Question

假设自定义单元格A＆amp; B高度不同 自定义单元格A在UITableView上加载默认值。当用户选择单元格A 时，它将删除该单元格并将单元格B 添加到该位置，反之亦然。它将以手风琴风格进行重新调整大小的动画。

Answer 1

要做到这一点，你应该在数据数组中有一个属性（或键，如果使用字典）来跟踪每个indexPath上你想要的单元格，并使用cellFroRowAtIndexPath中的if-else语句将正确的单元格出列。在didSelectRowAtIndexPath中，您将检查该属性，将其设置为相反的属性，然后重新加载该表。您还需要实现heightForRowAtIndexPath，并检查相同的属性以确定要返回的高度。

编辑后：

如果您只需要跟踪一个选定的单元格，那么创建一个属性（我称之为selectedPath）来保存该值并在heightForRowAtIndexPath和cellForRowAtIndexPath中进行检查。我在故事板中创建了两个单元格，一个是简单的UITableViewCell，另一个是RDCell类的自定义单元格。我不确定这是否会给你想要的动画，但试一试，看看它是否接近：

#import "TableController.h"
#import "RDCell.h"

@interface TableController ()
@property (strong,nonatomic) NSArray *theData;
@property (nonatomic) NSIndexPath *selectedPath;
@end

@implementation TableController 


- (void)viewDidLoad {
    [super viewDidLoad];
    self.theData = @[@"One",@"Two",@"Three",@"Four",@"Five",@"Six",@"Seven",@"Eight"];
    self.selectedPath = [NSIndexPath indexPathForRow:-1 inSection:0];
    [self.tableView reloadData];
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.theData.count;
}


-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

    if ([self.selectedPath isEqual:indexPath]) {
        return 90;
    }else{
        return 44;
    }

}

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

    if ([self.selectedPath isEqual:indexPath]) {
        RDCell *cell = [tableView dequeueReusableCellWithIdentifier:@"RDCell" forIndexPath:indexPath];
        cell.label.text = self.theData[indexPath.row];
        return cell;

    }else{
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
        cell.textLabel.text = self.theData[indexPath.row];
        return cell;
    }
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    NSIndexPath *oldPath = self.selectedPath;
    self.selectedPath = indexPath;
    [self.tableView reloadRowsAtIndexPaths:@[indexPath,oldPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}

Answer 2

 **Got this amazing Solution, its working great...**






 @implementation NetworkCentreTable
    {
        NSMutableArray *arr;
        BOOL chk;
        int onSelectCount;
        NSIndexPath *onSelectTrack;
    }
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        arr=[[NSMutableArray alloc] initWithObjects:@"1",@"1",@"1",@"1",@"1",@"1",@"1",@"1",@"1",nil];
        onSelectCount=0;
        static NSString *CellIdentifier1 = @"NetworkCell2";
        UINib *nib = [UINib nibWithNibName:@"NetworkCentreCellBig" bundle:nil];
        [self.tblNetworkCentre registerNib:nib forCellReuseIdentifier:CellIdentifier1]; 
    }

    #pragma mark -
    #pragma mark Custom Network TableView delegate and Datasource

    -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
        return [arr count];
    }

    -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
        return 1;
    }


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


        static NSString *CellIdentifier1 = @"NetworkCentreCell";
        static NSString *CellIdentifier2 = @"NetworkCentreCellBig";


        if(self.selectedRowIndex && indexPath.row == self.selectedRowIndex.integerValue)

        {
            NetworkCentreCell *cell = (NetworkCentreCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier2];
            UIViewController *controller=[[UIViewController alloc] initWithNibName:CellIdentifier2 bundle:nil];
            cell=(NetworkCentreCell *)controller.view;
            return cell;
        }
        else
        {
            NetworkCentreCell *cell = (NetworkCentreCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier1];
            UIViewController *controller=[[UIViewController alloc] initWithNibName:CellIdentifier1 bundle:nil];
            cell=(NetworkCentreCell *)controller.view;
            return cell;

        }


    }

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
        onSelectCount++;
        NSLog(@"num=%d",onSelectCount);
        self.selectedIndexPath = indexPath;
        [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation: UITableViewRowAnimationNone];
        self.selectedRowIndex = [NSNumber numberWithInteger:indexPath.row]; 
        [self.tblNetworkCentre deselectRowAtIndexPath:indexPath animated:YES];

        //First we check if a cell is already expanded.
        //If it is we want to minimize make sure it is reloaded to minimize it back
       if( onSelectCount==1 )
        {
             [tableView beginUpdates];
            NSIndexPath *previousPath = [NSIndexPath indexPathForRow:self.selectedRowIndex.integerValue inSection:0];
            self.selectedRowIndex = [NSNumber numberWithInteger:indexPath.row];
            onSelectTrack=indexPath;
            [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:previousPath] withRowAnimation:UITableViewRowAnimationFade];
            [tableView endUpdates];

        }
       if(onSelectTrack.row!=indexPath.row)
       {
           [tableView beginUpdates];
           [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:onSelectTrack] withRowAnimation:UITableViewRowAnimationFade];
            [tableView endUpdates];

           onSelectTrack=indexPath;
           onSelectCount=0;
           [self tableView:tableView didSelectRowAtIndexPath:onSelectTrack];

       }

        if(self.selectedRowIndex.integerValue == indexPath.row && onSelectCount==2)
            {
             [tableView beginUpdates];
            self.selectedRowIndex = [NSNumber numberWithInteger:-1];
            [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
            onSelectCount=0;
            [tableView endUpdates];

        }


    }

    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {


       if(self.selectedRowIndex && indexPath.row == self.selectedRowIndex.integerValue)

        {

            return 280;
        }else{
            return 85;
        }


    }

Answer 3

您可以在didSelectRowAtIndexPath方法中调用[yourTableview reloadData]。然后在numberOfRowsInSection中给出一个新的计数。在heightForRowAtIndexpath中指定自定义高度。在cellForRowAtIndexpath中添加自定义单元格。

将现有的自定义单元格A替换为手风琴样式中的另一个自定义单元格B - 选择时

3 个答案: