uniapp 拒绝调用相机怎么再次唤起提示打开权限

<camera v-if="isShow" style="height: 520rpx" mode="scanCode" device-position="back" flash="off" @scancode="takeCode">
</camera>

data() {
return {
isShow:false,

}

}

onShow() {
			let that = this
			uni.getSetting({
				success(res) {
					if (!res.authSetting['scope.camera']) {
						uni.authorize({
							scope: 'scope.camera',
							success(res) {
								// 授权成功
								uni.showToast({
									title: '授权成功',
									icon: 'none' 
								})
								that.isShow = true
							},
							fail() {
								uni.showModal({
									content: '检测到您没打开获取相机功能权限，是否去设置打开？',
									confirmText: "确认",
									cancelText: '取消',
									success: (res) => {
										if (res.confirm) {
											uni.openSetting({
												success: (res) => {
													uni.showToast({
														title: '授权成功',
														icon: 'none', 
														duration:2000
													}) 
												},
												fail: (err) => {
													console.log(err)
												}
											})
										} else {
											uni.showToast({
												title: '获取授权相机授权失败',
												icon: 'none',
												success: function() {
													uni.navigateBack()
												}
											})
										}
									}
								})
							}
						})
					}else{
						that.isShow = true
					}
				},
				fail() {
					uni.showToast({
						title: '获取授权相机授权失败',
						icon: 'none',
						success: function() {
							uni.navigateBack()
						}
					})
				}
			})
		},