如何委托 URLSessionDownloadDelegate

如何解决如何委托 URLSessionDownloadDelegate

我已经实现了从远程下载文件的代码我想创建进度条但委托不起作用。

你能帮我理解这个问题的问题吗？

非常感谢大家

runfile('C:/Users/###/Documents/GitLab/test_project/run.py',wdir='C:/Users/###/Documents/GitLab/test_project')

runfile('C:/Users/###/Documents/GitLab/test_project/run.py',wdir='C:/Users/###/Documents/GitLab/test_project')
Reloaded modules: my_module,my_module._sub_module.test_fun
Traceback (most recent call last):

  File "<frozen importlib._bootstrap>",line 908,in _find_spec

AttributeError: 'ImportDenier' object has no attribute 'find_spec'


During handling of the above exception,another exception occurred:

Traceback (most recent call last):

  File "C:\Users\###\Documents\GitLab\test_project\run.py",line 4,in <module>
    from my_module._sub_module.test_fun import test_fun

  File "<frozen importlib._bootstrap>",line 991,in _find_and_load

  File "<frozen importlib._bootstrap>",line 971,in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>",line 910,in _find_spec

  File "<frozen importlib._bootstrap>",line 884,in _find_spec_legacy

  File "C:\Users\###\Anaconda3\lib\site-packages\IPython\external\qt_loaders.py",line 48,in find_module
    if path:

  File "<frozen importlib._bootstrap_external>",line 1183,in __len__

  File "<frozen importlib._bootstrap_external>",line 1162,in _recalculate

  File "<frozen importlib._bootstrap_external>",line 1158,in _get_parent_path

KeyError: 'my_module'

解决方法

为了调用委托方法，您需要删除完成处理程序：

let task = self.downloadSession?.downloadTask(with: url)