1.NSString 方法

stringByAddingPercentEncodingWithAllowedCharacters? 需要傳一個(gè)??NSCharacterSet? 對(duì)象

如[NSCharacterSet ?URLQueryAllowedCharacterSet]

URLFragmentAllowedCharacterSet "#%<>[\]^`{|}

URLHostAllowedCharacterSet? ? ? "#%/<>?@\^`{|}

URLPasswordAllowedCharacterSet? "#%/:<>?@[\]^`{|}

URLPathAllowedCharacterSet? ? ? "#%;<>?[\]^`{|}

URLQueryAllowedCharacterSet? ? "#%<>[\]^`{|}

URLUserAllowedCharacterSet? ? ? "#%/:<>?@[\]^`

2. ?

let customAllowedSet = NSCharacterSet(charactersInString:"`#%^{}\"[]|\\<> ").invertedSet

NSString *urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[[NSCharacterSet characterSetWithCharactersInString:@"?!@#$^&%*+,:;='\"`<>()[]{}/\\| "] invertedSet]];