ios - 从未调用过 cellForRowAtIndexPath

Question

我知道之前有人问过这个问题，但我还没有找到这个特定问题的答案。我已逐步按照苹果教程进行操作，但我无法在表格 View 中看到我的数据。

问题是函数“cellForRowAtIndexPath”从未被调用，尽管 numberOfSectionsInTableView 返回 1 并且 numberOfRowsInSection 也返回。

这是我的代码:

#import "StudentListTableViewController.h"
#import "Student.h"
@interface StudentListTableViewController ()



@end

@implementation StudentListTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self loadInitialData];

    NSLog(@"yes");


    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    NSLog(@"NUMBERS OF SECTION IN TABLE");
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    NSLog(@"NUMBER OF ROWS");

    return self.studentList.count;
}



-(void) loadInitialData
{
    NSLog(@"LOAD INITIAL DATA");
    self.studentList = [[NSMutableArray alloc] init];
    Student* s1 = [[Student alloc] init];
    s1.firstName = @"moses";
    s1.lastName = @"gonzales";
    s1.phoneNumber = @"050-20202020";
    s1.studentID = @"90123456";

   /* Student* s2 = [[Student alloc] init];
    s2.firstName = @"roman";
    s2.lastName= @"wolf";
    s2.phoneNumber = @"050123456789";
    s2.studentID = @"39393939";
    */


}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"prototypeCell" forIndexPath:indexPath];
    NSLog(@"fcell");
    // Configure the cell...
    Student* s = [self.studentList objectAtIndex:indexPath.row];

    cell.textLabel.text = s.firstName;

    return cell;
}

和平:)

Answer 1

您的 self.studentList 是空数组，因此它返回 0 作为计数。如果 UITableView 有 0 个部分，则它不会调用其 cellForRowAtIndexPath:。尝试更改您的 loadInitialData 方法。(将 s1 添加到 self.studentList)。