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Vue

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<template>
<view class="content">
<view class="cropper-wrapper" :style="{ height: cropperOpt.height + 'px' }">
<canvas
class="cropper"
:disable-scroll="true"
@touchstart="touchStart"
@touchmove="touchMove"
@touchend="touchEnd"
:style="{ width: cropperOpt.width, height: cropperOpt.height, backgroundColor: 'rgba(0, 0, 0, 0.8)' }"
canvas-id="cropper"
id="cropper"
></canvas>
<canvas
class="cropper"
:disable-scroll="true"
:style="{
position: 'fixed',
top: `-${cropperOpt.width * cropperOpt.pixelRatio}px`,
left: `-${cropperOpt.height * cropperOpt.pixelRatio}px`,
width: `${cropperOpt.width * cropperOpt.pixelRatio}px`,
height: `${cropperOpt.height * cropperOpt.pixelRatio}`
}"
canvas-id="targetId"
id="targetId"
></canvas>
</view>
<view class="cropper-buttons safe-area-padding" :style="{ height: bottomNavHeight + 'px' }">
<!-- #ifdef H5 -->
<view class="upload" @tap="uploadTap"></view>
<!-- #endif -->
<!-- #ifndef H5 -->
<view class="upload" @tap="uploadTap"></view>
<!-- #endif -->
<view class="getCropperImage" @tap="getCropperImage(false)"></view>
</view>
</view>
</template>
<script>
import WeCropper from './weCropper.js';
export default {
props: {
// 裁剪矩形框的样式其中可包含的属性为lineWidth-边框宽度(单位rpx)color: 边框颜色,
// mask-遮罩颜色一般设置为一个rgba的透明度如"rgba(0, 0, 0, 0.35)"
boundStyle: {
type: Object,
default() {
return {
lineWidth: 4,
borderColor: 'rgb(245, 245, 245)',
mask: 'rgba(0, 0, 0, 0.35)'
};
}
}
// // 裁剪框宽度单位rpx
// rectWidth: {
// type: [String, Number],
// default: 400
// },
// // 裁剪框高度单位rpx
// rectHeight: {
// type: [String, Number],
// default: 400
// },
// // 输出图片宽度单位rpx
// destWidth: {
// type: [String, Number],
// default: 400
// },
// // 输出图片高度单位rpx
// destHeight: {
// type: [String, Number],
// default: 400
// },
// // 输出的图片类型,如果发现裁剪的图片很大,可能是因为设置为了"png",改成"jpg"即可
// fileType: {
// type: String,
// default: 'jpg',
// },
// // 生成的图片质量
// // H5上无效目前不考虑使用此参数
// quality: {
// type: [Number, String],
// default: 1
// }
},
data() {
return {
// 底部导航的高度
bottomNavHeight: 50,
originWidth: 200,
width: 0,
height: 0,
cropperOpt: {
id: 'cropper',
targetId: 'targetCropper',
pixelRatio: 1,
width: 0,
height: 0,
scale: 2.5,
zoom: 8,
cut: {
x: (this.width - this.originWidth) / 2,
y: (this.height - this.originWidth) / 2,
width: this.originWidth,
height: this.originWidth
},
boundStyle: {
lineWidth: uni.upx2px(this.boundStyle.lineWidth),
mask: this.boundStyle.mask,
color: this.boundStyle.borderColor
}
},
// 裁剪框和输出图片的尺寸,高度默认等于宽度
// 输出图片宽度单位px
destWidth: 200,
// 裁剪框宽度单位px
rectWidth: 200,
// 输出的图片类型,如果'png'类型发现裁剪的图片太大,改成"jpg"即可
fileType: 'jpg',
src: '', // 选择的图片路径,用于在点击确定时,判断是否选择了图片
};
},
onLoad(option) {
let rectInfo = uni.getSystemInfoSync();
this.width = rectInfo.windowWidth;
this.height = rectInfo.windowHeight - this.bottomNavHeight;
this.cropperOpt.width = this.width;
this.cropperOpt.height = this.height;
this.cropperOpt.pixelRatio = rectInfo.pixelRatio;
if (option.destWidth) this.destWidth = option.destWidth;
if (option.rectWidth) {
let rectWidth = Number(option.rectWidth);
this.cropperOpt.cut = {
x: (this.width - rectWidth) / 2,
y: (this.height - rectWidth) / 2,
width: rectWidth,
height: rectWidth
};
}
this.rectWidth = option.rectWidth;
if (option.fileType) this.fileType = option.fileType;
// 初始化
this.cropper = new WeCropper(this.cropperOpt)
.on('ready', ctx => {
// wecropper is ready for work!
})
.on('beforeImageLoad', ctx => {
// before picture loaded, i can do something
})
.on('imageLoad', ctx => {
// picture loaded
})
.on('beforeDraw', (ctx, instance) => {
// before canvas draw,i can do something
});
// 设置导航栏样式以免用户在page.json中没有设置为黑色背景
uni.setNavigationBarColor({
frontColor: '#ffffff',
backgroundColor: '#000000'
});
uni.chooseImage({
count: 1, // 默认9
sizeType: ['compressed'], // 可以指定是原图还是压缩图,默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有
success: res => {
this.src = res.tempFilePaths[0];
// 获取裁剪图片资源后给data添加src属性及其值
this.cropper.pushOrign(this.src);
}
});
},
methods: {
touchStart(e) {
this.cropper.touchStart(e);
},
touchMove(e) {
this.cropper.touchMove(e);
},
touchEnd(e) {
this.cropper.touchEnd(e);
},
getCropperImage(isPre = false) {
if(!this.src) return this.$u.toast('请先选择图片再裁剪');
let cropper_opt = {
destHeight: Number(this.destWidth), // uni.canvasToTempFilePath要求这些参数为数值
destWidth: Number(this.destWidth),
fileType: this.fileType
};
this.cropper.getCropperImage(cropper_opt, (path, err) => {
if (err) {
uni.showModal({
title: '温馨提示',
content: err.message
});
} else {
if (isPre) {
uni.previewImage({
current: '', // 当前显示图片的 http 链接
urls: [path] // 需要预览的图片 http 链接列表
});
} else {
uni.$emit('uAvatarCropper', path);
this.$u.route({
type: 'back'
});
}
}
});
},
uploadTap() {
const self = this;
uni.chooseImage({
count: 1, // 默认9
sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图,默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有
success: (res) => {
self.src = res.tempFilePaths[0];
// 获取裁剪图片资源后给data添加src属性及其值
self.cropper.pushOrign(this.src);
}
});
}
}
};
</script>
<style scoped lang="scss">
@import '../../libs/css/style.components.scss';
.content {
background: rgba(255, 255, 255, 1);
}
.cropper {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 11;
}
.cropper-buttons {
background-color: #000000;
color: #eee;
}
.cropper-wrapper {
position: relative;
@include vue-flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
width: 100%;
background-color: #000;
}
.cropper-buttons {
width: 100vw;
@include vue-flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
position: fixed;
bottom: 0;
left: 0;
font-size: 28rpx;
}
.cropper-buttons .upload,
.cropper-buttons .getCropperImage {
width: 50%;
text-align: center;
}
.cropper-buttons .upload {
text-align: left;
padding-left: 50rpx;
}
.cropper-buttons .getCropperImage {
text-align: right;
padding-right: 50rpx;
}
</style>