ios17 截图不太稳定 经常提示报错

[hyfand]

import time
from ios_device.servers.dvt import DTXServer
from ios_device.remote.remote_lockdown import RemoteLockdownClient
from ios_device.servers.Instrument import InstrumentServer
from ios_device.util.variables import InstrumentsService
host = 'fd88:806d:8f61::1'
port = 61810

with RemoteLockdownClient((host, port)) as rsd:
    rpc = InstrumentServer(rsd).init()
    data = rpc.call(InstrumentsService.Screenshot, "takeScreenshot").selector
    print("start.")
    print(data)
    print("ending.")

以下是报错信息：

Traceback (most recent call last):
  File "/Users/happyelements/PycharmProjects/test_use/ios17_test/test03.py", line 15, in <module>
    data = rpc.call(InstrumentsService.Screenshot, "takeScreenshot").selector
  File "/Users/happyelements/PycharmProjects/test_use/venv/lib/python3.9/site-packages/ios_device/servers/dvt.py", line 185, in call
    channel_id = self.make_channel(channel)
  File "/Users/happyelements/PycharmProjects/test_use/venv/lib/python3.9/site-packages/ios_device/servers/dvt.py", line 180, in make_channel
    self._call(True, 0, "_requestChannelWithCode:identifier:", channel_id, channel)
  File "/Users/happyelements/PycharmProjects/test_use/venv/lib/python3.9/site-packages/ios_device/servers/dvt.py", line 223, in _call
    self._client.send_dtx(self._cli, dtx)
  File "/Users/happyelements/PycharmProjects/test_use/venv/lib/python3.9/site-packages/ios_device/servers/dvt.py", line 38, in send_dtx
    return client.send(buffer)
AttributeError: 'NoneType' object has no attribute 'send'

重试多次都不行，提示cli是None

[YueChen-C]

没遇到啊，什么场景型号和环境？

[hyfand]

是这样的， 我开了一个rpc连接，然后一直复用这个连接请求图，然后时间一长就会提示 AttributeError: 'NoneType' object has no attribute 'send'

具体代码如下

def iter_screenshot(rsd: object, udid: object) -> object:

    channel = InstrumentsService.Screenshot
    rpc = InstrumentServer(rsd, udid).init()
    while True:
        try:
            data = rpc.call(channel, "takeScreenshot").selector
            time.sleep(3)
            if data:
                rpc.stop()
        except Exception:
            traceback.print_exc()
            print("[截图]rpc 连接失败, 将重新连接")
            time.sleep(3)
            continue
        memory_fd = io.BytesIO(data)
        im = Image.open(memory_fd)
        im.load()
        del (memory_fd)
        yield im

貌似会断连接，不知道原因。 现在处理是每次开一个新rpc去请求一张截图，然后关掉rpc，这样的处理的。 您知道代码问题所在 或者 为什么会断连接丢失 cli 为 None 吗。

[YueChen-C]

windows 吗 windows 的话图片比较大，好像堵塞然后早成 socket 断开。

[hyfand]

问题发生在mac电脑。 windows上次我提过了，您说通道阻塞，我已暂时放弃windows平台截图。 感谢作者， 我已经解决，每次建立新连接，拿到图就断开。

[YueChen-C]

mac 我试了循环 5 分钟没出现你所说问题 ，业务层解决也行出现错误再重启一个实例。