902 lines
29 KiB
Vue
902 lines
29 KiB
Vue
<template>
|
||
<view class="bt-container">
|
||
<!-- <view class="iconfont icon-reset" @click.stop="resetImage"></view> -->
|
||
<view @touchend="onTouchEnd" @touchstart="onTouchStart" class="mainContent">
|
||
<template v-if="imageInfo">
|
||
<image :src="showImagePath" mode="aspectFit" data-type="image" @touchmove.stop.prevent="onImageMove"
|
||
:style="[imageStyle]" class="image"></image>
|
||
<view class="cropper" :style="{
|
||
width: cropperPosition.width + 'px',
|
||
height: cropperPosition.height + 'px',
|
||
left: cropperPosition.left - 1 + 'px',
|
||
top: cropperPosition.top - 1 + 'px',
|
||
transition,
|
||
}">
|
||
<template v-if="showGrid">
|
||
<view class="line row row1"></view>
|
||
<view class="line row row2"></view>
|
||
<view class="line col col1"></view>
|
||
<view class="line col col2"></view>
|
||
</template>
|
||
</view>
|
||
<view @touchmove.stop.prevent="onHandleResize(-1, 0, $event)" class="controller vertical"
|
||
:style="[controllerPosition.left]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(1, 0, $event)" class="controller vertical"
|
||
:style="[controllerPosition.right]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(0, -1, $event)" class="controller horizon"
|
||
:style="[controllerPosition.top]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(0, 1, $event)" class="controller horizon"
|
||
:style="[controllerPosition.bottom]" />
|
||
<template v-if="ratio==0">
|
||
<view @touchmove.stop.prevent="onHandleResize(-1, -1, $event)" class="controller controller_dot"
|
||
:style="[controllerPosition.leftTop]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(1, -1, $event)" class="controller controller_dot"
|
||
:style="[controllerPosition.rightTop]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(-1, 1, $event)" class="controller controller_dot"
|
||
:style="[controllerPosition.leftBottom]" />
|
||
<view @touchmove.stop.prevent="onHandleResize(1, 1, $event)" class="controller controller_dot"
|
||
:style="[controllerPosition.rightBottom]" />
|
||
</template>
|
||
</template>
|
||
</view>
|
||
<view class="slot">
|
||
<slot />
|
||
</view>
|
||
<!-- #ifdef MP-WEIXIN -->
|
||
<canvas v-if="showCanvas" type="2d" class="bt-canvas" :style="{
|
||
width:dSize.width+'px',
|
||
height:dSize.height+'px'
|
||
}"></canvas>
|
||
<!-- #endif -->
|
||
<!-- #ifndef MP-WEIXIN -->
|
||
<canvas v-if="showCanvas" canvas-id="bt-canvas" class="bt-canvas" :style="{
|
||
width:dSize.width+'px',
|
||
height:dSize.height+'px'
|
||
}"></canvas>
|
||
<!-- #endif -->
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
/**
|
||
* better-cropper 图片裁切插件
|
||
*/
|
||
import calcImageSize from "./utils/calcImageSize.js"
|
||
import calcImagePosition from "./utils/calcImagePosition.js"
|
||
import calcCropper from "./utils/calcCropper.js"
|
||
import calcRightAndBottom from "./utils/calcRightAndBottom.js"
|
||
import calcPointDistance from "./utils/calcPointDistance.js"
|
||
import {
|
||
getTouchPoints,
|
||
sleep,
|
||
debounce,
|
||
log
|
||
} from "./utils/tools.js"
|
||
|
||
var startOffsetX = 0,
|
||
startOffsetY = 0,
|
||
startTouchsDistance = 0,
|
||
startChangeLeft = 0,
|
||
startChangeTop = 0,
|
||
startChangeWidth = 0,
|
||
startChangeHeight = 0,
|
||
initScale = 1,
|
||
startTouches = [],
|
||
timer = null;
|
||
export default {
|
||
name: "bt-cropper",
|
||
props: {
|
||
// 图片路径，支持网络路径和本地路径
|
||
imageSrc: {
|
||
type: String,
|
||
default: "",
|
||
required: true
|
||
// validator(value) {
|
||
// if (/^(http:|https:|)\/\//.test(value)) {
|
||
// return true
|
||
// } else {
|
||
// console.warn("图片url似乎不合法")
|
||
// return false
|
||
// }
|
||
// }
|
||
},
|
||
// 输出图片的格式，默认jpg
|
||
fileType: {
|
||
type: String,
|
||
default: "jpg"
|
||
},
|
||
// 生成的图片的宽度
|
||
dWidth: {
|
||
type: Number,
|
||
default: 0
|
||
},
|
||
// 裁切比例，0表示自由
|
||
ratio: {
|
||
type: Number,
|
||
default: 0,
|
||
validator(value) {
|
||
if (typeof value === 'number') {
|
||
if (value < 0) {
|
||
log('裁剪框比例值必须大于零', 'error')
|
||
return false
|
||
}
|
||
} else {
|
||
log('裁剪框比例值必须是数字', 'error')
|
||
return false
|
||
}
|
||
return true
|
||
}
|
||
},
|
||
// 是否展示网格
|
||
showGrid: {
|
||
type: Boolean,
|
||
default: false
|
||
},
|
||
// 图片质量，0-1 越大质量越好
|
||
quality: {
|
||
type: Number,
|
||
default: 1
|
||
},
|
||
// 初始的图片位置
|
||
initPosition: {
|
||
type: Object,
|
||
default () {
|
||
return null
|
||
}
|
||
},
|
||
// 是否压缩图片
|
||
// 注意：这里的压缩指的是用户移动图片展示的那个图片的压缩，
|
||
// 输出图片的质量并不会受到影响，
|
||
// 也就是说，最终输出图片的质量会比裁切时看起来更好
|
||
compress: {
|
||
type: Boolean,
|
||
default: false
|
||
},
|
||
// 是否开启操作结束后自动放大
|
||
autoZoom: {
|
||
type: Boolean,
|
||
default: true
|
||
}
|
||
},
|
||
data() {
|
||
return {
|
||
imageUrl: "",
|
||
imageInfo: null,
|
||
containerRect: "",
|
||
offsetX: 0,
|
||
offsetY: 0,
|
||
changeWidth: 0,
|
||
changeHeight: 0,
|
||
windowWidth: 375,
|
||
dpr: 2,
|
||
forceChangeWidth: 0,
|
||
forceChangeHeight: 0,
|
||
animate: false,
|
||
imgScale: 1,
|
||
imgTranslateX: 0,
|
||
imgTranslateY: 0,
|
||
// 这个变量不要删掉，不然会造成性能严重下降，这是uni-app框架的Bug
|
||
showCanvas: false,
|
||
cropperPosition: {
|
||
left: 0,
|
||
top: 0,
|
||
width: 0,
|
||
height: 0
|
||
},
|
||
// 图片在视图上的位置
|
||
imageBoundingRect: {
|
||
left: 0,
|
||
top: 0,
|
||
width: 0,
|
||
height: 0,
|
||
}
|
||
};
|
||
},
|
||
watch: {
|
||
imageSrc: {
|
||
handler(imageSrc) {
|
||
this.imageUrl = imageSrc
|
||
this.imageInfo = null;
|
||
if (!imageSrc) {
|
||
return
|
||
}
|
||
this.getImageInfo(imageSrc).then(imageInfo => {
|
||
this.imageInfo = imageInfo;
|
||
return this.getContainerRect()
|
||
}).then(rect => {
|
||
this.containerRect = rect;
|
||
this.imageBoundingRect = this.getImageInitRect()
|
||
this.resetImage()
|
||
if (this.ratio == 0) {
|
||
this.cropperPosition = this.getCropperInitPosition()
|
||
}
|
||
return this.imageBoundingRect;
|
||
}).then((imageBoundingRect) => {
|
||
if (this.initPosition) {
|
||
const { left, top, width, height } = this.initPosition
|
||
const ratio = this.imageBoundingRect.width / this.imageInfo.width
|
||
if (left !== undefined) {
|
||
const imgTranslateX = this.cropperPosition.left - imageBoundingRect.left - left * ratio
|
||
this.cropperPosition.left -= imgTranslateX
|
||
}
|
||
if (top !== undefined) {
|
||
const imgTranslateY = this.cropperPosition.top - imageBoundingRect.top - top * ratio
|
||
this.cropperPosition.top -= imgTranslateY
|
||
}!!width && (this.cropperPosition.width = this.initPosition.width * ratio);
|
||
!!height && (this.cropperPosition.height = this.initPosition.height * ratio);
|
||
}
|
||
this.$emit('load')
|
||
}).catch(err => {
|
||
console.error('失败信息', err)
|
||
this.$emit('loadFail', err)
|
||
})
|
||
},
|
||
immediate: true
|
||
},
|
||
ratio: {
|
||
handler(ratio) {
|
||
this.resetCropper()
|
||
this.applyAnim()
|
||
},
|
||
immediate: false
|
||
},
|
||
},
|
||
computed: {
|
||
showImagePath() {
|
||
if (this.imageInfo && this.imageInfo.compressPath) {
|
||
return this.imageInfo.compressPath
|
||
} else {
|
||
return this.imageInfo?.path || ""
|
||
}
|
||
},
|
||
// 生成图片的大小
|
||
dSize() {
|
||
if (this.dWidth > 0) {
|
||
return {
|
||
width: this.dWidth,
|
||
height: this.dWidth * (this.cropperPosition.height / this.cropperPosition.width)
|
||
}
|
||
} else {
|
||
// 原像素比例裁剪
|
||
let scale = 1
|
||
if (this.imageInfo) {
|
||
scale = this.imgScale * this.imageBoundingRect.width / this.imageInfo.width
|
||
}
|
||
return {
|
||
width: this.cropperPosition.width / scale,
|
||
height: this.cropperPosition.height / scale
|
||
}
|
||
}
|
||
},
|
||
imageStyle() {
|
||
let style = {
|
||
left: this.imageBoundingRect.left + 'px',
|
||
top: this.imageBoundingRect.top + 'px',
|
||
width: this.imageBoundingRect.width + 'px',
|
||
height: this.imageBoundingRect.height + 'px',
|
||
transition: this.transition,
|
||
transform: `matrix(${this.imgScale}, 0, 0, ${this.imgScale}, ${this.imgTranslateX}, ${this.imgTranslateY}) translateZ(0px)`,
|
||
}
|
||
return style
|
||
},
|
||
transition() {
|
||
return this.animate ? '0.2s' : 'none'
|
||
},
|
||
// 四个控制点的位置
|
||
controllerPosition() {
|
||
const up40 = uni.upx2px(40),
|
||
up30 = uni.upx2px(30),
|
||
up20 = uni.upx2px(20);
|
||
const transition = this.transition
|
||
return {
|
||
left: {
|
||
left: this.cropperPosition.left - up30 + 'px',
|
||
top: this.cropperPosition.top + (this.cropperPosition.height) / 2 - up40 + 'px',
|
||
transition
|
||
},
|
||
right: {
|
||
left: this.cropperPosition.left + this.cropperPosition.width - up20 + 'px',
|
||
top: this.cropperPosition.top + (this.cropperPosition.height) / 2 - up40 + 'px',
|
||
transition
|
||
},
|
||
top: {
|
||
left: this.cropperPosition.left + this.cropperPosition.width / 2 - up40 + 'px',
|
||
top: this.cropperPosition.top - up30 + 'px',
|
||
transition
|
||
},
|
||
bottom: {
|
||
left: this.cropperPosition.left + this.cropperPosition.width / 2 - up40 + 'px',
|
||
top: this.cropperPosition.top + this.cropperPosition.height - up20 + 'px',
|
||
transition
|
||
},
|
||
leftTop: {
|
||
left: this.cropperPosition.left - up40 + 'px',
|
||
top: this.cropperPosition.top - up40 + 'px',
|
||
transition
|
||
},
|
||
rightTop: {
|
||
left: this.cropperPosition.left + this.cropperPosition.width - up40 + 'px',
|
||
top: this.cropperPosition.top - up40 + 'px',
|
||
transition
|
||
},
|
||
leftBottom: {
|
||
left: this.cropperPosition.left - up40 + 'px',
|
||
top: this.cropperPosition.top + this.cropperPosition.height - up40 + 'px',
|
||
transition
|
||
},
|
||
rightBottom: {
|
||
left: this.cropperPosition.left + this.cropperPosition.width - up40 + 'px',
|
||
top: this.cropperPosition.top + this.cropperPosition.height - up40 + 'px',
|
||
transition
|
||
}
|
||
}
|
||
},
|
||
},
|
||
methods: {
|
||
// 开启动画
|
||
applyAnim() {
|
||
this.animate = true
|
||
clearTimeout(timer)
|
||
timer = setTimeout(() => {
|
||
this.animate = false
|
||
}, 200)
|
||
},
|
||
async getContainerRect() {
|
||
const systemInfo = uni.getSystemInfoSync()
|
||
this.windowWidth = systemInfo.windowWidth
|
||
this.dpr = systemInfo.pixelRatio
|
||
return new Promise(resolve => {
|
||
uni.createSelectorQuery().in(this).select(".mainContent").boundingClientRect((rect) => {
|
||
resolve(rect)
|
||
}).exec()
|
||
})
|
||
},
|
||
async getImageInfo(imageSrc) {
|
||
uni.showLoading({
|
||
title: "获取图片信息"
|
||
})
|
||
return uni.getImageInfo({
|
||
src: imageSrc
|
||
}).then((res) => {
|
||
let imageInfo = null;
|
||
// #ifdef VUE2
|
||
const err = res[0];
|
||
imageInfo = res[1];
|
||
if (err) {
|
||
throw new Error(err)
|
||
}
|
||
// #endif
|
||
// #ifdef VUE3
|
||
imageInfo = res
|
||
// #endif
|
||
uni.hideLoading()
|
||
return imageInfo;
|
||
}).then(imageInfo => {
|
||
const maxSize = 2000 * 2000
|
||
const imageSize = imageInfo.width * imageInfo.height
|
||
// uni.canIUse('compressImage.success.tempFilePath')
|
||
// #ifndef H5
|
||
// 是否压缩图片
|
||
if (maxSize < imageSize && this.compress) {
|
||
const quality = maxSize / imageSize * 100
|
||
return uni.compressImage({
|
||
src: imageInfo.path,
|
||
quality
|
||
}).then(([err, {
|
||
tempFilePath
|
||
}]) => {
|
||
if (!err) {
|
||
imageInfo.compressPath = tempFilePath
|
||
}
|
||
return imageInfo
|
||
})
|
||
}
|
||
// #endif
|
||
return imageInfo;
|
||
}).then(imageInfo => {
|
||
return imageInfo;
|
||
}).catch(err => {
|
||
uni.hideLoading()
|
||
uni.showToast({
|
||
title: "图片加载失败",
|
||
icon: "none"
|
||
})
|
||
throw Error(err)
|
||
})
|
||
},
|
||
getImageInitRect() {
|
||
return calcImageSize(this.imageInfo, this.containerRect)
|
||
},
|
||
resetImage() {
|
||
this.imgTranslateX = 0
|
||
this.imgTranslateY = 0
|
||
this.imgScale = 1
|
||
this.resetCropper()
|
||
},
|
||
// 获取裁剪框初始位置
|
||
getCropperInitPosition() {
|
||
return calcCropper(this.imageBoundingRect, {
|
||
width: this.ratio || 1,
|
||
height: 1
|
||
})
|
||
},
|
||
/**
|
||
* @deprecated 本方法已弃用，请用resetCropper代替
|
||
*/
|
||
resetRatio() {
|
||
log('本方法(resetRatio)已弃用,未来将删除,请用resetCropper代替', 'warn')
|
||
return this.resetCropper()
|
||
},
|
||
// 重置裁剪框
|
||
resetCropper() {
|
||
if (this.imageInfo && this.ratio !== 0) {
|
||
this.cropperPosition = this.getCropperInitPosition()
|
||
this.checkImagePosition()
|
||
}
|
||
},
|
||
onTouchStart(ev) {
|
||
this.animate = false
|
||
if (timer) {
|
||
clearTimeout(timer)
|
||
}
|
||
startTouches = Array.from(ev.touches)
|
||
if (ev.target.dataset.type === 'image') {
|
||
startOffsetX = this.imgTranslateX;
|
||
startOffsetY = this.imgTranslateY;
|
||
if (ev.touches.length == 2) {
|
||
initScale = this.imgScale
|
||
startTouchsDistance = calcPointDistance(...getTouchPoints(startTouches))
|
||
}
|
||
} else {
|
||
startChangeLeft = this.cropperPosition.left
|
||
startChangeTop = this.cropperPosition.top
|
||
startChangeWidth = this.cropperPosition.width;
|
||
startChangeHeight = this.cropperPosition.height;
|
||
}
|
||
},
|
||
onTouchEnd() {
|
||
startTouches = []
|
||
this.checkImagePosition()
|
||
if (this.autoZoom) {
|
||
clearTimeout(timer)
|
||
timer = setTimeout(this.zoom, 1000)
|
||
}
|
||
this.reportChange()
|
||
},
|
||
getImagePosition() {
|
||
return calcImagePosition(this.imageBoundingRect, {
|
||
imgTranslateX: this.imgTranslateX,
|
||
imgTranslateY: this.imgTranslateY,
|
||
imgScale: this.imgScale
|
||
})
|
||
},
|
||
getCropperPosition() {
|
||
return calcRightAndBottom(this.cropperPosition)
|
||
},
|
||
// 检查图片位置
|
||
checkImagePosition() {
|
||
const imagePosition = this.getImagePosition()
|
||
const cropperPosition = this.getCropperPosition()
|
||
// 如果裁剪框大于图像大小，就放大到裁剪框大小
|
||
const widthScale = cropperPosition.width / imagePosition.width
|
||
const heightScale = cropperPosition.height / imagePosition.height
|
||
const scale = Math.max(widthScale, heightScale)
|
||
if (scale > 1) {
|
||
this.imageZoom({
|
||
left: cropperPosition.left + cropperPosition.width / 2,
|
||
top: cropperPosition.top + cropperPosition.height / 2
|
||
}, scale)
|
||
this.applyAnim()
|
||
}
|
||
// 判断是否超出边界
|
||
if (imagePosition.left > cropperPosition.left) {
|
||
this.imgTranslateX = this.imgTranslateX - (imagePosition.left - cropperPosition.left)
|
||
} else if (imagePosition.right < cropperPosition.right) {
|
||
this.imgTranslateX = this.imgTranslateX + (cropperPosition.right - imagePosition.right)
|
||
}
|
||
if (imagePosition.top > cropperPosition.top) {
|
||
this.imgTranslateY = this.imgTranslateY - (imagePosition.top - cropperPosition.top)
|
||
} else if (imagePosition.bottom < cropperPosition.bottom) {
|
||
this.imgTranslateY = this.imgTranslateY + (cropperPosition.bottom - imagePosition.bottom)
|
||
}
|
||
},
|
||
zoom() {
|
||
// 容器比例
|
||
const containerRatio = this.containerRect.width / this.containerRect.height
|
||
// 移动后的裁剪框比例
|
||
const cropperRatio = this.cropperPosition.width / this.cropperPosition.height
|
||
// 放大比例
|
||
let scale = 1
|
||
if (cropperRatio > containerRatio) {
|
||
scale = this.containerRect.width / this.cropperPosition.width
|
||
} else {
|
||
scale = this.containerRect.height / this.cropperPosition.height
|
||
}
|
||
// 放大裁剪框
|
||
this.cropperPosition.width *= scale
|
||
this.cropperPosition.height *= scale
|
||
// // 移动图像
|
||
this.imageZoom({
|
||
left: this.cropperPosition.left,
|
||
top: this.cropperPosition.top
|
||
}, scale)
|
||
// 将裁剪框上下居中
|
||
const cropperTop = (this.containerRect.height - this.cropperPosition.height) / 2
|
||
// 需要上下移动的距离
|
||
const moveTop = cropperTop - this.cropperPosition.top
|
||
// 将裁剪框左右居中
|
||
const cropperLeft = (this.containerRect.width - this.cropperPosition.width) / 2
|
||
// 需要左右移动的距离
|
||
const moveLeft = (cropperLeft - this.cropperPosition.left)
|
||
this.cropperPosition.left = cropperLeft
|
||
this.cropperPosition.top = cropperTop
|
||
|
||
// 移动图像使之与裁剪框对齐
|
||
this.imgTranslateX += moveLeft
|
||
this.imgTranslateY += moveTop
|
||
this.checkImagePosition()
|
||
this.applyAnim()
|
||
},
|
||
// 发送change事件
|
||
reportChange() {
|
||
const imagePosition = this.getImagePosition()
|
||
const cropperPosition = this.getCropperPosition()
|
||
const scale = this.imageBoundingRect.width / this.imageInfo.width * this.imgScale
|
||
this.$emit('change', {
|
||
left: (cropperPosition.left - imagePosition.left) / scale,
|
||
top: (cropperPosition.top - imagePosition.top) / scale,
|
||
width: cropperPosition.width / scale,
|
||
height: cropperPosition.height / scale
|
||
})
|
||
},
|
||
imageZoom(center = {
|
||
left: 0,
|
||
top: 0
|
||
}, scale = 1) {
|
||
const imagePosition = this.getImagePosition()
|
||
this.imgScale = this.imgScale * scale
|
||
const offsetLeftPercent = (center.left - imagePosition.left) / imagePosition.width
|
||
this.imgTranslateX = this.imgTranslateX + imagePosition.width * (scale - 1) / 2 * (1 - offsetLeftPercent *
|
||
2)
|
||
const offsetTopPercent = (center.top - imagePosition.top) / imagePosition.height
|
||
this.imgTranslateY = this.imgTranslateY + imagePosition.height * (scale - 1) / 2 * (1 - offsetTopPercent *
|
||
2)
|
||
},
|
||
onImageMove(ev) {
|
||
if (ev.touches.length == 2 && startTouches.length == 2) {
|
||
const points = getTouchPoints(ev.touches)
|
||
const imgScale = initScale * calcPointDistance(...points) / startTouchsDistance
|
||
this.imageZoom({
|
||
left: this.cropperPosition.left + this.cropperPosition.width / 2,
|
||
top: this.cropperPosition.top + this.cropperPosition.height / 2
|
||
}, imgScale / this.imgScale)
|
||
} else if (ev.touches.length == 1 && startTouches.length == 1) {
|
||
const [startClientX, startClientY] = getTouchPoints(startTouches)[0]
|
||
const [clientX, clientY] = getTouchPoints(ev.touches)[0]
|
||
this.imgTranslateX = startOffsetX + clientX - startClientX
|
||
this.imgTranslateY = startOffsetY + clientY - startClientY
|
||
}
|
||
},
|
||
// 调整裁剪框大小
|
||
onHandleResize(pX, pY, ev) {
|
||
const [startClientX, startClientY] = getTouchPoints(startTouches)[0]
|
||
const [clientX, clientY] = getTouchPoints(ev.touches)[0]
|
||
const cropperBoundingRect = this.getCropperPosition()
|
||
const imageBoundingRect = this.getImagePosition()
|
||
const changeX = clientX - startClientX
|
||
const changeY = clientY - startClientY
|
||
const minSize = {
|
||
width: uni.upx2px(100),
|
||
height: uni.upx2px(100)
|
||
}
|
||
const imageRemainHeight = imageBoundingRect.bottom - cropperBoundingRect.top
|
||
const cropperRemainHeight = this.containerRect.bottom - cropperBoundingRect.top
|
||
const maxHeight = Math.min(imageRemainHeight, cropperRemainHeight)
|
||
const imageRemainWidth = imageBoundingRect.right - cropperBoundingRect.left
|
||
const cropperRemainWidth = this.containerRect.right - cropperBoundingRect.left
|
||
const maxWidth = Math.min(imageRemainWidth, cropperRemainWidth)
|
||
let width = 0
|
||
switch (pX) {
|
||
case 1:
|
||
width = startChangeWidth + changeX
|
||
if (width < maxWidth) {
|
||
if (width > minSize.width) {
|
||
this.cropperPosition.width = width
|
||
}
|
||
}
|
||
break;
|
||
case -1:
|
||
const left = startChangeLeft + changeX
|
||
const minLeft = Math.min(imageBoundingRect.left, cropperBoundingRect.left)
|
||
width = startChangeWidth - changeX
|
||
if (left > minLeft) {
|
||
if (width > minSize.width) {
|
||
this.cropperPosition.left = left
|
||
this.cropperPosition.width = width
|
||
}
|
||
}
|
||
break;
|
||
case 0:
|
||
if (this.ratio != 0)
|
||
this.cropperPosition.width = this.cropperPosition.height * this.ratio
|
||
break
|
||
}
|
||
switch (pY) {
|
||
case 1:
|
||
const height = startChangeHeight + changeY
|
||
if (height < maxHeight && height > minSize.height) {
|
||
this.cropperPosition.height = height
|
||
}
|
||
break;
|
||
case -1:
|
||
const top = startChangeTop + changeY
|
||
const minTop = Math.min(imageBoundingRect.top, cropperBoundingRect.top)
|
||
if (top > minTop) {
|
||
const height = startChangeHeight - changeY
|
||
if (height > minSize.height) {
|
||
this.cropperPosition.top = top
|
||
this.cropperPosition.height = height
|
||
}
|
||
}
|
||
break;
|
||
case 0:
|
||
if (this.ratio != 0)
|
||
this.cropperPosition.height = this.cropperPosition.width / this.ratio;
|
||
break;
|
||
}
|
||
},
|
||
// 开始裁剪
|
||
async crop(images = null) {
|
||
// 批量裁剪，暂时还没实现
|
||
// if (Array.isArray(images) && images.length) {
|
||
// for (item in images) {
|
||
// }
|
||
// return;
|
||
// }
|
||
if (!this.imageInfo) {
|
||
uni.showToast({
|
||
title: "图片尚未载入完成"
|
||
})
|
||
return [new Error("图片尚未载入完成"), null]
|
||
}
|
||
this.showCanvas = true
|
||
this.$emit('cropStart')
|
||
return new Promise(resolve => {
|
||
this.$nextTick(() => {
|
||
this.onCrop().then(res => {
|
||
resolve(res)
|
||
})
|
||
})
|
||
})
|
||
},
|
||
// 开始裁切
|
||
async onCrop() {
|
||
let canvas, image, ctx, err, res;
|
||
// 新版canvas
|
||
// #ifdef MP-WEIXIN
|
||
canvas = await new Promise((resolve) => {
|
||
uni
|
||
.createSelectorQuery().in(this)
|
||
.select(".bt-canvas")
|
||
.node((res) => {
|
||
resolve(res.node);
|
||
})
|
||
.exec();
|
||
});
|
||
log("在小程序模拟器上可能会裁剪失败，真机无此问题，放心使用", "warn")
|
||
image = canvas.createImage();
|
||
image.src = this.imageInfo.path;
|
||
await new Promise((resolve) => (image.onload = resolve));
|
||
canvas.width = this.dSize.width;
|
||
canvas.height = this.dSize.height;
|
||
ctx = canvas.getContext("2d");
|
||
// #endif
|
||
// #ifndef MP-WEIXIN
|
||
image = this.imageInfo.path
|
||
ctx = uni.createCanvasContext("bt-canvas", this)
|
||
// #endif
|
||
const imagePosition = this.getImagePosition()
|
||
const cropperPosition = this.getCropperPosition()
|
||
const scale = imagePosition.width / this.imageInfo.width
|
||
const offsetLeft = (cropperPosition.left - imagePosition.left) / scale
|
||
const offsetTop = (cropperPosition.top - imagePosition.top) / scale
|
||
const cropperWidth = cropperPosition.width / scale
|
||
const cropperHeight = cropperPosition.height / scale
|
||
// console.log('offsetLeft', offsetLeft, 'offsetTop', offsetTop, this.imageInfo)
|
||
ctx.drawImage(
|
||
image,
|
||
offsetLeft,
|
||
offsetTop,
|
||
cropperWidth,
|
||
cropperHeight,
|
||
0,
|
||
0,
|
||
this.dSize.width,
|
||
this.dSize.height
|
||
);
|
||
// #ifndef MP-WEIXIN
|
||
await new Promise((resolve) => ctx.draw(true, resolve));
|
||
// #endif
|
||
// 等待一段时间，不然ios会裁剪失败
|
||
await sleep(200);
|
||
// 在vue3里面，只能写成这种回调形式，否则报错
|
||
[err, res] = await new Promise(resolve => {
|
||
uni.canvasToTempFilePath({
|
||
// #ifdef MP-WEIXIN
|
||
canvas,
|
||
// #endif
|
||
// #ifndef MP-WEIXIN
|
||
canvasId: "bt-canvas",
|
||
// #endif
|
||
fileType: this.fileType,
|
||
destWidth: this.dSize.width,
|
||
destHeight: this.dSize.height,
|
||
quality: this.quality,
|
||
success(res) {
|
||
// console.log("裁剪成功")
|
||
resolve([null, res])
|
||
},
|
||
fail(err) {
|
||
// console.log("裁剪失败", err)
|
||
resolve([err, null])
|
||
},
|
||
complete: () => {
|
||
this.showCanvas = false
|
||
}
|
||
});
|
||
})
|
||
this.$emit('cropEnd', [err, res])
|
||
return [err, res]
|
||
},
|
||
},
|
||
};
|
||
</script>
|
||
|
||
<style lang="scss" scoped>
|
||
@import "./iconfont.css";
|
||
|
||
.bt-container {
|
||
display: flex;
|
||
flex-direction: column;
|
||
justify-content: space-between;
|
||
height: 100%;
|
||
box-sizing: border-box;
|
||
background-color: #0e1319;
|
||
padding-top: 30rpx;
|
||
position: relative;
|
||
overflow: hidden;
|
||
|
||
.iconfont {
|
||
position: absolute;
|
||
z-index: 999;
|
||
top: 40rpx;
|
||
font-size: 30rpx;
|
||
padding: 10rpx;
|
||
background-color: rgba(255, 255, 255, 0.2);
|
||
border-radius: 50%;
|
||
color: #FFFFFF;
|
||
|
||
&.active {
|
||
color: #007AFF;
|
||
}
|
||
}
|
||
|
||
.icon-move {
|
||
right: 100rpx;
|
||
}
|
||
|
||
.icon-reset {
|
||
right: 40rpx;
|
||
}
|
||
|
||
.bt-canvas {
|
||
position: absolute;
|
||
left: 100%;
|
||
top: 0;
|
||
width: 300px;
|
||
height: 300px;
|
||
}
|
||
|
||
.mainContent {
|
||
flex: 1;
|
||
margin: 60rpx 60rpx 150rpx;
|
||
position: relative;
|
||
|
||
.image {
|
||
position: absolute;
|
||
will-change: transform;
|
||
transform-origin: center center;
|
||
}
|
||
|
||
.controller {
|
||
position: absolute;
|
||
z-index: 99;
|
||
padding: 20rpx;
|
||
|
||
&::after {
|
||
display: block;
|
||
content: '';
|
||
box-shadow: 0 0 10rpx #333;
|
||
background-color: #E4E7ED;
|
||
}
|
||
|
||
&.controller_dot {
|
||
&::after {
|
||
width: 40rpx;
|
||
height: 40rpx;
|
||
border-radius: 99px;
|
||
}
|
||
}
|
||
|
||
&.vertical {
|
||
&::after {
|
||
width: 10rpx;
|
||
height: 40rpx;
|
||
}
|
||
}
|
||
|
||
&.horizon {
|
||
&::after {
|
||
width: 40rpx;
|
||
height: 10rpx;
|
||
}
|
||
}
|
||
}
|
||
|
||
.cropper {
|
||
position: absolute;
|
||
border: 1px solid #eee;
|
||
box-sizing: content-box;
|
||
transform-origin: center center;
|
||
outline: 999px solid rgba(0, 0, 0, 0.5);
|
||
will-change: transform;
|
||
display: contain;
|
||
pointer-events: none;
|
||
|
||
.line {
|
||
position: absolute;
|
||
// background-color: #eee;
|
||
}
|
||
|
||
.row {
|
||
width: 100%;
|
||
height: 0px;
|
||
left: 0;
|
||
border-top: 1px dashed #007AFF;
|
||
}
|
||
|
||
.col {
|
||
height: 100%;
|
||
width: 0px;
|
||
border-left: 1px dashed #007AFF;
|
||
}
|
||
|
||
.row1 {
|
||
top: 33%;
|
||
}
|
||
|
||
.row2 {
|
||
top: 66%;
|
||
}
|
||
|
||
.col1 {
|
||
left: 33%;
|
||
}
|
||
|
||
.col2 {
|
||
left: 66%;
|
||
}
|
||
}
|
||
}
|
||
|
||
.slot {
|
||
position: fixed;
|
||
width: 100%;
|
||
left: 0;
|
||
bottom: 131.58rpx;
|
||
height: 90rpx;
|
||
height: calc(90rpx+ constant(safe-area-inset-bottom)); ///兼容 IOS<11.2/
|
||
height: calc(90rpx + env(safe-area-inset-bottom)); ///兼容 IOS>11.2/
|
||
}
|
||
}
|
||
</style> |