NSString去空格和换行

NSString* headerData=@"阿斯达阿萨德按时大大a                     

大声道

啊实打实";

headerData = [headerData stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];  //去除掉首尾的空白字符和换行字符

       headerData = [headerDatastringByReplacingOccurrencesOfString:@" " withString:@""];

       headerData = [headerDatastringByReplacingOccurrencesOfString:@" " withString:@""];