UGUI Text宽度自适应并设置背景

Posted 2023-02-06 天涯过客TYGK

设置文本最佳宽度，该方法调用需要在设置完文本内容之后进行调用

        public int textSizeMinWidth = -1;
        public int textSizeMaxWidth = -1;

        private void SetTextSize()
        
            Text targetText = textView;
            if (textSizeMaxWidth <= 0 || targetText == null )
                return;
            float minWidth = targetText.preferredWidth;

            //宽高都不缩放
            if (targetText.preferredWidth <= textSizeMaxWidth)
            
                if (textSizeMinWidth > 0 && textSizeMinWidth < targetText.preferredWidth)
                
                    targetText.rectTransform.sizeDelta = new Vector2(targetText.preferredWidth, targetText.rectTransform.sizeDelta.y);
                    return;
                
                else return;
            
                
            //宽度缩放，高度不变
            if (targetText.preferredWidth <= textSizeMaxWidth)
            
                targetText.rectTransform.sizeDelta = new Vector2(targetText.preferredWidth, targetText.rectTransform.sizeDelta.y);
                return;
            

            //宽度最大，高度缩放
            //设置最大宽度
            targetText.rectTransform.sizeDelta = new Vector2(textSizeMaxWidth, targetText.rectTransform.sizeDelta.y);
            //设置最优高度
            int textSizeHeight = Mathf.CeilToInt(targetText.preferredHeight);
            targetText.rectTransform.sizeDelta = new Vector2(textSizeMaxWidth, textSizeHeight);
            
        

设置背景图片,localizeText是对语言处理多语言赋值的脚本，给Text组件设置完多语言后，调用事件OnSizeChagned，LocalizeTextBgImage注册改事件，从而触发背景图片显示尺寸刷新

 [RequireComponent(typeof(LocalizeText))]
    public class LocalizeTextBgImage : MonoBehaviour
    
        [SerializeField] RectTransform bgImageTransform;
        
        public Vector4 offset;//背景图片相对文本便宜量 x:left,y:right,z:top,w:bottom
        LocalizeText localText; //
        RectTransform textTransform;

        void Awake()
        
            localText = GetComponent<LocalizeText>();
            textTransform = this.GetComponent<RectTransform>();
            bgImageTransform.pivot = textTransform.pivot;
            bgImageTransform.anchorMax = textTransform.anchorMax;
            bgImageTransform.anchorMin = textTransform.anchorMin;
            localText.OnSizeChagned += SetBgm;
            
        
                 
        /// <summary>
        /// 刷新背景图尺寸,offset 只能用于pivot为（0.5， 0.5）的Text组件，pivot为其他值的需要重新计算anchoredPosition偏移量
        /// </summary>
        void SetBgm()
        
            bgImageTransform.sizeDelta = textTransform.sizeDelta;
            bgImageTransform.position = textTransform.position;
            
            if (offset != Vector4.zero)
            
                Vector2 diffus = bgImageTransform.position - textTransform.position;
                bgImageTransform.sizeDelta = new Vector2(textTransform.sizeDelta.x - offset.x - offset.y, textTransform.sizeDelta.y - offset.z - offset.w);
                bgImageTransform.anchoredPosition = new Vector2(bgImageTransform.anchoredPosition.x + (offset.x - offset.y) / 2, bgImageTransform.anchoredPosition.y + (offset.w - offset.z) / 2);