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ARC禁止将'NSStringEncoding'(又名'unsigned long')隐式转换为'NSCharacterSet * _Nonnull'
在下面的代码我收到错误消息:ARC禁止将'NSStringEncoding'(又名'unsigned long')隐式转换为'NSCharacterSet * _Nonnull' 我在哪里做错了? NSURL *candidatesURL = [NSURL URLWithString:[str_url str...