Question

我正在尝试使用.xib文件在iOS中创建可编辑的表格视图。

我的代码如下所示：

viewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UITableViewController

@property (nonatomic, strong) NSMutableArray *notes;

@end

viewController.m

#import "ViewController.h"
#import "Note.h"

@interface ViewController ()

@end

@implementation ViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self setEditing:NO animated:NO];
}

- (void)viewWillAppear:(BOOL)animated{

    self.notes = [[Note savedNotes]mutableCopy];
    [self.tableView reloadData];
}

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

#pragma mark - Button Events

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:animated];

    if (editing) {
        UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
        self.navigationItem.leftBarButtonItem = cancelButton;

        UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(rightButtonPressed:)];

        self.navigationItem.rightBarButtonItem = doneButton;

    }else{
        self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
                                                                                             target:self
                                                                                             action:@selector(addNoteButtonPressed:)];

        UIBarButtonItem *editButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemEdit
                                                                                   target:self
                                                                                   action:@selector(rightButtonPressed:)];

        self.navigationItem.rightBarButtonItem = editButton;
    }

}

- (void)rightButtonPressed:(id)sender{

    [self setEditing:!self.isEditing animated:YES];
}

- (void)cancelButtonPressed:(id)sender{
    [self setEditing:!self.isEditing animated:YES];
}

- (void)addNoteButtonPressed:(id)sender{
    //ATTViewController *viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"ATTViewController"];
    //[self.navigationController pushViewController:viewController animated:YES];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [self.notes count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    // Configure the cell...

    Note *note = self.notes[indexPath.row];

    cell.textLabel.text = note.name;
    cell.detailTextLabel.text = note.event;

    return cell;
}


// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return YES;
}

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewCellEditingStyleDelete;
}


// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        Note *note = self.notes[indexPath.row];
        [note remove];
        [self.notes removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath]
                         withRowAnimation:UITableViewRowAnimationFade];
    }
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }
}


/*
 // Override to support rearranging the table view.
 - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
 {
 }
 */

/*
 // Override to support conditional rearranging of the table view.
 - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
 {
 // Return NO if you do not want the item to be re-orderable.
 return YES;
 }
 */

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.
    /*
     <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
     // ...
     // Pass the selected object to the new view controller.
     [self.navigationController pushViewController:detailViewController animated:YES];
     */
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

@end

在.xib的身份检查器中，我将类从 UIView 更改为 UITableView 。

我将视图与数据源和/或代理连接起来（我尝试了所有组合）。

然而我手机上什么都没有。我不知道桌面视图，只是一个空白的灰色屏幕。

任何想法我做错了什么？上面的代码在使用故事板的项目中工作，现在我正在尝试使用.xib文件。

屏幕截图：

enter image description here

Answer 1

我建议查看免费的Sensible TableView框架。将自动处理显示您的阵列并代表您处理所有插入/删除。为我节省了大量时间。

Answer 2

经过一些工作，我能够做到并决定将其公之于众：

Code on GitHub

我正在学习如何做到这一点，但我想支持移动，删除和添加。

有些例子只显示了最后一行的添加按钮，其他只显示了移动/删除。

对我来说，棘手的一点是同时支持3。

希望它有所帮助。

以下是代码：

的 EditTVC.h 的

#import <UIKit/UIKit.h> @interface EditTVC : UITableViewController @end

的 EditTVC.m 的

// // EditTVC.m // editTableViewTest // #import "EditTVC.h" @interface EditTVC () @property (nonatomic) NSMutableArray *myItems; @end @implementation EditTVC @synthesize myItems; - (void)viewDidLoad { [super viewDidLoad]; myItems = [[NSMutableArray alloc] init]; for (int i=0; i<5; i++) { [myItems addObject:[NSString stringWithFormat:@"Hey %d",i]]; } NSLog(@"%@",myItems); // Display an Edit button in the navigation bar for this view controller. self.navigationItem.rightBarButtonItem = self.editButtonItem; } #pragma mark - Table view data source - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. if (self.editing) { return myItems.count +1; } return myItems.count; } -(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.row == myItems.count) return UITableViewCellEditingStyleInsert; else return UITableViewCellEditingStyleDelete; } - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the item to be re-orderable. if (indexPath.row == myItems.count) return NO; else return YES; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"MyCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; // Configure the cell... if (self.editing && indexPath.row == myItems.count) { cell.textLabel.text = @"Add ..."; } else { cell.textLabel.text = myItems[indexPath.row]; } return cell; } -(void)setEditing:(BOOL)editing animated:(BOOL)animated { [super setEditing:editing animated:animated]; if(editing) { //edit mode } else { //non-edit mode } [self.tableView reloadData]; } // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source [myItems removeObjectAtIndex:indexPath.row]; [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view [myItems insertObject:[NSString stringWithFormat:@"Added %ld",(long)indexPath.row] atIndex:indexPath.row]; [tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade]; } NSLog(@"%@",myItems); } // Override to support rearranging the table view. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { if (toIndexPath.row == myItems.count) //we only check the toIndexPath because we made the AddCell not to respond to move events { id tmp = [myItems objectAtIndex:fromIndexPath.row]; [myItems removeObjectAtIndex:fromIndexPath.row]; [myItems insertObject:tmp atIndex:toIndexPath.row-1]; //to keep it in valid range for the NSMutableArray [self.tableView reloadData]; } else { id tmp = [myItems objectAtIndex:fromIndexPath.row]; [myItems removeObjectAtIndex:fromIndexPath.row]; [myItems insertObject:tmp atIndex:toIndexPath.row]; } NSLog(@"%@",myItems); } @end

Answer 3

向数组中添加至少一个项目，否则将不显示任何内容（目前您的cellForRowAtIndexPath返回0）。另外，请确保将tableView的委托分配给IB中的类。

在iOS中创建可编辑的表格视图？

3 个答案: