iphone - 如何访问 UIImagePickerController 上的相机闪光灯？

Question

我想知道如何使用 UIImagePickerController 在 iPhone 4 上打开相机闪光灯。

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerCameraDeviceFront] == YES)
{
    /// What code here ///
}

else
{
    NoFlash = [[UIAlertView alloc] initWithTitle:@"Uh-Oh"
                                         message:@"Your device doesn't have a flash camera"
                                        delegate:nil
                               cancelButtonTitle:@"mhmm, OK"
                               otherButtonTitles:nil];
    NoFlash.delegate = self;
    [NoFlash show];
    [NoFlash release];
}

我已经在这里阅读了 UIImagePickerController 类引用网页:http://bit.ly/cdAhhB但我没有找到答案。有人可以帮帮我吗？

谢谢

Answer 1

-(void)flashSelected
{

if (PickerController.cameraFlashMode == 
UIImagePickerControllerCameraFlashModeOff) {

    if ([UIImagePickerController 
isFlashAvailableForCameraDevice:UIImagePickerControllerCameraDeviceRear ])

    {
        PickerController.cameraFlashMode = 
UIImagePickerControllerCameraFlashModeOn;
    }
 }
else
 {
    PickerController.cameraFlashMode = 
UIImagePickerControllerCameraFlashModeOff;
 }     
}

交替地..

-(void)_flashToggle
{
if (! [UIImagePickerController isFlashAvailableForCameraDevice:UIImagePickerControllerCameraDeviceRear ])
    return;

if (PickerController.cameraFlashMode == UIImagePickerControllerCameraFlashModeOff)
    PickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
else
    PickerController.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;  
}