UIPopoverPresentationController 中的箭头 arrow的frame包含在了vc.view中。导致以前正常的布局在iOS 13上错误显示。
so =》
更新布局
使用约束(Masonry)进行布局，就利用mas_safeAreaGuide相关属性即可.e.g.
// way 1
[self.bgView mas_makeConstraints:^(MASConstraintMaker*make){
make.edges.equalTo(self.view.mas_safeAreaLayoutGuide
);
}
];
// way 2
[self.bgView mas_makeConstraints:^(MASConstraintMaker*make){
make.top.equalTo(self.view.mas_safeAreaLayoutGuideTop);
make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom);
make.leading.equalTo(self.view.mas_safeAreaLayoutGuideLeading);
make.trailing.equalTo(self.view.mas_safeAreaLayoutGuideTrailing);
}];
还有就是delegate每次都要设置
