Question

我是新手，我真的被卡住了，不知道该怎么做

我遵循了一个关于如何制作一个uitableview的教程，并用来自nsmutablearray的数据填充它一切都很好，直到这里

我想为我的应用添加更多关于单元格“字幕”的描述我使用另一个可变数组并在tableview中显示

现在，当我按下单元格时，它会转到详细视图，只显示单元格标题

我不知道如何将字幕文本链接到另一个标签

请帮助

这是我的main.h

@property（非原子，强）NSMutableArray *对象; @属性   （非原子的，强大的）NSMutableArray *数字; @property（非原子的，   strong）NSMutableArray *结果; @property（非原子，强）   NSMutableArray * resultsnumber;

@property（非原子，强）IBOutlet UISearchBar * searchBar;

这是我的main.m

#import "main.h"
#import "DetailView.h"

@interface MasterTableViewController ()

@end

@implementation MasterTableViewController

- (NSMutableArray *)objects
{
    if (!_objects) {
        _objects = [[NSMutableArray alloc] init];
    }

    return _objects;
}

- (NSMutableArray *)numbers
{
    if (!_numbers) {
        _numbers = [[NSMutableArray alloc] init];
    }

    return _numbers;
}


- (NSMutableArray *)results
{
    if (!_results) {
        _results = [[NSMutableArray alloc] init];
    }

    return _results;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Add some objects to our array
    [self.objects addObject:@"YouTube"];
    [self.objects addObject:@"Google"];
    [self.objects addObject:@"Yahoo"];
    [self.objects addObject:@"Apple"];
    [self.objects addObject:@"Amazon"];
    [self.objects addObject:@"Bing"];
    [self.objects addObject:@"Udemy"];
    [self.objects addObject:@"Flickr"];

    [self.numbers addObject:@"1"];
    [self.numbers addObject:@"2"];
    [self.numbers addObject:@"3"];
    [self.numbers addObject:@"4"];
    [self.numbers addObject:@"5"];
    [self.numbers addObject:@"6"];
    [self.numbers addObject:@"7"];
    [self.numbers addObject:@"8"];

}


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

- (void)searchThroughData
{
    self.results = nil;


    NSPredicate *resultsPredicate = [NSPredicate predicateWithFormat:@"SELF contains [search] %@", self.searchBar.text];
    self.results = [[self.objects filteredArrayUsingPredicate:resultsPredicate] mutableCopy];


}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
    [self searchThroughData];
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.tableView) {
        return self.objects.count;
    } else {
        [self searchThroughData];
        return self.results.count;
    }
}

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

    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    if (tableView == self.tableView) {
        cell.textLabel.text = self.objects[indexPath.row];
       cell.detailTextLabel.text = self.numbers[indexPath.row];
    } else {
        cell.textLabel.text = self.results[indexPath.row];

    }

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (self.searchDisplayController.isActive) {
        [self performSegueWithIdentifier:@"ShowDetail" sender:self];
    }
}

if ([[segue identifier] isEqualToString:@"ShowDetail"]) {
NSString *object = nil;
NSString *numbers = nil;

NSIndexPath *indexPath = nil;

if (self.searchDisplayController.isActive) {
    indexPath = [[self.searchDisplayController searchResultsTableView] indexPathForSelectedRow];
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
    object = cell.textLabel.text;
     numbers = cell.detailTextLabel.text;

} else {
    indexPath = [self.tableView indexPathForSelectedRow];
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
    object = cell.textLabel.text;
     numbers = cell.detailTextLabel.text;
}

[[segue destinationViewController] setDetailLabelContents:object];



    }
}

@end

这是我的详细视图。

#import <UIKit/UIKit.h>

@interface DetailViewController : UIViewController

@property (strong, nonatomic) NSString *detailLabelContents;
@property (strong, nonatomic) NSString *numberdetailLabelContents;

@property (weak, nonatomic) IBOutlet UILabel *detailLabel;
@property (weak, nonatomic) IBOutlet UILabel *numberdetailLabel;

这是我的详细视图.m

#import "DetailView.h"
#import "main.h"


@interface DetailViewController ()

@end

@implementation DetailViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Set the label text
    self.detailLabel.text = self.detailLabelContents;

}

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

@end

我希望有人可以提供帮助

Answer 1

您在prepareForSegue中的这部分代码是脆弱的：

if (self.searchDisplayController.isActive) {
            indexPath = [[self.searchDisplayController searchResultsTableView] indexPathForSelectedRow];
            object = self.results[indexPath.row];

        } else {
            indexPath = [self.tableView indexPathForSelectedRow];
            object = self.objects[indexPath.row];
        }

它很脆弱，因为您从结果数组中获取详细文本，而不是从单元格本身获取详细文本标签。尝试获取指向所选单元格的指针，并将其detailTextLabel传递给您的detailViewController。确保在MasterTableViewController中将IBOutlet设置为tableView。我将在此示例中将其命名为resultsTableView。

if (self.searchDisplayController.isActive) {
            indexPath = [[self.searchDisplayController searchResultsTableView] indexPathForSelectedRow];
            UITableViewCell *cell = [self.resultsTableView cellForRowAtIndexPath:indexPath];
            object = cell.detailTextLabel.text;

        } else {
            indexPath = [self.tableView indexPathForSelectedRow];
            UITableViewCell *cell = [self.resultsTableView cellForRowAtIndexPath:indexPath];
            object = cell.detailTextLabel.text;
        }

DetailViewController *detailVC = [segue destinationViewController];
detailVC.detailLabelContents = numbers;

如果有效，请告诉我们！

将字幕从uitableview推送到详细视图

1 个答案: