启动appium，链接手机，设置好参数，正常启动微信之后，uiautomator可以正常inspect微信页面元素。
但是尝试去获取微信小程序页面元素时就报错，500
1. 这个问题是微信最近的新版本之后才出现的7.0.16之后才发生
2. 好像跟微信的基础库没关系。
appium log:
**[W3C] Matched W3C error code 'unknown error' to UnknownError
[HTTP] <-- GET /wd/hub/session/dfa0f673-ed3c-4bab-b8b2-c7535ef1c531/source 500** 15612 ms - 244
[HTTP]
[WD Proxy] Got response with status 200: {"sessionId":"86eb070c-8f61-4f3c-b662-d1d6bc4fc55d","value":"iVBORw0KGgoAAAANSUhEUgAABDgAAAkkCAYAAAD508+vAAAAAXNSR0IArs4c6QAAAARzQklUCAgI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\noIQcTqcTzc0...
[WD Proxy] Matched '/wd/hub/session/dfa0f673-ed3c-4bab-b8b2-c7535ef1c531/window/current/size' to command name 'getWindowSize'
[WD Proxy] Proxying [GET /wd/hub/session/dfa0f673-ed3c-4bab-b8b2-c7535ef1c531/window/current/size] to [GET http://localhost:8200/wd/hub/session/86eb070c-8f61-4f3c-b662-d1d6bc4fc55d/window/current/size] with body: {}
[MJSONWP (dfa0f673)] Responding to client with driver.getScreenshot() result: "iVBORw0KGgoAAAANSUhEUgAABDgAAAkkCAYAAAD508+vAAAAAXNSR0IArs4c6QAAAARzQklUCAgI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\nB6BLSF...
[HTTP] <-- GET /wd/hub/session/dfa0f673-ed3c-4bab-b8b2-c7535ef1c531/screenshot
求能解决这个问题的大神！！！！！！！