iOS13 presentViewController的modalPresentationStyle问题

presentViewController的modalPresentationStyle问题:

　　首先我们查看一下UIModalPresentationStyle，对比以前的看看有什么变化没有。发现新增了一个枚举值UIModalPresentationAutomatic，默认的就是这个，所以才会弹出不是全屏的界面。

typedef NS_ENUM(NSInteger, UIModalPresentationStyle) {

    UIModalPresentationFullScreen = 0,

    UIModalPresentationPageSheet API_AVAILABLE(ios(3.2)) API_UNAVAILABLE(tvos),

    UIModalPresentationFormSheet API_AVAILABLE(ios(3.2)) API_UNAVAILABLE(tvos),

    UIModalPresentationCurrentContext API_AVAILABLE(ios(3.2)),

    UIModalPresentationCustom API_AVAILABLE(ios(7.0)),

    UIModalPresentationOverFullScreen API_AVAILABLE(ios(8.0)),

    UIModalPresentationOverCurrentContext API_AVAILABLE(ios(8.0)),

    UIModalPresentationPopover API_AVAILABLE(ios(8.0)) API_UNAVAILABLE(tvos),

    UIModalPresentationBlurOverFullScreen API_AVAILABLE(tvos(11.0)) API_UNAVAILABLE(ios) API_UNAVAILABLE(watchos),

    UIModalPresentationNone API_AVAILABLE(ios(7.0)) = -1,

    UIModalPresentationAutomatic API_AVAILABLE(ios(13.0)) = -2,

};

 

 

　　注意：presentViewController默认的UIModalPresentationAutomatic推出新的VC的时候，原VC不会调用viewWillDisappear与viewDidDisappear方法；退出新VC时，原VC不会调用viewWillAppear与viewDidAppear方法。

　　eg：vcA　　presentViewController　　vcB

　　　　vcA->vcB：vcA不会调用viewWillDisappear与viewDidDisappear方法；

　　　　vcB->vcA：vcA不会调用viewWillAppear与viewDidAppear方法；

 

如果需要vcA 调用 调用viewWillDisappear与viewDidDisappear   修改modalPresentationStylew为UIModalPresentationFullScreen；