CTT/Unity/Assets/ModelView/Mono/UI/ScrollContent.cs

//
// ScrollContent.cs
//
// Author:
//       fjy <jiyuan.feng@live.com>
//
// Copyright (c) 2020 fjy
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using UnityEngine;
using UnityEngine.UI;

namespace libx
{
    public class ScrollContent : MonoBehaviour
    {
        [SerializeField] private ScrollRect scroll;
        [SerializeField] private float speed;

        private void LateUpdate()
        {
            Vector2 size = scroll.content.rect.size;
            Vector2 viewSize = scroll.viewport.rect.size;
            float len = size.y - viewSize.y;
            Vector2 pos = scroll.content.anchoredPosition;
            if (!(pos.y < len)) return;
            pos.y += speed * Time.deltaTime;
            scroll.content.anchoredPosition = pos;
        }
    }
}