feat: 增加主题色功能

src/uni_modules/liu-drag-button_1.0.5/components/liu-drag-button/liu-drag-button.vue

@@ -2,6 +2,7 @@
 	<view>
 		<movable-area class="movable-area" :scale-area="false">
 			<movable-view class="movable-view" :class="!isRemove?'animation-info':''" style="pointer-events: auto;"
+                    :style="{ background: background }"
 				@click="clickBtn" @touchstart="touchstart" @touchend="touchend" @change="onChange" direction="all"
 				inertia="true" :x="x" :y="y" :disabled="disabled" :out-of-bounds="true" :damping="200" :friction="100">
 				<slot></slot>
@@ -13,6 +14,10 @@
 <script>
 	export default {
 		props: {
+      background: {
+        type: String,
+        default: "#8b5cf6"
+      },
 			//是否禁用拖动
 			disabled: {
 				type: Boolean,
@@ -110,8 +115,7 @@
 	.movable-view {
 		width: 100rpx;
 		height: 100rpx;
-		background: #8b5cf6;
-    box-shadow: 0px 4rpx 12rpx 0px rgba(139, 92, 246, 0.4);
+    box-shadow: 0px 4rpx 12rpx 0px rgba(15, 23, 42, 0.08);
 		border-radius: 50rpx;
 		color: #FFFFFF;
 		font-size: 26rpx;