Question

我在谷歌搜索了很多次，但无法找到我想要的内容。我在表格视图中有一个自定义单元格，其中有三个标签和一个删除按钮。现在我想删除我单击删除按钮的特定行。所以，我只想知道在删除按钮的ibAction方法中要编写的代码是什么。提前谢谢。

这是我的ViewController.m

#import "ViewController.h"
#import "detailObject.h"

@interface ViewController ()

@end


@implementation ViewController


- (void)viewDidLoad {
    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.
    self.arrPeopleDetail = [[NSMutableArray alloc]init];
}

- (IBAction)submitButton:(id)sender {
    if ([self.phoneTextField.text isEqualToString:@""] && [self.addressTextField.text isEqualToString:@""] && [self.phoneTextField.text isEqualToString:@""] ) {
        UIAlertView *alrt = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Please Fillup The Above Fields" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
        [alrt show];
    }
    else if ([self.nameTextField.text isEqualToString:@""]) {
        UIAlertView *alrt_name = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Plaeas Enter Name" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil ];
        [alrt_name show];
    }
    else if ([self.addressTextField.text isEqualToString:@""]) {
        UIAlertView *alrt_address = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Please Enter Address" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
        [alrt_address show];
    }
    else if ([self.phoneTextField.text isEqualToString:@""]) {
        UIAlertView *alrt_phoneNumber = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Please Enter Phone Number" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
        [alrt_phoneNumber show];
    }
    else
    {
        detailObject *peopleDetail = [[detailObject alloc] init];
        peopleDetail.strPeopleName = self.nameTextField.text;
        peopleDetail.strPeopleAddress = self.addressTextField.text;
        peopleDetail.strPeoplePhoneNumber = self.phoneTextField.text;

        [self.arrPeopleDetail addObject:peopleDetail];

        self.nameTextField.text = @"";
        self.addressTextField.text = @"";
        self.phoneTextField.text = @"";
    }
    [self.detailTable reloadData];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell1"];

    UILabel *lbl1 = (UILabel*)[cell.contentView viewWithTag:1];
    lbl1.text = [[self.arrPeopleDetail objectAtIndex:indexPath.row]valueForKey:@"strPeopleName"];

    UILabel *lbl2 = (UILabel*)[cell.contentView viewWithTag:2];
    lbl2.text = [[self.arrPeopleDetail objectAtIndex:indexPath.row]valueForKey:@"strPeopleAddress"];

    UILabel *lbl3 = (UILabel*)[cell.contentView viewWithTag:3];
    lbl3.text = [[self.arrPeopleDetail objectAtIndex:indexPath.row]valueForKey:@"strPeoplePhoneNumber"];

    return cell;
}

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


- (IBAction)deleteButtonTapped:(id)sender {
    [self.arrPeopleDetail removeLastObject];
    [self.detailTable reloadData];
}

@end

Answer 1

模式通常是这样的：

-(void)deleteButtonTapped:(id)sender
{
    // ------------------------------------------------
    // Sender is your button
    //
    // We're finding the coordinate of 
    // where we tap on the screen, relative
    // to our tableView
    // ------------------------------------------------
    CGPoint touchPoint = [sender convertPoint:CGPointZero toView:self.tableView];

    // ------------------------------------------------
    // Now we use this coordinate to find 
    // the row where we tap on our tableView.
    // ------------------------------------------------
    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:touchPoint];

    // ------------------------------------------------
    // now we have the table row (indexPath.row) 
    // we can use it to delete from our data source
    // ------------------------------------------------

    [self.arrItems removeObjectAtIndex:indexPath.row];

    // refresh inteface after updating data source
    [self.tableView reloadData];
}

Answer 2

首先，deleteButtonTapped:需要知道按下了哪个单元格删除按钮的索引。在tableView:cellForRowAtIndexPath:设置按钮的标记。例如，

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell1"];
    [cell.deleteButton setTag:indexPath.row];
    [cell.deleteButton add target:@selector(deleteButtonTapped:) for state : UIControlStateTouchupinside];
    return cell;
}

现在，您可以从deleteButtomTapped:获取行索引。

- (IBAction)deleteButtonTapped:(UIButton*)sender {

    [self.arrPeopleDetail  removeObjectAtIndex:sender.tag];
    [self.detailTable reloadData];
}

如果您使用deleteRowsAtIndexPaths withRowAnimation:代替reloadData，则会有删除动画。

Answer 3

在Tableview的cellForRowAtIndexPath函数中，为删除按钮设置tag属性。 <DELETE_BUTTON>.tag = indexPath.row。然后在删除功能中，您将获得单击的索引。删除该索引中的对象并重新加载表。

- (IBAction)deleteButtonTapped:(id)sender {
int index = [sender tag];
[self.arrPeopleDetail removeObjectAtIndex:index];
[self.detailTable reloadData];

}

Answer 4

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell  = [tblObj dequeueReusableCellWithIdentifier:@"myCell"];

    if (cell==nil)
    {
      NSArray *arr = [[NSBundle mainBundle]loadNibNamed:@"myCell" owner:self
                                                options:nil];
        cell = [arr objectAtIndex:0];
    }

    UILabel *lbl1 = (UILabel *)[cell viewWithTag:1];
    lbl1.text = [arr1 objectAtIndex:indexPath.row];


    UIButton *btn = (UIButton *)[cell viewWithTag:2];
    btn.tag = indexPath.row;

    [btn addTarget:self action:@selector(btnPress:) forControlEvents:UIControlEventTouchUpInside];

    return cell;
}

-(IBAction)btnPress:(UIButton *)btn
{
    [arr1 removeObjectAtIndex:btn.tag];

    NSIndexPath *indexPath=[NSIndexPath indexPathForRow:btn.tag inSection:0];
    [tblObj beginUpdates];
    [tblObj deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    [tblObj endUpdates];
    [tblObj reloadData];

}

单击按钮时如何删除特定行？

4 个答案: