TableView和Detail视图单元格显示-TableViewandDetailviewcelldisplay

I'm learning how to make a contact using TableView and navigation controller. I have done the first view page with some cells, but I have some problem with showing the cells on the detail view page of each cell from first view. when tap the Group A, Group B, Group C on first view page, it goes to the detail view of each cell, it should show cells named A1 A2 A3, B1 B2 B3 or C1 C2 C3 according to my code on detail view page. but it display nothing. Hope someone can give me some advises, thank you so much!

我正在学习如何使用TableView和导航控制器进行联系。我已经完成了第一个包含一些单元格的视图页面,但是我在第一个视图中显示每个单元格的详细视图页面上的单元格时遇到了一些问题。当在第一个视图页面上点击A组,B组,C组时,它会进入每个单元格的详细视图,它应该根据详细视图页面上的代码显示名为A1 A2 A3,B1 B2 B3或C1 C2 C3的单元格。但它什么都没显示。希望有人能给我一些建议,非常感谢你!

FirstViewController.m

@implementation FirstViewController
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSections(NSInteger)section{

    return [self.contactArray count];
}

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *Celldentifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Celldentifier];

if (cell == NULL) {
    cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:Celldentifier];

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

}

-(void)tableView: (UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    self.myTableView = [self.contactArray objectAtIndex:indexPath.row];
    [self performSegueWithIdentifier:@"To Second View Segue" sender:self];     
}


-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if([segue.identifier isEqualToString:@"To the second view"]){
        NSIndexPath *indexpath = [self.myTableView indexPathForSelectedRow];
        self.cOntactArray= [self.contactArray objectAtIndex:indexpath.row];
        SecondViewController *vc = segue.destinationViewController;
        vc.memberName = [self.contactArray objectAtIndex:indexpath.row];
        vc.title = vc.memberName;

    }
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.cOntactArray= [[NSMutableArray alloc]initWithObjects:@"Group A",@"Group B",@"Group C", nil];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
 }

@end

SecondViewController.m

@implementation SecondViewController{

NSArray *groupA;
NSArray *groupB;
NSArray *groupC;

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    if([self.memberName isEqualToString:@"groupA"]){
        return [groupA count];
    }
    else if([self.memberName isEqualToString:@"groupB"]){
        return [groupB count];
    }
    else if([self.memberName isEqualToString:@"groupC"]){
        return [groupC count];
    }
    return 0;
}

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *Celldentifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Celldentifier];

    if (cell == NULL) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:Celldentifier];

    }
    if([self.memberName isEqualToString:@"groupA"]){
        cell.textLabel.text = [groupA objectAtIndex:indexPath.row];
    }
    if([self.memberName isEqualToString:@"groupB"]){
        cell.textLabel.text = [groupB objectAtIndex:indexPath.row];
    }
    if([self.memberName isEqualToString:@"groupC"]){
        cell.textLabel.text = [groupC objectAtIndex:indexPath.row];
    }

    return cell;

}

- (void)viewDidLoad {
    [super viewDidLoad];
    groupA = [NSArray arrayWithObjects:@"A1",@"A2",@"A3",nil];
    groupB = [NSArray arrayWithObjects:@"B1",@"B2",@"B3",nil];
    groupC = [NSArray arrayWithObjects:@"C1",@"C2",@"C3",nil];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

@end

first view

detail view but nothing displayed

细节视图,但没有显示

1 个解决方案