tf默认文字修改

    NSAttributedString* tfPhoneAttibutedString = [[NSAttributedStringalloc]initWithString:@"XXXX码"attributes:@{NSForegroundColorAttributeName:kRGB(219,219,219),NSFontAttributeName:REGULAR15FONT}];

    self.sss.attributedPlaceholder= tfPhoneAttibutedString;