参考
UIKIT_STATIC_INLINE CGRect UIEdgeInsetsInsetRect(CGRect rect, UIEdgeInsets insets) {
rect.origin.x += insets.left;
rect.origin.y += insets.top;
rect.size.width -= (insets.left + insets.right);
rect.size.height -= (insets.top + insets.bottom);
return rect;
}
例子
CGRect rect = UIEdgeInsetsInsetRect(self.bounds, self.textContainerInset);