• Encode:

NSString *url = @"http://haocold.com?location=中国";
[url stringByAddingPercentEncodingWithAllowedCharacters:NSCharacterSet.URLQueryAllowedCharacterSet];
NSURL *URL = [NSURL URLWithString:url];

• Decode:

NSString *url = URL.absoluteString;
url = [url stringByRemovingPercentEncoding];

一款轻量级的布局框架，自动布局

https://github.com/xjh093/JHFrameLayout