userImg() {
				let that = this
				uni.chooseMedia({
					count: 1,
					mediaType: ['image', 'video'],
					sourceType: ['album', 'camera'],
					maxDuration: 30,
					camera: 'back',
					success(res) {
						console.log(res.tempFiles[0].tempFilePath)
						that.imagUrl = res.tempFiles[0].tempFilePath
					}
				})
			},

直接调用api即可,注意的是要把值赋给你需要的,this指向需要注意一下