1.上传页
2裁剪页面
disable-scroll="true"
@touchstart="touchStart"
@touchmove="touchMove"
@touchend="touchEnd"
:style="{ width: cropperOpt.width, height: cropperOpt.height }"
canvas-id="cropper"
>
取消
3.在upload页面引入weCropper.js
(function(global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.weCropper = factory());
}(this, (function() {
'use strict';
/**
- Created by sail on 2017/6/11.
*/
var device = void 0;
var TOUCH_STATE = ['touchstarted', 'touchmoved', 'touchended'];
function firstLetterUpper(str) {
return str.charAt(0).toUpperCase() + str.slice(1);
}
function setTouchState(instance) {
for (var _len = arguments.length, arg = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
arg[_key - 1] = arguments[_key];
}
TOUCH_STATE.forEach(function(key, i) {
if (arg[i] !== undefined) {
instance[key] = arg[i];
}
});
}
function validator(instance, o) {
Object.defineProperties(instance, o);
}
function getDevice() {
if (!device) {
device = wx.getSystemInfoSync();
}
return device;
}
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function(obj) {
return typeof obj;
} : function(obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
var classCallCheck = function(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
};
var createClass = function() {
function defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
return function(Constructor, protoProps, staticProps) {
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
};
}();
var slicedToArray = function() {
function sliceIterator(arr, i) {
var _arr = [];
var _n = true;
var _d = false;
var _e = undefined;
try {
for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
_arr.push(_s.value);
if (i && _arr.length === i) break;
}
} catch (err) {
_d = true;
_e = err;
} finally {
try {
if (!_n && _i["return"]) _i["return"]();
} finally {
if (_d) throw _e;
}
}
return _arr;
}
return function(arr, i) {
if (Array.isArray(arr)) {
return arr;
} else if (Symbol.iterator in Object(arr)) {
return sliceIterator(arr, i);
} else {
throw new TypeError("Invalid attempt to destructure non-iterable instance");
}
};
}();
var tmp = {};
var DEFAULT = {
id: {
default: 'cropper',
get: function get1(value) {
if (typeof value !== 'string') {}
tmp.id = value;
}
},
width: {
default: 750,
get: function get1(value) {
tmp.width = value;
}
},
height: {
default: 750,
get: function get1(value) {
tmp.height = value;
}
},
scale: {
default: 2.5,
get: function get1(value) {
tmp.scale = value;
}
},
zoom: {
default: 5,
get: function get1(value) {
tmp.zoom = value;
}
},
src: {
default: 'cropper',
get: function get1(value) {
tmp.src = value;
}
},
cut: {
default: {},
get: function get1(value) {
tmp.cut = value;
}
},
onReady: {
default: null,
get: function get1(value) {
tmp.ready = value;
}
},
onBeforeImageLoad: {
default: null,
get: function get1(value) {
tmp.beforeImageLoad = value;
}
},
onImageLoad: {
default: null,
get: function get1(value) {
tmp.imageLoad = value;
}
},
onBeforeDraw: {
default: null,
get: function get1(value) {
tmp.beforeDraw = value;
}
}
};
/**
- Created by sail on 2017/6/11.
*/
function prepare() {
var self = this;
var _getDevice = getDevice(),
windowWidth = _getDevice.windowWidth;
self.attachPage = function() {
var pages = getCurrentPages
// 获取到当前page上下文
();
var pageContext = pages[pages.length - 1];
// 把this依附在Page上下文的wecropper属性上，便于在page钩子函数中访问
pageContext.wecropper = self;
};
self.createCtx = function() {
var id = self.id;
if (id) {
self.ctx = wx.createCanvasContext(id);
}
};
self.deviceRadio = windowWidth / 750;
self.deviceRadio=self.deviceRadio.toFixed(2)
}
/**
*/
function observer() {
var self = this;
var EVENT_TYPE = ['ready', 'beforeImageLoad', 'beforeDraw', 'imageLoad'];
self.on = function(event, fn) {
if (EVENT_TYPE.indexOf(event) > -1) {
if (typeof fn === 'function') {
event === 'ready' ? fn(self) : self['on' + firstLetterUpper(event)] = fn;
}
}
return self;
};
}
/**
- Created by sail on 2017/6/11.
*/
function methods() {
var self = this;
var deviceRadio = self.deviceRadio;
console.log(JSON.stringify(self));
var boundWidth = self.width; // 裁剪框默认宽度，即整个画布宽度
var boundHeight = self.height; // 裁剪框默认高度，即整个画布高度
var _self$cut = self.cut,
_self$cut$x = _self$cut.x,
x = _self$cut$x === undefined ? 0 : _self$cut$x,
_self$cut$y = _self$cut.y,
y = _self$cut$y === undefined ? 0 : _self$cut$y,
_self$cut$width = _self$cut.width,
width = _self$cut$width === undefined ? boundWidth : _self$cut$width,
_self$cut$height = _self$cut.height,
height = _self$cut$height === undefined ? boundHeight : _self$cut$height;
self.updateCanvas = function() {
if (self.croperTarget) {
// 画布绘制图片
self.ctx.drawImage(self.croperTarget, self.imgLeft, self.imgTop, self.scaleWidth, self.scaleHeight);
}
typeof self.onBeforeDraw === 'function' && self.onBeforeDraw(self.ctx, self);
self.setBoundStyle // 设置边界样式
();
self.ctx.draw();
return self;
};
self.pushOrign = function(src) {
self.src = src;
typeof self.onBeforeImageLoad === 'function' && self.onBeforeImageLoad(self.ctx, self);
uni.getImageInfo({
src: src,
success: function success(res) {
var innerAspectRadio = res.width / res.height;
self.croperTarget = res.path||src;
if (innerAspectRadio < width / height) {
self.rectX = x;
self.baseWidth = width;
self.baseHeight = width / innerAspectRadio;
self.rectY = y - Math.abs((height - self.baseHeight) / 2);
} else {
self.rectY = y;
self.baseWidth = height * innerAspectRadio;
self.baseHeight = height;
self.rectX = x - Math.abs((width - self.baseWidth) / 2);
}
self.imgLeft = self.rectX;
self.imgTop = self.rectY;
self.scaleWidth = self.baseWidth;
self.scaleHeight = self.baseHeight;
self.updateCanvas();
typeof self.onImageLoad === 'function' && self.onImageLoad(self.ctx, self);
}
});
self.update();
return self;
};
self.getCropperImage = function() {
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
var id = self.id;
var ARG_TYPE = toString.call(args[0]);
switch (ARG_TYPE) {
case '[object Object]':
var _args$0$quality = args[0].quality,
quality = _args$0$quality === undefined ? 10 : _args$0$quality;
console.log("quality--"+quality);
uni.canvasToTempFilePath({
canvasId: id,
x: x,
y: y,
width: width,
height: height,
destWidth: width * quality / (deviceRadio * 10),
destHeight: height * quality / (deviceRadio * 10),
success: function success(res) {
console.log(res);
typeof args[args.length - 1] === 'function' && args[args.length - 1](res.tempFilePath);
}
});
break;
case '[object Function]':
uni.canvasToTempFilePath({
canvasId: id,
x: x,
y: y,
fileType:"jpg",
width: width,
height: height,
destWidth: width ,
destHeight: height,
success: function success(res) {
typeof args[args.length - 1] === 'function' && args[args.length - 1](res.tempFilePath);
}
});
break;
}
return self;
};
}
/**
- Created by sail on 2017/6/11.
*/
function update() {
var self = this;
if (!self.src) return;
self.__oneTouchStart = function(touch) {
self.touchX0 = touch.x;
self.touchY0 = touch.y;
};
self.__oneTouchMove = function(touch) {
var xMove = void 0,
yMove = void 0;
//计算单指移动的距离
if (self.touchended) {
return self.updateCanvas();
}
xMove = touch.x - self.touchX0;
yMove = touch.y - self.touchY0;
var imgLeft = self.rectX + xMove;
var imgTop = self.rectY + yMove;
self.outsideBound(imgLeft, imgTop);
self.updateCanvas();
};
self.__twoTouchStart = function(touch0, touch1) {
var xMove = void 0,
yMove = void 0,
oldDistance = void 0;
self.touchX1 = self.rectX + self.scaleWidth / 2;
self.touchY1 = self.rectY + self.scaleHeight / 2;
//计算两指距离
xMove = touch1.x - touch0.x;
yMove = touch1.y - touch0.y;
oldDistance = Math.sqrt(xMove * xMove + yMove * yMove);
self.oldDistance = oldDistance;
};
self.__twoTouchMove = function(touch0, touch1) {
var xMove = void 0,
yMove = void 0,
newDistance = void 0;
var scale = self.scale,
zoom = self.zoom;
// 计算二指最新距离
xMove = touch1.x - touch0.x;
yMove = touch1.y - touch0.y;
newDistance = Math.sqrt(xMove * xMove + yMove * yMove
// 使用0.005的缩放倍数具有良好的缩放体验
);
self.newScale = self.oldScale + 0.001 * zoom * (newDistance - self.oldDistance);
// 设定缩放范围
self.newScale <= 1 && (self.newScale = 1);
self.newScale >= scale && (self.newScale = scale);
self.scaleWidth = self.newScale * self.baseWidth;
self.scaleHeight = self.newScale * self.baseHeight;
var imgLeft = self.touchX1 - self.scaleWidth / 2;
var imgTop = self.touchY1 - self.scaleHeight / 2;
self.outsideBound(imgLeft, imgTop);
self.updateCanvas();
};
self.__xtouchEnd = function() {
self.oldScale = self.newScale;
self.rectX = self.imgLeft;
self.rectY = self.imgTop;
};
}
/**
- Created by sail on 2017/6/11.
*/
var handle = {
// 图片手势初始监测
touchStart: function touchStart(e) {
var self = this;
var _etouches[0],
touch1 = _e$touches[1];
console.log(JSON.stringify(touch1));
if(!touch0.x){
touch0.x=touch0.clientX;
touch0.y=touch0.clientY;
if(touch1){
touch1.x=touch1.clientX;
touch1.y=touch1.clientY;
}
}
setTouchState(self, true, null, null
//计算第一个触摸点的位置，并参照改点进行缩放
);
self.__oneTouchStart(touch0
// 两指手势触发
);
if (e.touches.length >= 2) {
self.__twoTouchStart(touch0, touch1);
}
},
// 图片手势动态缩放
touchMove: function touchMove(e) {
var self = this;
var _e$touches2 = slicedToArray(e.touches, 2),
touch0 = _e$touches2[0],
touch1 = _e$touches2[1];
if(!touch0.x){
touch0.x=touch0.clientX;
touch0.y=touch0.clientY;
if(touch1){
touch1.x=touch1.clientX;
touch1.y=touch1.clientY;
}
}
setTouchState(self, null, true
// 单指手势时触发
);
if (e.touches.length === 1) {
self.__oneTouchMove(touch0);
}
// 两指手势触发
if (e.touches.length >= 2) {
self.__twoTouchMove(touch0, touch1);
}
},
touchEnd: function touchEnd(e) {
var self = this;
setTouchState(self, false, false, true);
self.__xtouchEnd();
}
};
/**
- Created by sail on 1017/6/12.
*/
function cut() {
var self = this;
var deviceRadio = self.deviceRadio;
var boundWidth = self.width; // 裁剪框默认宽度，即整个画布宽度
var boundHeight = self.height;
// 裁剪框默认高度，即整个画布高度
var _self$cut = self.cut,
_self$cut$x = _self$cut.x,
x = _self$cut$x === undefined ? 0 : _self$cut$x,
_self$cut$y = _self$cut.y,
y = _self$cut$y === undefined ? 0 : _self$cut$y,
_self$cut$width = _self$cut.width,
width = _self$cut$width === undefined ? boundWidth : _self$cut$width,
_self$cut$height = _self$cut.height,
height = _self$cut$height === undefined ? boundHeight : _self$cut$height;
/**
* 设置边界
* @param imgLeft 图片左上角横坐标值
* @param imgTop 图片左上角纵坐标值
*/
self.outsideBound = function(imgLeft, imgTop) {
self.imgLeft = imgLeft >= x ? x : self.scaleWidth + imgLeft - x <= width ? x + width - self.scaleWidth : imgLeft;
self.imgTop = imgTop >= y ? y : self.scaleHeight + imgTop - y <= height ? y + height - self.scaleHeight : imgTop;
};
/**
* 设置边界样式
* @param color 边界颜色
*/
self.setBoundStyle = function() {
var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
_ref$color = _ref.color,
color = _ref$color === undefined ? '#04b00f' : _ref$color,
_ref$mask = _ref.mask,
mask = _ref$mask === undefined ? 'rgba(0, 0, 0, 0.3)' : _ref$mask,
_ref$lineWidth = _ref.lineWidth,
lineWidth = _ref$lineWidth === undefined ? 1 : _ref$lineWidth;
// 绘制半透明层
self.ctx.beginPath();
self.ctx.setFillStyle(mask);
self.ctx.fillRect(0, 0, x, boundHeight);
self.ctx.fillRect(x, 0, width, y);
self.ctx.fillRect(x, y + height, width, boundHeight - y - height);
self.ctx.fillRect(x + width, 0, boundWidth - x - width, boundHeight);
self.ctx.fill
// 设置边界左上角样式
// 为使边界样式处于边界外边缘，此时x、y均要减少lineWidth
();
self.ctx.beginPath();
self.ctx.setStrokeStyle(color);
self.ctx.setLineWidth(lineWidth);
self.ctx.moveTo(x - lineWidth, y + 10 - lineWidth);
self.ctx.lineTo(x - lineWidth, y - lineWidth);
self.ctx.lineTo(x + 10 - lineWidth, y - lineWidth);
self.ctx.stroke
// 设置边界左下角样式
// 为使边界样式处于边界外边缘，此时x要减少lineWidth、y要增加lineWidth
();
self.ctx.beginPath();
self.ctx.setStrokeStyle(color);
self.ctx.setLineWidth(lineWidth);
self.ctx.moveTo(x - lineWidth, y + height - 10 + lineWidth);
self.ctx.lineTo(x - lineWidth, y + height + lineWidth);
self.ctx.lineTo(x + 10 - lineWidth, y + height + lineWidth);
self.ctx.stroke
// 设置边界右上角样式
// 为使边界样式处于边界外边缘，此时x要增加lineWidth、y要减少lineWidth
();
self.ctx.beginPath();
self.ctx.setStrokeStyle(color);
self.ctx.setLineWidth(lineWidth);
self.ctx.moveTo(x + width - 10 + lineWidth, y - lineWidth);
self.ctx.lineTo(x + width + lineWidth, y - lineWidth);
self.ctx.lineTo(x + width + lineWidth, y + 10 - lineWidth);
self.ctx.stroke
// 设置边界右下角样式
// 为使边界样式处于边界外边缘，此时x、y均要增加lineWidth
();
self.ctx.beginPath();
self.ctx.setStrokeStyle(color);
self.ctx.setLineWidth(lineWidth);
self.ctx.moveTo(x + width + lineWidth, y + height - 10 + lineWidth);
self.ctx.lineTo(x + width + lineWidth, y + height + lineWidth);
self.ctx.lineTo(x + width - 10 + lineWidth, y + height + lineWidth);
self.ctx.stroke();
};
}
var version = '1.1.4';
var weCropper = function() {
function weCropper(params) {
classCallCheck(this, weCropper);
var self = this;
var _default = {};
validator(self, DEFAULT);
Object.keys(DEFAULT).forEach(function(key) {
_default[key] = DEFAULT[key].default;
});
Object.assign(self, _default, params);
self.prepare();
self.attachPage();
self.createCtx();
self.observer();
self.cutt();
self.methods();
self.init();
self.update();
return self;
}
createClass(weCropper, [{
key: 'init',
value: function init() {
var self = this;
var src = self.src;
self.version = __version__;
typeof self.onReady === 'function' && self.onReady(self.ctx, self);
if (src) {
self.pushOrign(src);
}
setTouchState(self, false, false, false);
self.oldScale = 1;
self.newScale = 1;
return self;
}
}]);
return weCropper;
}();
Object.assign(weCropper.prototype, handle);
weCropper.prototype.prepare = prepare;
weCropper.prototype.observer = observer;
weCropper.prototype.methods = methods;
weCropper.prototype.cutt = cut;
weCropper.prototype.update = update;
return weCropper;
})));