該方是基於uiautomator2如下版本進行驗證的：

PS C:\windows\system32> pip show uiautomator2
Name: uiautomator2
Version: 1.2.2
Summary: Python Wrapper for Android UiAutomator2 test tool
Home-page: https://github.com/codeskyblue/uiautomator2
Author: codeskyblue
Author-email: [email protected]
License: MIT
Location: c:\program files\python36\lib\site-packages
Requires: six,progress,whichcraft,logzero,lxml,adbutils,retry,Pillow,requests,humanize
Required-by: weditor,atx

　　下面貼出githup上關於該方法的使用

Watcher
 You can register watchers to perform some actions when a selector does not find a match.
 Register Watcher
 When a selector can not find a match,uiautomator2 will run all registered watchers.
 Click target when conditions match
 d.watcher("AUTO_FC_WHEN_ANR").when(text="ANR").when(text="Wait") \
               .click(text="Force Close")
 # d.watcher(name) ## creates a new named watcher.
 # .when(condition) ## the UiSelector condition of the watcher.
 # .click(target) ## perform click action on the target UiSelector.
 There is also a trick about click. You can use click without arguments.
 d.watcher("ALERT").when(text="OK").click()
 # Same as
 d.watcher("ALERT").when(text="OK").click(text="OK")
 Press key when a condition becomes true
 d.watcher("AUTO_FC_WHEN_ANR").when(text="ANR").when(text="Wait") \
               .press("back","home")
 # d.watcher(name) ## creates a new named watcher.
 # .when(condition) ## the UiSelector condition of the watcher.
 # .press(<keyname>,...,<keyname>.() ## press keys one by one in sequence.
 Check if the named watcher triggered
 A watcher is triggered,which means the watcher was run and all its conditions matched.
 d.watcher("watcher_name").triggered
 # true in case of the specified watcher triggered,else false
 Remove a named watcher
 # remove the watcher
 d.watcher("watcher_name").remove()
 List all watchers
 d.watchers
 # a list of all registered watchers
 Check for any triggered watcher
 d.watchers.triggered
 # true in case of any watcher triggered
 Reset all triggered watchers
 # reset all triggered watchers,after that,d.watchers.triggered will be false.
 d.watchers.reset()
 Remove watchers
 # remove all registered watchers
 d.watchers.remove()
 # remove the named watcher,same as d.watcher("watcher_name").remove()
 d.watchers.remove("watcher_name")
 Force to run all watchers
 # force to run all registered watchers
 d.watchers.run()

注：裡面涉及的watcher_name可以自定義，可以做到見名知意即可

watcher的使用是要先註冊（第9行至20行均是註冊watcher的方法），然後啟用watcher(第56行)，注意這個啟用方法只是一個瞬時啟用，就是說使用之後即銷燬，不會一直存於後臺。那這樣的話在實際的使用場景中怎麼使用這個功能呢，下面看一段指令碼 1 # -*- coding:utf-8 -*-

import uiautomator2 as u2
import time
d = u2.connect()
cfg = MTBFConfig()
package = cfg.getstr("Admit","pkg","config")
PACKAGELIST = package.split(",")
print(PACKAGELIST)
d.watcher("‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‎‎‎‎‎‎‎‎‏‎‎‎‏‎‎‏‏‎‏‎‏‎‎‎‏‏‏‎‏‏‏‎‏‏‎‎‎‏‏‏‏‏‏‏‎‎‏‎‎‏‏‎‎‎‏‎‎‎‏‏‏‎ALLOW‎‏‎‎‏‎").when(text="‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‎‎‎‎‎‎‎‎‏‎‎‎‏‎‎‏‏‎‏‎‏‎‎‎‏‏‏‎‏‏‏‎‏‏‎‎‎‏‏‏‏‏‏‏‎‎‏‎‎‏‏‎‎‎‏‎‎‎‏‏‏‎ALLOW‎‏‎‎‏‎").click(text="‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‎‎‎‎‎‎‎‎‏‎‎‎‏‎‎‏‏‎‏‎‏‎‎‎‏‏‏‎‏‏‏‎‏‏‎‎‎‏‏‏‏‏‏‏‎‎‏‎‎‏‏‎‎‎‏‎‎‎‏‏‏‎ALLOW‎‏‎‎‏‎")
#d.watchers.run()
print(d.watchers)
time.sleep(2)
pkglen = len(PACKAGELIST)
print(("There are %d package for test") %pkglen)
class Admit(object):
 def main(self):
   for i in range(pkglen):
     k = 0
     for j in range(5):
       if d.info['currentPackageName'] != PACKAGELIST[i]:
         d.app_start(PACKAGELIST[i])
         print(PACKAGELIST[i])
         time.sleep(1)
         k += 1
       if k == 3:
         print("Can not enter "+ str(PACKAGELIST[i]))
         return False
     if PACKAGELIST[i] == 'com.google.android.contacts':
       print("hello")
       if d(description = "Open navigation drawer").exists(timeout = 5):
         d(description = "Open navigation drawer").click()
       if d(text = "Settings").exists(timeout = 5):
         d(text = "Settings").click()
       if d(resourceId="android:id/title",text = "Import").exists(timeout=5):
         d(resourceId="android:id/title",text = "Import").click()
         time.sleep(3)
       if d(resourceId = "android:id/button1",text = "OK").exists(timeout = 5):
         d(resourceId = "android:id/button1",text = "OK").click()
         time.sleep(1)
         d.watchers.run() //在上面OK點選之後會彈出一個許可權訪問的許可，所以這個時候需要啟用一次watcher把彈框關掉，以便不影響後續測試，所以就一個原則，哪裡可能會有彈框就在哪裡啟用watcher
if __name__=="__main__":
 ad = Admit()
 ad.main()

總結

以上所述是小編給大家介紹的python uiautomator2 watcher的使用方法,希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回覆大家的。在此也非常感謝大家對我們網站的支援！
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