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| <!-- src/components/previewImg.vue -->
<!-- ai写的一个图片预览，效果不够理想 -->
<!-- uni.previewImage用不了 -->
<!-- v-viewer用不了 -->
<template>
<div v-if="isVisible" class="preview-container">
<div class="mask" @click="close"></div>
<div class="preview-content">
<img
:src="images[currentIndex]"
@click="rotateImage"
@touchstart="handleTouchStart"
@touchmove="handleTouchMove"
@touchend="handleTouchEnd"
@mousedown="handleMouseDown"
@mousemove="handleMouseMove"
@mouseup="handleMouseUp"
:style="{
transform: `translate(${position.x}px, ${position.y}px) scale(${scale}) rotate(${rotate}deg)`,
width: '100vw',
height: 'auto',
objectFit: 'contain',
transition: isDragging
? 'transform 0.05s ease'
: 'transform 0.05s ease',
}"
/>
<!-- <viewer
:options="{
transition: false,
tooltip: false,
button: false,
navbar: false,
title: false,
toolbar: false,
}"
:images="images"
@inited="inited"
class="viewer"
ref="viewer"
>
<template #default="scope">
<image v-for="src in scope.images" :src="src" :key="src" />
{{ scope.options }}
</template>
</viewer> -->
<!-- <div class="toolbar">
<button @click="zoomIn">放大</button>
<button @click="zoomOut">缩小</button>
<button @click="rotateImage">旋转</button>
</div> -->
</div>
</div>
</template>
<script>
// import 'viewerjs/dist/viewer.css';
// import { component as Viewer } from 'v-viewer';
export default {
props: {
images: {
type: Array,
required: true,
},
initialIndex: {
type: Number,
default: 0,
},
},
// components: {
// Viewer,
// },
data() {
return {
isVisible: false,
currentIndex: this.initialIndex,
scale: 1,
rotate: 0,
position: { x: 0, y: 0 },
lastPosition: { x: 0, y: 0 },
isDragging: false,
touches: [],
initialDistance: 0,
minScale: 1, // 最小缩放比例
maxScale: 3, // 最大缩放比例
};
},
methods: {
// inited(viewer) {
// this.$viewer = viewer;
// },
open(index) {
this.currentIndex = index;
this.isVisible = true;
this.resetImage();
document.body.style.overflow = "hidden";
},
close() {
this.isVisible = false;
document.body.style.overflow = "auto";
},
zoomIn() {
const newScale = Math.min(this.maxScale, this.scale + 0.1);
this.scale = newScale;
},
zoomOut() {
const newScale = Math.max(this.minScale, this.scale - 0.1);
this.scale = newScale;
},
rotateImage() {
return;
this.rotate += 90;
},
handleTouchStart(event) {
this.touches = event.touches;
if (this.touches.length === 2) {
// Pinch gesture started
this.initialDistance = this.getDistance(
this.touches[0],
this.touches[1]
);
} else if (this.touches.length === 1) {
// Drag gesture started
this.isDragging = true;
this.lastPosition = {
x: this.touches[0].clientX - this.position.x,
y: this.touches[0].clientY - this.position.y,
};
}
},
handleTouchMove(event) {
event.preventDefault();
this.touches = event.touches;
if (this.touches.length === 2) {
// Handle pinch zoom with increased sensitivity
const currentDistance = this.getDistance(
this.touches[0],
this.touches[1]
);
const scaleDiff = (currentDistance - this.initialDistance) * 0.015; // 增加灵敏度
const newScale = Math.max(
this.minScale,
Math.min(this.maxScale, this.scale + scaleDiff)
);
this.scale = newScale;
this.initialDistance = currentDistance;
} else if (this.touches.length === 1 && this.isDragging) {
// Handle drag with increased responsiveness
this.position = {
x: this.touches[0].clientX - this.lastPosition.x,
y: this.touches[0].clientY - this.lastPosition.y,
};
}
},
handleTouchEnd() {
this.isDragging = false;
this.touches = [];
},
handleMouseDown(event) {
this.isDragging = true;
this.lastPosition = {
x: event.clientX - this.position.x,
y: event.clientY - this.position.y,
};
},
handleMouseMove(event) {
if (this.isDragging) {
this.position = {
x: event.clientX - this.lastPosition.x,
y: event.clientY - this.lastPosition.y,
};
}
},
handleMouseUp() {
this.isDragging = false;
},
getDistance(touch1, touch2) {
const dx = touch1.clientX - touch2.clientX;
const dy = touch1.clientY - touch2.clientY;
return Math.sqrt(dx * dx + dy * dy);
},
resetImage() {
this.scale = 1;
this.rotate = 0;
this.position = { x: 0, y: 0 };
this.lastPosition = { x: 0, y: 0 };
this.isDragging = false;
this.touches = [];
this.initialDistance = 0;
},
},
};
</script>
<style scoped>
.preview-container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
z-index: 1000;
}
.mask {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 1);
}
.preview-content {
position: relative;
z-index: 1001;
}
img {
max-width: 100vw;
width: 100vw;
height: auto;
object-fit: contain;
cursor: pointer;
user-select: none;
touch-action: none;
}
.toolbar {
position: absolute;
bottom: 20px;
left: 50%;
transform: translateX(-50%);
display: flex;
gap: 10px;
}
button {
padding: 5px 10px;
background-color: #fff;
border: none;
cursor: pointer;
}
</style>
|