2018-07-05 UIPopoverPresentation

//不建议用这个方法，用下面那个（这个在plus上横屏的时候样式有问题）横屏时popoverview窗口大小异常

/**(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller{

return UIModalPresentationNone; 

} */

//横屏无异常

-(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection{ return UIModalPresentationNone; }