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IOS之表视图单元格删除、移动及插入

作者：佚名      IOS开发编辑：admin      更新时间：2022-07-23

 

1.实现单元格的删除，实现效果如下

   

Cpp代码 复制代码 收藏代码
  1. - (void)viewDidLoad  
  2. {  
  3.     [super viewDidLoad];  
  4.     //设置导航栏  
  5.      self.editButtonItem.title = @"编辑";  
  6.     self.navigation.rightBarButtonItem = self.editButtonItem;  
  7.     [self initTableViewData];  
  8.     // Do any additional setup after loading the view.  
  9. }  
  10.   
  11. - (void)didReceiveMemoryWarning  
  12. {  
  13.     [super didReceiveMemoryWarning];  
  14.     // Dispose of any resources that can be recreated.  
  15. }  
  16.   
  17. -(void)initTableViewData{  
  18.     NSBundle *bundle = [NSBundle mainBundle];  
  19.     NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];  
  20.     dataArr = [[NSMutableArray alloc] initWithContentsOfFile:plistPath];  
  21. }  
  22.   
  23. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section  
  24. {  
  25.     return [dataArr count];  
  26. }  
  27.   
  28. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
  29. {  
  30.     static NSString *CellIdentifier = @"tableCell";  
  31.     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
  32.       
  33.     NSUInteger row = [indexPath row];  
  34.     NSDictionary *rowDict = [dataArr objectAtIndex:row];  
  35.     cell.textLabel.text =  [rowDict objectForKey:@"itemName"];  
  36.     NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);  
  37.       
  38.     NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];  
  39.     cell.imageView.image = [UIImage imageNamed:imagePath];  
  40.     NSLog(@"cell.image.image  =  %@",imagePath);  
  41.       
  42.     cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;  
  43.       
  44.     return cell;  
  45. }  
  46.   
  47. //选中Cell响应事件  
  48. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{  
  49.     [tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失  
  50.     NSUInteger row = [indexPath row];  
  51.     NSDictionary *rowDict = [dataArr objectAtIndex:row];  
  52.     NSString *userName =  [rowDict objectForKey:@"itemName"];  
  53.     NSLog(@"userName=%@",userName);  
  54. }  
  55.   
  56. //返回编辑状态的style  
  57. - (UITableViewCellEditingStyle)tableView:(UITableView *)tableView  
  58.            editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath  
  59. {  
  60.     //UITableViewCellEditingStyleInsert  
  61. //    return UITableViewCellEditingStyleNone;  
  62.     return UITableViewCellEditingStyleDelete;  
  63. }  
  64. //完成编辑的触发事件  
  65. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle  
  66. forRowAtIndexPath:(NSIndexPath *)indexPath  
  67. {  
  68.     if (editingStyle == UITableViewCellEditingStyleDelete)  
  69.     {  
  70.         [dataArr removeObjectAtIndex: indexPath.row];  
  71.         //        [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]  
  72.         //                         withRowAnimation:UITableViewRowAnimationFade];  
  73.         [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]  
  74.                          withRowAnimation:UITableViewRowAnimationFade];  
  75.         [tableView reloadData];  
  76.     }   
  77. }  
  78. //UIViewController生命周期方法，用于响应视图编辑状态变化  
  79. - (void)setEditing:(BOOL)editing animated:(BOOL)animated {  
  80.     [super setEditing:editing animated:animated];  
  81.       
  82.     [self.tableView setEditing:editing animated:YES];  
  83.     if (self.editing) {  
  84.      self.editButtonItem.title = @"完成";  
  85.     } else {  
  86.         self.editButtonItem.title = @"编辑";  
  87.     }  
  88. }  
  89. @end  
- (void)viewDidLoad
{
    [super viewDidLoad];
    //设置导航栏
     self.editButtonItem.title = @"编辑";
    self.navigation.rightBarButtonItem = self.editButtonItem;
    [self initTableViewData];
	// Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)initTableViewData{
    NSBundle *bundle = [NSBundle mainBundle];
    NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];
    dataArr = [[NSMutableArray alloc] initWithContentsOfFile:plistPath];
}

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"tableCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    NSUInteger row = [indexPath row];
    NSDictionary *rowDict = [dataArr objectAtIndex:row];
    cell.textLabel.text =  [rowDict objectForKey:@"itemName"];
    NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);
    
    NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];
    cell.imageView.image = [UIImage imageNamed:imagePath];
    NSLog(@"cell.image.image  =  %@",imagePath);
    
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    
    return cell;
}

//选中Cell响应事件
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];//选中后的反显颜色即刻消失
    NSUInteger row = [indexPath row];
    NSDictionary *rowDict = [dataArr objectAtIndex:row];
    NSString *userName =  [rowDict objectForKey:@"itemName"];
    NSLog(@"userName=%@",userName);
}

//返回编辑状态的style
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView
           editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //UITableViewCellEditingStyleInsert
//    return UITableViewCellEditingStyleNone;
    return UITableViewCellEditingStyleDelete;
}
//完成编辑的触发事件
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {
        [dataArr removeObjectAtIndex: indexPath.row];
        //        [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
        //                         withRowAnimation:UITableViewRowAnimationFade];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                         withRowAnimation:UITableViewRowAnimationFade];
        [tableView reloadData];
    } 
}
//UIViewController生命周期方法，用于响应视图编辑状态变化
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
    [super setEditing:editing animated:animated];
    
    [self.tableView setEditing:editing animated:YES];
    if (self.editing) {
     self.editButtonItem.title = @"完成";
    } else {
        self.editButtonItem.title = @"编辑";
    }
}
@end

 2.移动单元格

 

Cpp代码 复制代码 收藏代码
  1. //完成移动的触发事件，不添加该方法不实现移动功能  
  2. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath*)sourceIndexPath  
  3.       toIndexPath:(NSIndexPath *)destinationIndexPath  
  4. {  
  5.     NSDictionary *item = [dataArr objectAtIndex:sourceIndexPath.row];  
  6.     [dataArr removeObjectAtIndex:sourceIndexPath.row];  
  7.     [dataArr insertObject:item atIndex:destinationIndexPath.row];  
  8. }  
//完成移动的触发事件，不添加该方法不实现移动功能
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath*)sourceIndexPath
      toIndexPath:(NSIndexPath *)destinationIndexPath
{
    NSDictionary *item = [dataArr objectAtIndex:sourceIndexPath.row];
    [dataArr removeObjectAtIndex:sourceIndexPath.row];
    [dataArr insertObject:item atIndex:destinationIndexPath.row];
}

 3.添加单元格。下面是自定义触发事件，即单击左下角的add按钮

Cpp代码 复制代码 收藏代码
  1. - (IBAction)addistItem:(UIBarButtonItem *)sender {  
  2.     AppUtils *appUtils = [AppUtils alloc];  
  3.     //需要先初始化一个UIAlertView  
  4.     UIAlertView *alert = [UIAlertView alloc];  
  5.     [appUtils showInputDialogWithTitle:@"add" message:@"please input new user name:" toAlertView:alert confirmAction:(^{  
  6.         //得到输入框  
  7.         UITextField *textField=[alert textFieldAtIndex:0];  
  8. //        不要写成NSMutableDictionary *newItem = [NSDictionary dictionary];  
  9.         NSMutableDictionary *newItem = [NSMutableDictionary dictionary];  
  10.         [newItem setObject:textField.text forKey:@"itemName"];  
  11.         [newItem setObject:@"1.jpeg" forKey:@"itemImagePath"];  
  12.         [dataArr addObject:newItem];  
  13.         [self.tableView reloadData];  
  14.     })];  
  15. }  
- (IBAction)addistItem:(UIBarButtonItem *)sender {
    AppUtils *appUtils = [AppUtils alloc];
    //需要先初始化一个UIAlertView
    UIAlertView *alert = [UIAlertView alloc];
    [appUtils showInputDialogWithTitle:@"add" message:@"please input new user name:" toAlertView:alert confirmAction:(^{
        //得到输入框
        UITextField *textField=[alert textFieldAtIndex:0];
//        不要写成NSMutableDictionary *newItem = [NSDictionary dictionary];
        NSMutableDictionary *newItem = [NSMutableDictionary dictionary];
        [newItem setObject:textField.text forKey:@"itemName"];
        [newItem setObject:@"1.jpeg" forKey:@"itemImagePath"];
        [dataArr addObject:newItem];
        [self.tableView reloadData];
    })];
}

 4.附上·AppUtils类

Cpp代码 复制代码 收藏代码
  1. #import "AppUtils.h"  
  2. #include "RIButtonItem.h"  
  3. #include "UIAlertView+Blocks.h"  
  4.   
  5. @implementation AppUtils  
  6.   
  7. //弹出警告框，并实现警告框按钮的触发事件  
  8. - (void)showInputDialogWithTitle:(NSString *)title message:(NSString *)message toAlertView:(UIAlertView*) alert confirmAction:(void(^)(void))action{  
  9.     RIButtonItem* cancelItem = [RIButtonItem item];  
  10.     cancelItem.label = @"No";  
  11.     cancelItem.action = ^  
  12.     {  
  13.         //为NO时的处理  
  14.         UITextField *tf=[alert textFieldAtIndex:0];  
  15.         NSLog(@"UITextField=%@",tf.text);  
  16.     };  
  17.       
  18.     RIButtonItem* confirmItem = [RIButtonItem item];  
  19.     confirmItem.label = @"Yes";  
  20. //    confirmItem.action = action;  
  21.     alert = [alert initWithTitle:title  
  22.                                                     message:message  
  23.                                            cancelButtonItem:cancelItem  
  24.                                            otherButtonItems:confirmItem, nil];  
  25.       
  26.     alert.alertViewStyle = UIAlertViewStylePlainTextInput;  
  27.       
  28.     confirmItem.action = action;  
  29.     [alert show];  
  30. }  
  31. @end  
#import "AppUtils.h"
#include "RIButtonItem.h"
#include "UIAlertView+Blocks.h"

@implementation AppUtils

//弹出警告框，并实现警告框按钮的触发事件
- (void)showInputDialogWithTitle:(NSString *)title message:(NSString *)message toAlertView:(UIAlertView*) alert confirmAction:(void(^)(void))action{
    RIButtonItem* cancelItem = [RIButtonItem item];
    cancelItem.label = @"No";
    cancelItem.action = ^
    {
        //为NO时的处理
        UITextField *tf=[alert textFieldAtIndex:0];
        NSLog(@"UITextField=%@",tf.text);
    };
    
    RIButtonItem* confirmItem = [RIButtonItem item];
    confirmItem.label = @"Yes";
//    confirmItem.action = action;
    alert = [alert initWithTitle:title
                                                    message:message
                                           cancelButtonItem:cancelItem
                                           otherButtonItems:confirmItem, nil];
    
    alert.alertViewStyle = UIAlertViewStylePlainTextInput;
    
    confirmItem.action = action;
    [alert show];
}
@end