlashOption)
{
case .FlashOff:
self.picker.cameraFlashMode = .Off
let flashImage = UIImage(named: "btn-flash-off")
self.flashButton.setImage(flashImage, forState: UIControlState.Normal)
self.flashButton.setImage(flashImage, forState: UIControlState.Highlighted)
case .FlashAuto:
self.picker.cameraFlashMode = .Auto
let flashImage = UIImage(named: "btn-flash")
self.flashButton.setImage(flashImage, forState: UIControlState.Normal)
self.flashButton.setImage(flashImage, forState: UIControlState.Highlighted)
case .FlashOn:
self.picker.cameraFlashMode = .On
let flashImage = UIImage(named: "btn-flash-on")
self.flashButton.setImage(flashImage, forState: UIControlState.Normal)
self.flashButton.setImage(flashImage, forState: UIControlState.Highlighted)
}
}
else
{
self.picker.cameraFlashMode = UIImagePickerControllerCameraFlashMode.On
}
}
});
});
} else {
print("Camera overlay frame not found. So did not present the controller.")
}
}
else{
let alert = UIAlertView(title: "Error", message: "Camera Not Available", delegate: nil, cancelButtonTitle: "Cancel")
alert.show()
}
}
In short my custom flashmode button is not working on cameraoverlayview. if there is no solution to this problem then please suggest any hack. thanks
回答1:
I've solved my problem with a clumsy hack,
self.picker.showsCameraControls = true
self.picker.cameraFlashMode = .On
self.picker.showsCameraControls = false
It is fast enough to not disturb user with the showing and hiding controls. It Worked!
来源：https://stackoverflow.com/questions/40416737/uiimagepickercontroller-custom-flashmode-button-is-not-working-on-ios-10-swift