相信大家總會(huì)碰到需要encode的時(shí)候，接著百度啊，然后發(fā)現(xiàn)stringByAddingPercentEscapesUsingEncoding這個(gè)方法，但是這個(gè)方法有時(shí)候無(wú)法對(duì)+等符號(hào)進(jìn)行encode。那這時(shí)候咋辦呢？

//encode

CF_EXPORT

CFStringRef CFURLCreateStringByAddingPercentEscapes(CFAllocatorRef allocator, CFStringRef originalString, CFStringRef charactersToLeaveUnescaped, CFStringRef legalURLCharactersToBeEscaped, CFStringEncoding encoding);

NSString *encodedValue = (NSString*)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(nil,(CFStringRef)value, nil,(CFStringRef)@"!*'();:@&=+$,/ %#[]", kCFStringEncodingUTF8));