feat: 支持 toast

assets/prefabs/Toast.ts

@@ -0,0 +1,49 @@
+import { _decorator, Component, Label, tween, UIOpacity } from 'cc';
+const { ccclass, property } = _decorator;
+
+@ccclass('Toast')
+export class Toast extends Component {
+    @property(Label)
+    contentLabel: Label | null = null;
+
+    private _uiOpacity: UIOpacity | null = null;
+
+    onLoad() {
+        // 获取或添加 UIOpacity 组件用于透明度动画
+        this._uiOpacity = this.node.getComponent(UIOpacity);
+        if (!this._uiOpacity) {
+            this._uiOpacity = this.node.addComponent(UIOpacity);
+        }
+    }
+
+    /**
+     * 显示 Toast
+     * @param content 提示内容
+     * @param duration 显示时长（毫秒），默认 2000ms
+     */
+    show(content: string, duration: number = 2000): void {
+        if (this.contentLabel) {
+            this.contentLabel.string = content;
+        }
+
+        // 重置透明度
+        this._uiOpacity!.opacity = 255;
+
+        // 延迟后执行渐隐动画
+        this.scheduleOnce(() => {
+            this._fadeOut();
+        }, duration / 1000);
+    }
+
+    /**
+     * 渐隐动画并销毁
+     */
+    private _fadeOut(): void {
+        tween(this._uiOpacity!)
+            .to(0.3, { opacity: 0 })
+            .call(() => {
+                this.node.destroy();
+            })
+            .start();
+    }
+}