A-Hing
11/19/2019 - 12:28 PM

URLWithString: 返回nil

URLWithString nil
content_copyfile_download
 
str = [str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];//编码
NSURL * url =  [NSURL URLWithString:str]；