初始化（包含登录模块）

pages/API/brightness/brightness.vue

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+<template>
+	<view>
+		<page-head :title="title"></page-head>
+		<view class="uni-padding-wrap uni-common-mt">
+			<!-- #ifndef MP-TOUTIAO -->
+			<view class="text-box">亮度 : {{ screen }}</view>
+			<view class="uni-slider"><slider :value="screen" @changing="sliderChange" step="1" /></view>
+			<!-- #endif -->
+			<button type="primary" @click="keep">
+				{{ keepScreenOn ? '保持常亮状态' : '关闭常亮状态' }}
+			</button>
+			<view class="tips">
+				保持常亮时，屏幕不会熄灭。仅在当前应用生效，离开应用后设置失效。
+			</view>
+		</view>
+	</view>
+</template>
+<script>
+export default {
+	data() {
+		return {
+			title: 'brightness',
+			screen: 0,
+			keepScreenOn: true
+		};
+	},
+	onLoad() {
+		uni.getScreenBrightness({
+			success: res => {
+				this.screen = (res.value * 100).toFixed();
+			},
+			fail(e) {
+				console.log(e);
+			}
+		});
+	},
+	methods: {
+		sliderChange(e) {
+			let screen = e.detail.value;
+			// 判断是否重复
+			if (this.screen !== screen) {
+				console.log('当前数值：' + e.detail.value);
+				uni.setScreenBrightness({
+					value: screen / 100,
+					success: function() {
+					},
+					fail(e) {
+						console.log(e);
+					}
+				});
+				this.screen = screen;
+			}
+		},
+		keep() {
+			uni.setKeepScreenOn({
+				keepScreenOn: this.keepScreenOn
+			});
+			this.keepScreenOn = !this.keepScreenOn;
+		}
+	}
+};
+</script>
+
+<style>
+.text-box {
+	margin-bottom: 40rpx;
+	display: flex;
+	justify-content: center;
+	align-items: center;
+	height: 300rpx;
+	background-color: #ffffff;
+	font-size: 32rpx;
+	color: #353535;
+}
+
+.uni-slider {
+	margin: 100rpx 0;
+}
+
+.tips {
+	font-size: 26rpx;
+	text-align: center;
+	margin-top: 20rpx;
+	color: #999;
+}
+</style>