urlstring专题
'Invalid parameter not satisfying: URLString'
需要在网络请求前对URL进行编码， requestProperties = [requestProperties stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
![[URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; URL 请求前先加入这个](/front/images/it_default.jpg)
[URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; URL 请求前先加入这个
NSString URLString; NSURL *URL = [ NSURL URLWithString :[URLString stringByAddingPercentEscapesUsingEncoding : NSUTF8StringEncoding ]];