添加代码

pages/video/video.vue

@@ -296,6 +296,8 @@
 			}
 		},
 		onLoad(e) {
+			this.div(1, 2)
+			this.getDistance(0, 0)
 			// #ifdef H5
 			let ua = navigator.userAgent.toLowerCase();
 			if (ua.indexOf('micromessenger') !== -1) {
@@ -385,6 +387,41 @@
 			},
 		},
 		methods: {
+			//除法函数，用来得到精确的除法结果
+			//说明：javascript的除法结果会有误差，在两个浮点数相除的时候会比较明显。这个函数返回较为精确的除法结果。
+			//调用：div(arg1,arg2)
+			//返回值：arg1除以arg2的精确结果
+			div(arg1, arg2) {
+				var t1 = 0,
+					t2 = 0,
+					r1,
+					r2;
+				try {
+					t1 = arg1.toString().split(".")[1].length;
+				} catch (e) {
+					t1 = 0;
+				}
+				try {
+					t2 = arg2.toString().split(".")[1].length;
+				} catch (e) {
+					t2 = 0;
+				}
+				r1 = Number(arg1.toString().replace(".", ""));
+				r2 = Number(arg2.toString().replace(".", ""));
+				return mul(r1 / r2, Math.pow(10, t2 - t1));
+			},
+
+			getDistance(lat1, lng1, lat2, lng2) {
+				var radLat1 = Rad(lat1);
+				var radLat2 = Number(Rad(lat2));
+				var a = Number(radLat1 - radLat2);
+				var b = Rad(lng1) - Rad(lng2);
+				var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math
+					.pow(Math.sin(b / 2), 2)));
+				s = s * 6378.137;
+				s = Math.round(s * 10000) / 10;
+				return s;
+			},
 			disableContextMenu(event) {
 				event.preventDefault();
 			},
@@ -488,8 +525,8 @@
 				// #ifdef H5
 				uni.hideLoading()
 				// #endif
-				if (e.detail.currentTime > e.detail.duration*0.9) {
-					if ( this.playFlag) {
+				if (e.detail.currentTime > e.detail.duration * 0.9) {
+					if (this.playFlag) {
 						this.playFlag = false
 						this.$Request.getT('app/course/viewCourse', {
 							courseId: this.courseId,