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@x-copy/xcrop

v1.1.13

Published

JavaScript Vue & React image cropper

Downloads

4

Readme

移动端裁剪插件

npm GitHub license

移动端裁剪插件,原生 JavaScript 实现,无依赖,支持 Vue 2.0,React。

Demo

Demo

安装

Install with npm: npm install xcrop --save

直接使用

<input type="file" id="file-input" accept="image/*">
import Crop from 'xcrop'

const options = {}
const crop = new Crop(options)

crop.on('cancle', crop => {
  crop.hide()
})
crop.on('confirm', crop => {
  const canvas = crop.get({ format: 'canvas' })
  document.body.appendChild(canvas)
  crop.hide()
})

function onChange (e) {
  var file = e.target.files[0]
  if (!file) return false
  crop.load(file)
  this.value = ''
}

document.getElementById('file-input').onchange = onChange

基于 Vue 2.0 使用

<Crop
  :file="file"
  :options="options"
  @on-cancle="onCancle"
  @on-confirm="onConfirm"
  @on-error="onError"
/>
<input type="file" @change="onChange($event)" accept="image/*" :value="''">
<img v-if="output" :src="output" width="100%">
import Crop from 'xcrop/src/components/VueCrop'

export default {
  data () {
    return {
      file: null,
      options: {},
      output: ''
    }
  },
  methods: {
    onChange (e) {
      this.file = e.target.files[0]
    },
    onCancle (crop) {
      this.file = null
      crop.hide()
    },
    onConfirm (crop) {
      this.output = crop.get()
      this.file = null
      crop.hide()
    },
    onError (error) {
      console.log(error)
    }
  },
  components: {
    Crop
  }
}

基于 React 使用

import React, { Component } from 'react'
import Crop from 'xcrop/src/components/ReactCrop'

export default class App extends Component {

  constructor (props) {
    super(props)

    this.state = {
      options: {},
      output: ''
    }

    this.onChange = this.onChange.bind(this)
    this.onCancle = this.onCancle.bind(this)
    this.onConfirm = this.onConfirm.bind(this)
    this.onError = this.onError.bind(this)
  }

  onChange (e) {
    this.crop[0].load(e.target.files[0])
  }

  onCancle (crop) {
    crop.hide()
  }

  onConfirm (crop) {
    this.setState({
      output: crop.get()
    })
    crop.hide()
  }

  onError (error) {
    console.log(error)
  }

  render () {
    return (
      <div className="App">
        <input type="file" onChange={this.onChange} accept="image/*" value="" />

        {this.state.output && <img src={this.state.output} width="100%" alt="" />}

        <Crop
          ref={component => this.crop = component || null}
          options={this.state.options}
          onCancle={this.onCancle}
          onConfirm={this.onConfirm}
          onError={this.onError}
        />
      </div>
    )
  }
}

Options

Type: Object

实例化选项:new Crop(options)

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |el|false|Element|body|插入节点| |viewWidth|false|Number|document.documentElement.clientWidth|容器宽度| |viewHeight|false|Number|document.documentElement.clientHeight|容器高度|
|border|false|Object|{x,y,width,height}|裁剪框位置大小,默认居中,为容器90%大小| |circle|false|Boolean|false|裁剪框是否为圆形,仅样式改变,裁剪后输出的图片依然是矩形,不支持安卓<=4.1的版本| |maxScale|false|Number|2|允许缩放的最大比例| |confirmText|false|String|确认|确认按钮文字| |cancleText|false|String|取消|取消按钮文字| |beforeShowClass|false|String|crop_slide-to-left|显示的动画类名,会在显示之前添加,之后移除,可选:crop-slide-to*, *: left/right/top/bottom| |beforeHideClass|false|String|crop_slide-to-bottom|隐藏的动画类名,会在隐藏之前添加,参数同上|

实例方法

load(target)

加载图片

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |target|true|String/File/Element|-|图片目标,可以是flile/base64/imageElement/objectUrl/canvas|

get(options)

获取裁剪图片

|options 属性|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |width|false|Number|默认宽度基于原图比例|裁剪宽度| |height|false|Number|默认高度基于原图比例|裁剪高度| |type|false|String|image/jpeg|图片格式| |format|false|String|base64|输出格式,可选:canvas/objectUrl/base64/file|
|quality|false|Number|0.85|图片质量,对应canvas toDataURL方法|

|返回值|类型|说明| |:-----|:------|:-----------------------------| |result|String/Element/File|返回结果,根据输入选项返回对应结果|

show / hide

显示/隐藏组件

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |transition|false|Boolean|true|是否需要过渡动画|

setBorder

设置裁剪框位置大小:setBorder(border)

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |border|true|Object|-|裁剪框大小:{x, y, width, height}|

on

监听自定义事件,函数返回自身,可以链式调用,

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |eventName|true|String|-|事件名| |fn|true|Function|-|事件函数|
|once|false|Boolean|undefined|此事件是否只执行一次|

可监听的事件有:

|事件名|说明| |:-----|-----------------------------|
|loaded|图片加载完成|
|error|图片加载失败|
|cancle|按钮取消|
|confirm|按钮确认|
|dragstart|单指按下|
|dragmove|单指拖动|
|dragend|单指拖动结束|
|pinchstart|双指按下
|pinchmove|双指拖动|
|pinchend|双指拖动结束|

emit

分发自定义事件

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |eventName|true|String|-|事件名|
|arguments|false|*|-|携带的参数|

off

移除自定义事件

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |eventName|true|String|-|事件名|
|fn|true|Function|-|移除的函数|

this.canvas.moveTo

移动图片到指定位置

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |x|true|Number|-|x坐标|
|y|true|Number|-|y坐标|

this.canvas.sacleTo

缩放图片

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |point|true|Object|-|以点为中心缩放:{x:0, y:0}|
|scale|true|Number|-|缩放比例|

destroy

销毁组件

静态方法

Crop.imageToCanvas

图片转canvas

|参数|必选|类型|默认|说明| |:-----|:-------|:-----|:-----|-----------------------------| |target|true|string/file/element|-|图片|
|callback|true|Function|-|成功回调,回调函数中第一个参数为canvas| |options|false|Object|{orientation: true, errorCallback: function () {}}|可选项,orientation:是否需要更正图片方向,errorCallback: 出错回调|

Browser support

Android 4.2+, iOS 8+