ios - UITableview 不显示内容/空单元格

Question

我仍在学习 iOS，这是我的第一个主要项目，所以请放轻松。我正在尝试制作一个手势驱动的任务列表。我还有很多工作要做，但我希望你们能帮助我完成这项工作。我确定我正确设置了委托(delegate)和数据源，但它仍然没有显示...无论如何，这是我的 ViewController.m 文件。

提前致谢!

#import "AGViewController.h"
#import "AGTaskObject.h"
#import "AGTableViewCell.h"

//#import "AGSettingsViewController.h"


@interface AGViewController ()

@end

@implementation AGViewController {

    NSMutableArray *taskItems;
}

-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self)
    {
        //Initializing the Array
        taskItems = [[NSMutableArray alloc] init];

        [taskItems addObject:[AGTaskObject toDoItemWithText:@"Tap the + to add a Task"]];
        [taskItems addObject:[AGTaskObject toDoItemWithText:@"Tap the Gear Button to check out settings"]];
        [taskItems addObject:[AGTaskObject toDoItemWithText:@"Swipe Right to check off a task"]];
        [taskItems addObject:[AGTaskObject toDoItemWithText:@"Swipe Left to Delete a Task"]];
        [taskItems addObject:[AGTaskObject toDoItemWithText:@"I <3 Bacon"]];
    }
        return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    //Table View Delegates
    self.tableView.delegate = self;
    self.tableView.dataSource = self;

    //set the initial background image
    self.tableView.backgroundColor = [UIColor clearColor];
    self.backgroundImage.image = [UIImage imageNamed:@"blue.png"];
    [self.tableView registerClass:[AGTableViewCell class] forCellReuseIdentifier:@"cell"];

    //Get rid of empty cells at bottom of tableview
//    self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];

    // Long Press Gesture to rearrange cells
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureRecognized:)];
    [self.tableView addGestureRecognizer:longPress];

//    // Tap Gesture to add a new cell
//    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(<#selector#>)];
}

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

#pragma mark - Button Press (IB)Actions

- (IBAction)settingsButtonPressed:(UIButton *)sender
{
    [self performSegueWithIdentifier:@"toSettingsViewController" sender:nil];
}

- (IBAction)addTaskButtonPressed:(UIButton *)sender
{  
}

#pragma mark - UITableView Configuration

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

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cellIdentifier = @"cell";
    //re-Use  or create a tableview cell
    AGTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier
                                                            forIndexPath:indexPath];
/*    if (cell == nil) {
        cell = [[AGTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
  */

    //Make the cells clear to show the background image
    cell.backgroundColor = [UIColor clearColor];
    //default font color will be white
    cell.textLabel.textColor = [UIColor whiteColor];
    //Set the task for each cell in the tableview
    AGTaskObject *item = taskItems[indexPath.row];
    //set the text
    cell.delegate = self;
    cell.taskObject = item;

    // Recall final cell
    return cell;
}

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    cell.backgroundColor = [self colorForIndex:indexPath.row];
}

#pragma mark - TableItem Delete

-(void)toDoItemDeleted:(id)taskobject {
    // use the UITableView to animate the removal of this row
    NSUInteger index = [taskItems indexOfObject:taskobject];
    [self.tableView beginUpdates];
    [taskItems removeObject:taskobject];
    [self.tableView deleteRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:index inSection:0]]
                          withRowAnimation:UITableViewRowAnimationFade];
    [self.tableView endUpdates];
}

Answer 1

Storyboard不使用 initWithNibName(即使 Xcode 毫无意义地创建它)所以您的数组是空的。尝试将其移动到 viewDidLoad