2018-03-23-IOS提交参数实行编码

[aString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; //等价于 [aString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:@"`#%^{}\"[]|\\<> "]];

字符集

URLHostAllowedCharacterSet "#%/<>?@\^`{|} URLFragmentAllowedCharacterSet "#%<>[\]^`{|} URLPasswordAllowedCharacterSet "#%/:<>?@[\]^`{|} URLPathAllowedCharacterSet "#%;<>?[\]^`{|} URLQueryAllowedCharacterSet "#%<>[\]^`{|} URLUserAllowedCharacterSet "#%/:<>?@[\]^`