我的表格視圖什么也沒顯示

Question

我正在嘗試首次創建表視圖，但該信息未顯示。 我就是這樣做的：1.將表視圖拖到我的視圖控制器（故事板）上。2.調出Assitent編輯器和schedule.h文件。 3. ctrl從視圖控制器拖動到schedule.h文件以添加屬性。 4，將其命名為mTable。 5.添加代碼（在視圖加載時）

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;
}

我的代碼：

#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

您沒有在告訴表視圖數據源在哪里。

- (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;
}

應該

- (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;
}

委托是表視圖在執行操作時（例如在觸摸時）使用的內容，而數據源負責顯示的實際數據（例如cellForRowAtIndexPath ）。 因此，您的方法現在不會被調用，並且該表認為它沒有要顯示的數據。

Answer 2

設置您的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;

}