// ------------title ---------
    NSMutableAttributedString *attTitleString = [[NSMutableAttributedString alloc] initWithString:titleString];
    [_alertController setValue:attTitleString forKey:@"attributedTitle"];
    
    // -----------message --------
    NSMutableAttributedString *attMsgString = [[NSMutableAttributedString alloc] initWithString:messageString];
    // 設定字型
    [attMsgString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14] range:NSMakeRange(0, attMsgString.length)];
    // 設定顏色
    [attMsgString addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0, 10)];
    
    NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
    // 設定行間距
    [paragraph setLineSpacing:3];
    // 設定段間距
    [paragraph setParagraphSpacingBefore:5];
    // 設定對齊方式
    [paragraph setAlignment:NSTextAlignmentLeft];
    // 設定書寫方向
    [paragraph setBaseWritingDirection:NSWritingDirectionLeftToRight];
    [attMsgString addAttribute:NSParagraphStyleAttributeName value:paragraph range:NSMakeRange(0, attMsgString.length)];
    [_alertController setValue:attMsgString forKey:@"attributedMessage"];
    
    // ----按鈕顏色------
    NSArray *actionArr = [_alertController actions];
    [actionArr.firstObject setTitle:alertTitle];
    [actionArr.firstObject setValue:[UIColor orangeColor] forKey:@"titleTextColor"];