/**decode编码*/-(NSString*)encodeToPercentEscapeString{NSString*outputStr=(__bridgeNSString*)CFURLCreateStringByAddingPercentEscapes(NULL,/*allocator*/(__bridgeCFStringRef)self,NULL,/*charactersToLeaveUnescaped*/(CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8);returnoutputStr;}/**decode解码*/-(NSString*)decodeFromPercentEscapeString{NSMutableString*outputStr=[NSMutableStringstringWithString:self];[outputStrreplaceOccurrencesOfString:@"+"withString:@""options:NSLiteralSearchrange:NSMakeRange(0,[outputStrlength])];return[outputStrstringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];}