将闪光灯模式默认设置为关闭

- (void)getMediaFromSource:(UIImagePickerControllerSourceType)sourceType {
NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:sourceType];
if ([UIImagePickerController isSourceTypeAvailable:
     sourceType] && [mediaTypes count] > 0) {
    NSArray *mediaTypes = [UIImagePickerController
                           availableMediaTypesForSourceType:sourceType];
    mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, nil];
    UIImagePickerController *picker =
    [[UIImagePickerController alloc] init];
    UIImagePickerControllerCameraDevice *device;
    picker.mediaTypes = mediaTypes;
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = sourceType;
    [self presentModalViewController:picker animated:YES];
    [picker release];
}}