Trung tâm cá nhân
cuốn sách gpt4 ai đã làm

ios - 数组未通过委托(delegate)从 TableView 传递到 View Controller

In lại Tác giả: Walker 123 更新时间：2023-11-29 01:44:12 26 4
mua khóa gpt4 Nike

我正在尝试将数组从 TableView Controller 复制到 View Controller 。我已经多次检查代码，似乎没问题。 

//Delegate class
    #import 

    @protocol Category 
    @required
    -(void) delegateMethodForCategory : (NSMutableArray *) arrayOfCategory;


    @kết thúc

    @interface Categories : UIViewController 

    @property (nonatomic) id delegate;
    @property (nonatomic,strong) NSArray *sports;
    @property (strong, nonatomic) IBOutlet UITableView *tableview;
    @property (nonatomic,strong) NSMutableArray *selectedIndexes;

    @kết thúc

//Delegate methods
    #import "Categories.h"
    @interface Categories ()
    {
           NSMutableArray *array ;
    }
    @kết thúc

    @implementation Categories

    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        _sports= [[NSArray alloc] initWithObjects: @"Baseball", @"Soccer", @"Hockey",
                  @"Other",nil];


    }

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

    #pragma mark - Table view data source

    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
        // Return the number of sections.
        trả về 1;
    }

    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
        // Return the number of rows in the section.
        return _sports.count;
    }

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
        array = [[NSMutableArray alloc]init];

        // Configure the cell...

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


    -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
        UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];

        NSString *cellText = selectedCell.textLabel.text;
        if([tableView cellForRowAtIndexPath:indexPath].accessoryType==UITableViewCellAccessoryNone)
        { [tableView cellForRowAtIndexPath:indexPath].accessoryType=UITableViewCellAccessoryCheckmark;
            [array addObject:cellText];

        }else if([tableView cellForRowAtIndexPath:indexPath].accessoryType==UITableViewCellAccessoryCheckmark){
            [tableView cellForRowAtIndexPath:indexPath].accessoryType=UITableViewCellAccessoryNone;
            [array removeObject:cellText];

        }


    }
    - (IBAction)doneButton:(id)sender {
        [self.delegate delegateMethodForCategory:array];
        [self dismissViewControllerAnimated:YES completion:nil];

    }

    @kết thúc
    #import 
    #import "Categories.h"

    @interface ActivityCreator : UIViewController 
    @property (nonatomic) Categories *requestClass;

    @property (nonatomic,strong) NSMutableArray *arrayOfSports;

    @kết thúc

//This class implements delegate
    import "ActivityCreator.h"

    @interface ActivityCreator ()

    @kết thúc

    @implementation ActivityCreator

    - (void)viewDidLoad {
        [super viewDidLoad];
        [self settingUp];
        // Do any additional setup after loading the view.
    }

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


    -(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller{
        return UIModalPresentationNone;
    }


    -(void)settingUp{
        _requestClass = [[Categories alloc]init];
        self.requestClass.delegate = self;

    }

    #pragma mark - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

        if([segue.identifier isEqualToString:@"hubabuba"]){
            Categories *pop = (Categories *)segue.destinationViewController;
            pop.modalPresentationStyle = UIModalPresentationPopover;
            pop.popoverPresentationController.delegate = self;

        }
    }

    -(void) delegateMethodForCategory : (NSMutableArray *) arrayOfCategory {
        _arrayOfSports = arrayOfCategory;
        NSLog(@"%@",_arrayOfSports);

    }

任何我做错的指导都会有很大帮助。已经坚持了一段时间。

委托(delegate)方法根本没有被调用。

Cảm ơn

câu trả lời hay nhất

在 prepareForSegue 方法中设置 Categories 类的委托(delegate)，而不是在 settingUp 方法中设置。

Viết

 pop.delegate = self;

在 prepareForSegue 方法中。

关于ios - 数组未通过委托(delegate)从 TableView 传递到 View Controller ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32101651/

26 4 0
Đề xuất bài viết: ios - 当用户在 Swift 中加载 View 时立即进入相机
Đề xuất bài viết: ios - -[AVMvidFrameDecoder advanceToFrame :] 'framebuffer num bytes' 中的 AVAnimator 断言失败
Đề xuất bài viết: mysql - CONCAT 行并在 GROUP 中返回
Đề xuất bài viết: ios - 如何根据下载完成的百分比更改图标？
Walker 123
Hồ sơ

Tôi là một lập trình viên xuất sắc, rất giỏi!

Nhận phiếu giảm giá taxi Didi miễn phí
Phiếu giảm giá taxi Didi
Các bài viết phổ biến trên toàn bộ trang web
Chứng chỉ ICP Bắc Kinh số 000000
Hợp tác quảng cáo: 1813099741@qq.com 6ren.com
Xem sitemap của VNExpress