当Present一个ViewController的时候,pref

在modalPresentationStyle = UIModalPresentationCustom 或 UIModalPresentationOverCurrentContext等non_full screen效果时会出现这情况，苹果提供如下API：

//This controls whether this view controller takes over control of the status bar's appearance when presented non-full screen on another view controller. Defaults to NO.
@property(nonatomic,assign) BOOL modalPresentationCapturesStatusBarAppearance NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;

设置为YES即可。