修复微信小程序端裁剪图片问题

pages/ucenter/userinfo/limeClipper/utils.js

-
-/**
- * h5网络地址转base64
- */
-export function pathToBase64(path) {
-	// #ifdef H5
-	return new Promise((resolve, reject) => {
-		const _fileReader = (blob) => {
-			const fileReader = new FileReader();
-			fileReader.onload = (e) => {
-				resolve(e.target.result);
-			};
-			fileReader.readAsDataURL(blob);
-			fileReader.onerror = (error) => {
-				console.error('blobToBase64 error:', JSON.stringify(error))
-				reject(new Error('blobToBase64 error'));
-			};
-		}
-		if (/^(http|\/\/)/.test(path) && typeof FileReader === 'function') {
-			window.URL = window.URL || window.webkitURL;
-			const xhr = new XMLHttpRequest();
-			xhr.open("get", path, true);
-			xhr.timeout = 2000;
-			xhr.responseType = "blob";
-			xhr.onload = function() {
-				if (this.status == 200) {
-					_fileReader(this.response)
-				}
-			}
-			xhr.send();
-		}
-	})
-	// #endif
-}
-
 /**
  * 判断手指触摸位置
  */
-export function determineDirection(cutX, cutY, clipWidth, clipHeight, currentX, currentY) {
-	const EXPAND_SIZE = 24;
-
-	let leftx1 = cutX - EXPAND_SIZE;
-	let leftx2 = cutX + EXPAND_SIZE;
-
-	let topy1 = cutY - EXPAND_SIZE;
-	let topy2 = cutY + EXPAND_SIZE;
-
-	let rightx1 = cutX + clipWidth - EXPAND_SIZE;
-	let rightx2 = cutX + clipWidth + EXPAND_SIZE;
-
-	let bottomy1 = cutY + clipHeight - EXPAND_SIZE;
-	let bottomy2 = cutY + clipHeight + EXPAND_SIZE;
+export function determineDirection(clipX, clipY, clipWidth, clipHeight, currentX, currentY) {
+	/*
+	 * (右下>>1 右上>>2 左上>>3 左下>>4)
+	 */
 	let corner;
-	const isRight = currentX > rightx1 && currentX < rightx2;
-	const isLeft = currentX > leftx1 && currentX < leftx2;
-	const isBottom = currentY > bottomy1 && currentY < bottomy2;
-	const isTop = currentY > topy1 && currentY < topy2;
-	if (isRight && isBottom) {
-		corner = 1;
-	} else if (isRight && isTop) {
-		corner = 2;
-	} else if (isLeft && isTop) {
-		corner = 3;
-	} else if (isLeft && isBottom) {
-		corner = 4;
+	/**
+	 * 思路：（利用直角坐标系）
+	 *  1.找出裁剪框中心点
+	 *  2.如点击坐标在上方点与左方点区域内，则点击为左上角
+	 *  3.如点击坐标在下方点与右方点区域内，则点击为右下角
+	 *  4.其他角同理
+	 */
+	const mainPoint = [clipX + clipWidth / 2, clipY + clipHeight / 2]; // 中心点
+	const currentPoint = [currentX, currentY]; // 触摸点
+
+	if (currentPoint[0] <= mainPoint[0] && currentPoint[1] <= mainPoint[1]) {
+		corner = 3; // 左上
+	} else if (currentPoint[0] >= mainPoint[0] && currentPoint[1] <= mainPoint[1]) {
+		corner = 2; // 右上
+	} else if (currentPoint[0] <= mainPoint[0] && currentPoint[1] >= mainPoint[1]) {
+		corner = 4; // 左下
+	} else if (currentPoint[0] >= mainPoint[0] && currentPoint[1] >= mainPoint[1]) {
+		corner = 1; // 右下
 	}
+
 	return corner;
 }
 
@@ -71,31 +33,32 @@ export function determineDirection(cutX, cutY, clipWidth, clipHeight, currentX,
  * 图片边缘检测检测时，计算图片偏移量
  */
 export function calcImageOffset(data, scale) {
-	let {
-		imageLeft: left,
-		imageTop: top,
-		imageWidth,
-		imageHeight,
-		cutX,
-		clipWidth,
-		cutY,
-		clipHeight
-	} = data
+	let left = data.imageLeft;
+	let top = data.imageTop;
 	scale = scale || data.scale;
+	
+	let imageWidth = data.imageWidth;
+	  let imageHeight = data.imageHeight;
 	  if ((data.angle / 90) % 2) {
-		imageWidth = mageHeight;
-		imageHeight = mageWidth;
+	    imageWidth = data.imageHeight;
+	    imageHeight = data.imageWidth;
 	  }
+	  const {
+	      clipX,
+	      clipWidth,
+	      clipY,
+	      clipHeight
+	    } = data;
 
 	// 当前图片宽度/高度
 	const currentImageSize = (size) => (size * scale) / 2;
 	const currentImageWidth = currentImageSize(imageWidth);
 	const currentImageHeight = currentImageSize(imageHeight);
 
-	left = cutX + currentImageWidth >= left ? left : cutX + currentImageWidth;
-	left = cutX + clipWidth - currentImageWidth <= left ? left : cutX + clipWidth - currentImageWidth;
-	top = cutY + currentImageHeight >= top ? top : cutY + currentImageHeight;
-	top = cutY + clipHeight - currentImageHeight <= top ? top : cutY + clipHeight - currentImageHeight;
+	left = clipX + currentImageWidth >= left ? left : clipX + currentImageWidth;
+	left = clipX + clipWidth - currentImageWidth <= left ? left : clipX + clipWidth - currentImageWidth;
+	top = clipY + currentImageHeight >= top ? top : clipY + currentImageHeight;
+	top = clipY + clipHeight - currentImageHeight <= top ? top : clipY + clipHeight - currentImageHeight;
 	return {
 		left,
 		top,
@@ -138,15 +101,15 @@ export function calcImageSize(width, height, data) {
 		clipWidth,
 		clipHeight,
 		sysinfo,
-		width: oWidth,
-		height: oHeight
+		width: originWidth,
+		height: originHeight
 	} = data
 	if (imageWidth && imageHeight) {
-		if (imageWidth / imageHeight > (clipWidth || oWidth) / (clipWidth || oHeight)) {
-			imageHeight = clipHeight || oHeight;
+		if (imageWidth / imageHeight > (clipWidth || originWidth) / (clipWidth || originHeight)) {
+			imageHeight = clipHeight || originHeight;
 			imageWidth = (width / height) * imageHeight;
 		} else {
-			imageWidth = clipWidth || oWidth;
+			imageWidth = clipWidth || originWidth;
 			imageHeight = (height / width) * imageWidth;
 		}
 	} else {
@@ -174,15 +137,13 @@ export function clipTouchMoveOfCalculate(data, event) {
 	const clientX = event.touches[0].clientX;
 	const clientY = event.touches[0].clientY;
 
-	const {
+	let {
 		clipWidth,
 		clipHeight,
-		cutY: oldCutY,
-		cutX: oldCutX,
-		cutstart,
-		isLockRatio
-	} = data;
-	let {
+		clipY: oldClipY,
+		clipX: oldClipX,
+		clipStart,
+		isLockRatio,
 		maxWidth,
 		minWidth,
 		maxHeight,
@@ -195,8 +156,11 @@ export function clipTouchMoveOfCalculate(data, event) {
 
 	let width = clipWidth,
 		height = clipHeight,
-		cutY = oldCutY,
-		cutX = oldCutX,
+		clipY = oldClipY,
+		clipX = oldClipX,
+		// 获取裁剪框实际宽度/高度
+		// 如果大于最大值则使用最大值
+		// 如果小于最小值则使用最小值
 		sizecorrect = () => {
 			width = width <= maxWidth ? (width >= minWidth ? width : minWidth) : maxWidth;
 			height = height <= maxHeight ? (height >= minHeight ? height : minHeight) : maxHeight;
@@ -209,51 +173,51 @@ export function clipTouchMoveOfCalculate(data, event) {
 				return true;
 			}
 		};
-	if (cutstart.corner) {
-		height = cutstart.height + (cutstart.corner > 1 && cutstart.corner < 4 ? 1 : -1) * (cutstart.y - clientY);
-	}
-	switch (cutstart.corner) {
+	//if (clipStart.corner) {
+	height = clipStart.height + (clipStart.corner > 1 && clipStart.corner < 4 ? 1 : -1) * (clipStart.y - clientY);
+	//}
+	switch (clipStart.corner) {
 		case 1:
-			width = cutstart.width - cutstart.x + clientX;
+			width = clipStart.width - clipStart.x + clientX;
 			if (isLockRatio) {
 				height = width / (clipWidth / clipHeight);
 			}
 			if (!sizeinspect()) return;
 			break;
 		case 2:
-			width = cutstart.width - cutstart.x + clientX;
+			width = clipStart.width - clipStart.x + clientX;
 			if (isLockRatio) {
 				height = width / (clipWidth / clipHeight);
 			}
 			if (!sizeinspect()) {
 				return;
 			} else {
-				cutY = cutstart.cutY - (height - cutstart.height);
+				clipY = clipStart.clipY - (height - clipStart.height);
 			}
 
 			break;
 		case 3:
-			width = cutstart.width + cutstart.x - clientX;
+			width = clipStart.width + clipStart.x - clientX;
 			if (isLockRatio) {
 				height = width / (clipWidth / clipHeight);
 			}
 			if (!sizeinspect()) {
 				return;
 			} else {
-				cutY = cutstart.cutY - (height - cutstart.height);
-				cutX = cutstart.cutX - (width - cutstart.width);
+				clipY = clipStart.clipY - (height - clipStart.height);
+				clipX = clipStart.clipX - (width - clipStart.width);
 			}
 
 			break;
 		case 4:
-			width = cutstart.width + cutstart.x - clientX;
+			width = clipStart.width + clipStart.x - clientX;
 			if (isLockRatio) {
 				height = width / (clipWidth / clipHeight);
 			}
 			if (!sizeinspect()) {
 				return;
 			} else {
-				cutX = cutstart.cutX - (width - cutstart.width);
+				clipX = clipStart.clipX - (width - clipStart.width);
 			}
 			break;
 		default:
@@ -262,8 +226,8 @@ export function clipTouchMoveOfCalculate(data, event) {
 	return {
 		width,
 		height,
-		cutX,
-		cutY
+		clipX,
+		clipY
 	};
 }
 

pages/ucenter/userinfo/uploadCutImageToUnicloud.vue

@@ -11,20 +11,14 @@ export default {
 	data() {return {path: '',options:{"width":600,"height":600}}},
 	onLoad({path,options}) {
 		this.path = path
+		console.log('path-path-path-path',path);
 		if(options){
 			this.options = JSON.parse(options)
 		}
 	},
 	methods:{
 		successFn(e){
-			// uni.getImageInfo({
-			// 	src:e.url,
-			// 	complete: (e) => {
-			// 		console.log(e);
-			// 	}
-			// })
 			this.uploadImgToUnicloud(e.url,(url)=>{
-				//console.log(url);
 				this.getOpenerEventChannel().emit('uploadAvatarAfter', {url})
 				uni.navigateBack()
 			})