ios - 适当的 AutoresizingMask

Question

我有一个 View 出现在其父 View 纵向模式的中心，我应该使用什么 autoresizemask 以便它也出现在横向模式的中心。它的大小应该保持不变。我只希望它的原点应该在该点自动移动，以便它出现在中心。有什么帮助吗？

我给了

[parentView setAutoResizesSubview:YES];

parentView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;

Answer 1

// horizontal
childView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;

// vertical
childView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;

// both
childView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;