UITableViewController不加载数据

Question

我是iOS开发新手，我有一个UITableViewController，我想在表中加载NSMutableArray数据，但它会加载数据并显示一个空表。这是代码：

#import "PhotosTableViewController.h"


@implementation PhotosTableViewController
NSMutableArray *photos;

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

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    photos = [[NSMutableArray alloc] init];
    Photo *pic = [[Photo alloc] init];
    [pic setName:@"over look"];
    [pic setFilename:@"overlook.png"];
    [pic setNotes:@"this is notw!"];
    [photos addObject:pic];

    pic = [[Photo alloc] init];
    [pic setName:@"olives"];
    [pic setFilename:@"olives.png"];
    [pic setNotes:@"this is notw!"];
    [photos addObject:pic];

}

- (void)viewDidUnload
{
    [super viewDidUnload];

}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

#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 [photos count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"PhotoCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    // Configure the cell...
    Photo *current=[photos objectAtIndex:indexPath.row];
    cell.textLabel.text=[current name];
    return cell;
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.

}

@end

Answer 1

Le Sigh 您会惊讶地发现，通过“让您的班级成为委托和数据源”来解决许多UITableView问题。在IB中，将出口拖到文件所有者。在代码中，设置tableView.delegate = self;和tableView.datasource = self;

Answer 2

在[self.view reloadData];实施结束时添加viewDidLoad。

如果这没有帮助，我怀疑你的viewController实际上不是PhotoTableViewController类型。确保正确设置。如果通过InterfaceBuilder完成，请检查viewController的类型并确保它显示为PhotoTableViewController。