130 lines
3.9 KiB
Vue
130 lines
3.9 KiB
Vue
<template>
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<!-- 使用 view 作为悬浮球容器，通过绑定 style 进行定位 -->
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<view class="floating-ball" v-show="isShow"
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:style="{ left: ballLeft + 'px', top: ballTop + 'px' }"
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@touchstart="handleTouchStart"
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@touchmove="handleTouchMove"
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@touchend="handleTouchEnd"
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@touchcancel="handleTouchEnd">
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<image class="floating-ball-img" src="/static/index/caigouqingdan.png" />
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</view>
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</template>
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<script setup>
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import { ref, onMounted,defineEmits } from 'vue';
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const props = defineProps({
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isShow: {
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type: Boolean,
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required: true,
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},
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});
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const emit = defineEmits(['clickBall'])
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// 定义悬浮球尺寸和长按阈值
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const ballWidth = 60; // 悬浮球宽度，单位 px，与 CSS 中保持一致
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const ballHeight = 60; // 悬浮球高度
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const longPressThreshold = 300; // 长按时间阈值（毫秒）
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// 悬浮球当前位置
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const ballLeft = ref(1090);
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const ballTop = ref(120);
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// 用于判断是否进入拖动状态
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const isDragging = ref(false);
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// 记录初始按下时坐标以及悬浮球起始位置
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let startTouchX = 0;
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let startTouchY = 0;
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let initialLeft = 0;
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let initialTop = 0;
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let longPressTimer = null;
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// 屏幕尺寸
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let windowWidth = 0;
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let windowHeight = 0;
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onMounted(() => {
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// 获取系统信息，初始化屏幕宽高（uni-app API）
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const res = uni.getSystemInfoSync();
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windowWidth = res.windowWidth;
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windowHeight = res.windowHeight;
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});
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// 触摸开始：记录初始位置，同时启动长按定时器
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function handleTouchStart(e) {
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const touch = e.touches[0];
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startTouchX = touch.clientX;
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startTouchY = touch.clientY;
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initialLeft = ballLeft.value;
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initialTop = ballTop.value;
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// 设置定时器，达到长按后进入拖动状态
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longPressTimer = setTimeout(() => {
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isDragging.value = true;
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}, longPressThreshold);
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}
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// 触摸移动：如果进入拖动状态，则计算新位置，同时限制悬浮球不超出屏幕边界
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function handleTouchMove(e) {
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// 如果尚未进入拖动状态，且手指移动距离较大，则可以提前进入拖动模式
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if (!isDragging.value) {
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const touch = e.touches[0];
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const deltaX = Math.abs(touch.clientX - startTouchX);
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const deltaY = Math.abs(touch.clientY - startTouchY);
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if(deltaX > 5 || deltaY > 5){
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clearTimeout(longPressTimer);
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isDragging.value = true;
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}
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}
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// 正在拖动，更新悬浮球位置
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if(isDragging.value){
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const touch = e.touches[0];
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let newLeft = initialLeft + (touch.clientX - startTouchX);
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let newTop = initialTop + (touch.clientY - startTouchY);
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// 限制左右边界：不让超出屏幕（计算时需要考虑悬浮球自身尺寸）
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newLeft = Math.max(0, Math.min(newLeft, windowWidth - ballWidth));
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// 限制上下边界
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newTop = Math.max(0, Math.min(newTop, windowHeight - ballHeight));
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ballLeft.value = newLeft;
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ballTop.value = newTop;
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}
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}
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// 触摸结束或取消：若未进入拖动状态则视为点击，触发点击处理方法；否则结束拖动状态
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function handleTouchEnd(e) {
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clearTimeout(longPressTimer);
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if(isDragging.value){
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// 拖动结束后重置状态
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isDragging.value = false;
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} else {
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// 非拖动状态下，触发点击事件
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triggerClick();
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}
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}
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// 点击事件处理方法
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function triggerClick() {
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emit('clickBall')
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}
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</script>
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<style lang="less" scoped>
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.floating-ball {
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position: fixed;
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width: 140rpx;
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height: 140rpx;
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border-radius: 50%;
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background: linear-gradient(to bottom right,#3FBBFE,#A541FF);
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border: 2rpx solid #fff;
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z-index: 999;
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display: flex;
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justify-content: center;
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align-items: center;
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/* 可根据需要添加阴影或其他样式 */
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.floating-ball-img{
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width: 70rpx;
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height: 70rpx;
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}
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}
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</style>
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