1. 获取系统信息
wx.getSystemInfo(OBJECT)
wx.getSystemInfoSync() 同步获取系统信息
![](https://images2017.cnblogs.com/blog/1048586/201801/1048586-20180124173141662-86333529.png)
回调常用参数
model(手机型号) pixelRatio, screenWidth , screenHeight, windowWidth ,widnowHeight
language, version , system , platform ,fontSizeSetting, SDKversion
2. wx.canIUse(String)
判断小程序的API,回调,参数,组件等是否在当前版本可用。
3. wx.getNetworkType(OBJECT)
获取用户的网络设备信息
4. 微信小程序API-设备-拨打电话
wx.makePhoneCall(OBJECT)
![](https://images2017.cnblogs.com/blog/1048586/201801/1048586-20180124173328459-1793656385.png)
重要参数
PhoneNumber success fail complete
5. 微信小程序API-调起客户端扫码界面,扫码成功后返回对应的结果
onlyFromCamera 是否只能从相机扫码,不允许从相册选择图片
success /fail /complete
result, scanType, charSet, path
// 允许从相机和相册扫码 wx.scanCode({ success: (res) => { console.log(res) } })
// 只允许从相机扫码 wx.scanCode({ onlyFromCamera: true, success: (res) => { console.log(res) } })