Warning Attempt to present UIAlertController 0x7fe9bf808ee0 on Vi guoshengboy 2017-12-14 353 阅读1分钟 报错 Warning: Attempt to present <UIAlertController: 0x7fe9bf808ee0> on <ViewController: 0x7fe9bd5091c0> whose view is not in the window hierarchy! 一个控制器的viewDidload还没走完 就presentVC 会报错 也不会弹出控制器
