设置UIImagePickerController的statusBar颜色

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{    if ([navigationController isKindOfClass:[UIImagePickerController class]] && ((UIImagePickerController *)navigationController).sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {        [[UIApplication sharedApplication] setStatusBarHidden:NO];        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];    }}

首先让当前的ViewController遵循UINavigationControllerDelegate