ios 调用相机相册后状态栏消失

解决办法，在VC的viewwillappear中加入两行代码，如下：

override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        UIApplication.sharedApplication().statusBarHidden = false
        self.navigationController?.setNavigationBarHidden(false, animated: true)
    }