如何添加多个视图和删除视图并在删除后从视图中获取所有数据？

Posted 2023-03-12

【中文标题】如何添加多个视图和删除视图并在删除后从视图中获取所有数据？

【英文标题】：How to add multipile views and delete view and get all the data from the the views after deleting?

【发布时间】：2017-01-12 10:31:13

【问题描述】：

我想用一个文本字段创建多个视图，现在我必须在单击 + 按钮时创建多个视图，如果单击 - 按钮，则视图必须删除。我确实使用了这段代码。

@interface ViewController ()

IBOutlet UITableView *viewsTbl;
IBOutlet UIButton *addBtn;
NSMutableArray *countArr;
NSMutableDictionary *dataArr;
NSInteger number;


@end

@implementation ViewController

- (void)viewDidLoad 
[super viewDidLoad];
countArr = [NSMutableArray array];
dataArr = [NSMutableDictionary dictionary];
[dataArr setValue:@"" forKey:@"TextFieldOne"];
[dataArr setValue:@"" forKey:@"TextFieldTwo"];
[countArr addObject:dataArr];


// Do any additional setup after loading the view, typically from a nib.


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

   return  countArr.count;

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

ViewTableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"ViewTableViewCell"];
if (cell == nil) 
    cell = [[[NSBundle mainBundle] loadNibNamed:@"ViewTableViewCell" owner:self options:nil] objectAtIndex:0];

if (countArr.count == indexPath.row+1)

    cell.buttonPlus.hidden = NO;

else

    cell.buttonPlus.hidden = YES;


NSDictionary *dict = countArr[indexPath.row];
cell.txtFldOne.text = dict[@"TextFieldOne"];
cell.txtFldTwo.text = dict[@"TextFieldTwo"];

cell.txtFldTwo.delegate = self;
cell.txtFldOne.delegate = self;
cell.txtFldOne.tag = indexPath.row;
cell.txtFldTwo.tag = indexPath.row+1000;
[cell.buttonPlus addTarget:self action:@selector(plusBtnClick) forControlEvents:UIControlEventTouchUpInside];
[cell.buttonMinus addTarget:self action:@selector(minusBtnClick:) forControlEvents:UIControlEventTouchUpInside];

cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;

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

  return 150;


-(void)plusBtnClick

dataArr = [NSMutableDictionary dictionary];
[dataArr setValue:@"" forKey:@"TextFieldOne"];
[dataArr setValue:@"" forKey:@"TextFieldTwo"];
[countArr addObject:dataArr];
[viewsTbl reloadData];


-(IBAction)minusBtnClick:(id)sender

CGPoint buttonPosition = [sender convertPoint:CGPointZero toView:viewsTbl];
NSIndexPath *indexPath = [viewsTbl indexPathForRowAtPoint:buttonPosition];
NSLog(@"%@",indexPath);
[countArr removeObjectAtIndex:indexPath.row];
[viewsTbl reloadData];
if (countArr.count == 0)

    addBtn.hidden = NO;
    viewsTbl.hidden = YES;


else

    addBtn.hidden = YES;
    viewsTbl.hidden = NO;




-(IBAction)addBtnClick:(id)sender

dataArr = [NSMutableDictionary dictionary];
[dataArr setValue:@"" forKey:@"TextFieldOne"];
[dataArr setValue:@"" forKey:@"TextFieldTwo"];
[countArr addObject:dataArr];
addBtn.hidden = YES;
viewsTbl.hidden = NO;
[viewsTbl reloadData];

现在的问题是，我在视图控制器中添加了一个名为 print 的按钮并单击它，在文本字段中输入的数据必须添加到字典或数组中。

【参考方案1】：

您还可以使用文本文件委托保存数据

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

CGPoint buttonPosition = [textField convertPoint:CGPointZero toView:viewsTbl];
NSIndexPath *indexPath = [viewsTbl indexPathForRowAtPoint:buttonPosition];
NSString *text = [textField.text stringByReplacingCharactersInRange:range withString:string];
dataArr = [NSMutableDictionary dictionaryWithDictionary:countArr[indexPath.row]];
 NSMutableDictionary *datadict = [NSMutableDictionary dictionary];
if (number == indexPath.row)

    [datadict setValue:text forKey:@"TextFieldOne"];
    [datadict setValue:dataArr[@"TextFieldTwo"] forKey:@"TextFieldTwo"];


else if(number == indexPath.row +1000)

    [datadict setValue:dataArr[@"TextFieldOne"] forKey:@"TextFieldOne"];
    [datadict setValue:text forKey:@"TextFieldTwo"];


[countArr replaceObjectAtIndex:indexPath.row withObject:datadict];

return YES;

- (void)textFieldDidBeginEditing:(UITextField *)textField

 number = textField.tag;