Question

我正在尝试找出将UITableView数据的内容显示到HTML电子邮件正文中的最佳方式。

每个表格单元格都有一个日期和说明，它们位于自定义UITableViewCell类中。

问题在于我使用大量基于核心数据的日期计算来显示UITableView中的结果，这意味着我必须复制所有这些以创建HTML数据的数据因为我不是简单地将核心数据转储到表中，而是显示计算的日期。

据我所知，我的选择是：

当我对cellForRowAtIndexPath方法中的每个日期进行计算时，我可以将结果添加到NSMutableDictionary，然后循环创建HTML数据。
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找出循环遍历表格中单元格数据的方法。我想尝试走这条路线，因为在某些时候可能需要允许用户手动“覆盖”计算的日期，所以我希望这是导出为HTML的日期。

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这是电子邮件代码，如果它有助于理解我正在尝试做什么。我正在试图从阵列中拉出物品，但没有成功。

// name of array is results


if ([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
    [mailer setSubject:subject];

    NSString *emailTop = [NSString stringWithFormat:@"<html><body><table border=1><tr><th>Date</th><th>Event</th></tr>"];


    for(int i=0;i<[self.results count];i++){

        NSString *expDate = [self.results objectAtIndex:i];
        NSString *expDesc = [self.results objectAtIndex:i]];

        emailBody = [NSString stringWithFormat:@"<tr><td>%@</td><td>%@</td><tr>",expDate,expDesc];

    }

    NSString *emailBottom = [NSString stringWithFormat:@"</table></body></html>"];
    NSString *emailComplete = [NSString stringWithFormat:@"%@%@%@",emailTop,emailBody,emailBottom];


    [mailer setMessageBody:emailComplete isHTML:YES];
    [self presentViewController:mailer animated:YES completion:nil];

}

根据要求...注意结果数组是原始核心数据拉，不要与我试图为每个单元格数据创建的数组混淆

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"CellResults";

// Configure the cell...

ResultsCell *resultscell = (ResultsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSManagedObject *result = [self.results objectAtIndex:indexPath.row];


NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMMM dd, yyyy"];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];

//  populate the cells
[resultscell.labelEventDesc setText:[NSString stringWithFormat:@"%@",[result valueForKey:@"eventdesc"]]];
[resultscell.labelWeeksOut setText:[NSString stringWithFormat:@"-%@ weeks",[result valueForKey:@"weeksout"]]];


//  calculate the event dates
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];

NSString *weeks = [NSString stringWithFormat:@"-%@",[result valueForKey:@"weeksout"]];
int intWeeks = [weeks intValue];

[offsetComponents setWeek:intWeeks];

NSString *wkday = [NSString stringWithFormat:@"%@",[result valueForKey:@"dow"]];
int targetWeekday = [wkday intValue];


NSDate *eventDt= [gregorian dateByAddingComponents:offsetComponents toDate:[self trialDate] options:0];
NSDateFormatter* dateF = [[NSDateFormatter alloc] init];
[dateF setDateFormat:@"EEEE, MMMM dd, yyyy"];
[dateF setTimeZone:[NSTimeZone localTimeZone]];

if (targetWeekday==0) {

    //  if there is no preference for a specific day of week
    NSString *eventDtforDisplay = [dateF stringFromDate:eventDt];
    resultscell.labelEventDesc.numberOfLines=0;
    [resultscell.labelEventDesc sizeToFit];
    [resultscell.textEventDate setText:[NSString stringWithFormat:@"%@",eventDtforDisplay]];


} else {

    //if there is a day of week preference
    NSDateComponents *fComp = [gregorian components:NSCalendarUnitWeekday fromDate:eventDt];
    NSInteger weekday = fComp.weekday;

    NSDateComponents *c = [[NSDateComponents alloc]init];

    c.day = targetWeekday - weekday;

    NSDate *resultDate = [gregorian dateByAddingComponents:c toDate:eventDt options:0];
    NSDateFormatter* newDateF = [[NSDateFormatter alloc] init];
    [newDateF setDateFormat:@"EEEE, MMMM dd, yyyy"];
    [newDateF setTimeZone:[NSTimeZone localTimeZone]];
    NSString *eventDtforDisplay = [newDateF stringFromDate:resultDate];
    resultscell.labelEventDesc.numberOfLines=0;
    [resultscell.labelEventDesc sizeToFit];
    [resultscell.textEventDate setText:[NSString stringWithFormat:@"%@",eventDtforDisplay]];
}

    return resultscell;

}

使用NSMutableDictionary将UITableView数据发送到HTML电子邮件正文

0 个答案: