xcode - iOS开发xib中横竖屏两种不同布局，使用autoLayout添加的约束无法正常使用？

Question

xib中针对横竖屏做了两个view，横竖屏切换着使用。添加约束的时候，应该怎么添加？已经试过相对四周均为0了，但是横竖屏一切换，显示就出现一些问题。

Answer 1

Sorry, I checked the code again. It was the view association error in my own code. There is no problem with autoLayout. Attached is my approach:

How to rotate the screen:
－ (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {

// Executed when the screen changes from portrait to landscape

    self.view = _hView;
}else{

// Executed when the screen changes from landscape to portrait

    self.view = _vView;
}

}

Answer 2

Look at the size class.
Different constraints can be set for different size categories