ios - 如何使用 SectionHeaderTitle 在 TableView 中设置数组？

Question

This is my array and i set in TableView with Section Wise.this array is Dynamically so that value is Increase or decrease.

Set Date in Header Section Title

Same date value is included in One Section.

那么 TableView 的方法是什么，我用 Section wise 在表中设置数据。

({
    date = "2016-07-09 06:46:00 +0000";
    heartrate = 89;
},
    {
    date = "2016-07-07 06:46:00 +0000";
    heartrate = 88;
},
    {
    date = "2016-07-06 06:46:00 +0000";
    heartrate = 90;
},
    {
    date = "2016-07-09 06:46:00 +0000";
    heartrate = 102;
},
    {
    date = "2016-07-07 06:46:00 +0000";
    heartrate = 98;
},
    {
    date = "2016-07-07 06:46:00 +0000";
    heartrate = 97;
})

Here I set Image and I want to set like this with section wise row set.

Answer 1

尝试做如下(希望这会解决你的问题)-

1- 采用全局 NSMutableArray 即 resultArray；

2- 在创建数组的地方添加这些代码行(也可以使用动态数组大小)-

resultArray = [NSMutableArray new];

NSArray *groupsDate = [yourArray valueForKeyPath:@"@distinctUnionOfObjects.date"];
   // for sorted array- [[yourArray valueForKeyPath:@"@distinctUnionOfObjects.date"]sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];

for (NSString *groupDateValue in groupsDate)
{
    NSMutableDictionary *newDict = [NSMutableDictionary new];

    [newDict setObject:groupDateValue forKey:@"date"];

    NSArray *groupRate = [yourArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"date = %@", groupDateValue]];

    [newDict setObject:groupRate forKey:@"heartrate"];

    [resultArray addObject:newDict];
}

NSLog(@"result %@",resultArray);

现在添加tableView dataSource/Delegate 方法-

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

    return resultArray.count;

}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    NSArray *rowC=[[resultArray objectAtIndex:section]valueForKey:@"heartrate"];

    return rowC.count;

}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{


    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 30)];

    UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(3, 0, tableView.frame.size.width/2-5, 30)];

    [label1 setFont:[UIFont fontWithName:@"HelveticaNeue-Medium" size:16]];

    [label1 setTextColor:[UIColor whiteColor]];

    [label1 setText:[self getDateFromString:[[resultArray valueForKey:@"date"]objectAtIndex:section]]];

    [label1 setTextAlignment:NSTextAlignmentLeft];

    [view addSubview:label1];

    [view setBackgroundColor:[UIColor darkGrayColor]];

    return view;

}

-(NSString *)getDateFromString:(NSString *)string
{

    NSString * dateString = [NSString stringWithFormat: @"%@",string];

    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss +0000"];
    NSDate* myDate = [dateFormatter dateFromString:dateString];

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"dd MMM yyyy"];
    NSString *stringFromDate = [formatter stringFromDate:myDate];

    return stringFromDate;
}


-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

        cell.textLabel.text=[NSString stringWithFormat:@"Heart Rate = %@",[[[[resultArray objectAtIndex:indexPath.section]valueForKey:@"heartrate"] valueForKey:@"heartrate"] objectAtIndex:indexPath.row]];

    cell.detailTextLabel.text=[NSString stringWithFormat:@"%@",[[[[resultArray objectAtIndex:indexPath.section]valueForKey:@"heartrate"] valueForKey:@"date"] objectAtIndex:indexPath.row]];


    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

NSLog(@"date=%@ and heartRate= %@",[[[[resultArray objectAtIndex:indexPath.section]valueForKey:@"heartrate"] valueForKey:@"date"] objectAtIndex:indexPath.row],[[[[resultArray objectAtIndex:indexPath.section]valueForKey:@"heartrate"] valueForKey:@"heartrate"] objectAtIndex:indexPath.row]);
}

这是输出屏幕-