ios - xamarin Ios 将 UIView 添加到 ContainerView

Question

我需要帮助对齐 ContainerView 中的 subview 。我试图添加约束，但它搞砸了一切，所以我尝试了 FluentLayout (https://github.com/FluentLayout/Cirrious.FluentLayout)

我的代码如下所示:

public override void ViewDidLoad()
        {

            SFCalendar calendar = new SFCalendar();
            containerView.AddSubview(calendar);

            containerView.AtBottomOf(this.View);
            containerView.AtTopOf(this.View);
            containerView.WithSameWidth(this.View);

            calendar.AtBottomOf(containerView);
            calendar.AtTopOf(containerView);
            calendar.WithSameWidth(containerView);
        }

但最后我的日历被切断了一点，我在这里做错了什么？

Answer 1

在使用自动布局之前，您应该禁用 TranslatesAutoresizingMaskIntoConstraints .因此，将这两个控件属性设置为 False 会产生影响，此外，您应该更正您的用法:

containerView.TranslatesAutoresizingMaskIntoConstraints = false;

SFCalendar calendar = new SFCalendar();
containerView.AddSubview(calendar);

calendar.TranslatesAutoresizingMaskIntoConstraints = false;

View.AddConstraints(containerView.AtBottomOf(this.View),
containerView.AtTopOf(this.View),
containerView.WithSameWidth(this.View));


containerView.AddConstraints(calendar.AtBottomOf(containerView),
calendar.AtTopOf(containerView),
calendar.WithSameWidth(containerView));

但我建议您使用 native 约束来执行此操作，而且您似乎也想这样做 containerView全屏。添加其前导、尾随、顶部、底部会更好:

SFCalendar calendar = new SFCalendar();
containerView.AddSubview(calendar);

containerView.TranslatesAutoresizingMaskIntoConstraints = false;
containerView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor).Active = true;
containerView.TopAnchor.ConstraintEqualTo(TopLayoutGuide.GetBottomAnchor()).Active = true;
containerView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor).Active = true;
containerView.BottomAnchor.ConstraintEqualTo(BottomLayoutGuide.GetTopAnchor()).Active = true;

calendar.TranslatesAutoresizingMaskIntoConstraints = false;
calendar.LeadingAnchor.ConstraintEqualTo(containerView.LeadingAnchor).Active = true;
calendar.TopAnchor.ConstraintEqualTo(containerView.TopAnchor).Active = true;
calendar.TrailingAnchor.ConstraintEqualTo(containerView.TrailingAnchor).Active = true;
calendar.BottomAnchor.ConstraintEqualTo(containerView.BottomAnchor).Active = true;