Question

我正在尝试第一次创建表格视图，并且不会显示信息。这就是我做的： 1.将表格视图拖到我的视图控制器（故事板）上 2.提出了Assitent编辑器和schedule.h文件。 3. ctrl从视图控制器拖动到schedule.h文件以添加属性。 4，将其命名为mTable。 5.添加代码（在视图上加载）

tableData = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto", @"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee", @"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", @"Instant Noodle with Egg", @"Noodle with BBQ Pork", @"Japanese Noodle with Pork", @"Green Tea", @"Thai Shrimp Cake", @"Angry Birds Cake", @"Ham and Cheese Panini", nil];
// Do any additional setup after loading the view.
mTable.delegate=self;

然后6.添加方法

////////////////////////////////////////////////////////////////////////////////////////////////
// functions to handle table
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [tableData count];
}

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    }

    cell.textLabel.text = [tableData objectAtIndex:indexPath.row];
    return cell;
}

我的代码：

#import <UIKit/UIKit.h>

@interface cSchedule : UIViewController <UITableViewDelegate, UITableViewDataSource>
{
    NSArray *tableData;

    __weak IBOutlet UITableView *mTable;

   }

@end

- (void)viewDidLoad
{
    [super viewDidLoad];
    tableData = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto", @"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee", @"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", @"Instant Noodle with Egg", @"Noodle with BBQ Pork", @"Japanese Noodle with Pork", @"Green Tea", @"Thai Shrimp Cake", @"Angry Birds Cake", @"Ham and Cheese Panini", nil];
    // Do any additional setup after loading the view.
    mTable.delegate=self;

}


////////////////////////////////////////////////////////////////////////////////////////////////
// functions to handle table
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [tableData count];
}

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    }

    cell.textLabel.text = [tableData objectAtIndex:indexPath.row];
    return cell;
}

Answer 1

您没有告诉您的表格查看数据源的位置。

- (void)viewDidLoad
{
    [super viewDidLoad];
    tableData = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto", @"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee", @"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", @"Instant Noodle with Egg", @"Noodle with BBQ Pork", @"Japanese Noodle with Pork", @"Green Tea", @"Thai Shrimp Cake", @"Angry Birds Cake", @"Ham and Cheese Panini", nil];
    // Do any additional setup after loading the view.
    mTable.delegate=self;
}

应该是

- (void)viewDidLoad
{
    [super viewDidLoad];
    tableData = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto", @"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee", @"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", @"Instant Noodle with Egg", @"Noodle with BBQ Pork", @"Japanese Noodle with Pork", @"Green Tea", @"Thai Shrimp Cake", @"Angry Birds Cake", @"Ham and Cheese Panini", nil];
    // Do any additional setup after loading the view.
    mTable.delegate=self;
    mTable.dataSource=self;
}

委托是表格视图在执行操作时所使用的内容（例如，当它被触摸时），而数据源负责显示的实际数据（如cellForRowAtIndexPath）。因此，您的方法现在不会被调用，并且该表认为它没有可显示的数据。

Answer 2

设置UITableViewDataSource

- (void)viewDidLoad
{

    [super viewDidLoad];
    tableData = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto", @"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee", @"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", @"Instant Noodle with Egg", @"Noodle with BBQ Pork", @"Japanese Noodle with Pork", @"Green Tea", @"Thai Shrimp Cake", @"Angry Birds Cake", @"Ham and Cheese Panini", nil];

    mtable.delegate = self;

    mtable.dataSource = self;

}

我的表视图没有显示任何内容

2 个答案: