表视图单元格 - UITableView - 无法在详细视图中显示多行

Posted 2023-02-27

【中文标题】表视图单元格 - UITableView - 无法在详细视图中显示多行

【英文标题】：Table View Cell - UITableView - Cannot show multiple rows in detailed view

【发布时间】：2015-09-05 09:21:59

【问题描述】：

我正在使用 Tableview 来显示来自 recipes Array 的 Name，效果很好，并在来自 recipes Array 的表格视图中显示所有名称。当我点击其中一个食谱时，它会在详细视图中显示名称。

我的困惑是，如何在 detailed view 中显示其他字段。我有一个数组 (array name: ingredients)，其中包含特定配方的内容，例如成分。

我试过了

cell.textLabel.text = [ingredients objectAtIndex:indexPath.row];

RecipeDetailViewController.h

#import <UIKit/UIKit.h>

@interface RecipeDetailViewController : UIViewController

@property (nonatomic, strong) IBOutlet UILabel *recipeLabel;
@property (nonatomic, strong) NSString *recipeName;

@property (strong, nonatomic) IBOutlet UILabel *recipeCountry;
@property (nonatomic, strong) NSString *recipeCountryName;

@end

但它在 RecipeBookViewController.m 中没有显示任何内容 这是我的原始代码

#import "RecipeBookViewController.h"
#import "RecipeDetailViewController.h"

@interface RecipeBookViewController ()

@end

@implementation RecipeBookViewController 
    NSArray *recipes;


@synthesize tableView;

- (void)viewDidLoad

    [super viewDidLoad];


    NSData *allCourseData=[[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://api.kivaws.org/v1/loans/search.json?status=fundraising"]];

    NSError *error;
    NSMutableDictionary *JsonObject = [NSJSONSerialization
                                       JSONObjectWithData:allCourseData options:NSJSONReadingMutableContainers
                                       error:&error];

    NSArray *loans = JsonObject[@"loans"];
    // Create a new loans array for store the new items
    NSMutableArray *newLoans = [NSMutableArray array];
    NSMutableArray *arrCountry = [NSMutableArray array];


    for (NSDictionary *loan in loans) 
        NSNumber *ident = loan[@"id"];
        NSString *name = loan[@"name"];
        NSDictionary *description = loan[@"description"];
        NSDictionary *location = loan[@"location"];
        NSString *country = location[@"country"];
        NSString *status = loan[@"status"];

        NSDictionary *geo = location[@"geo"];
        NSString *geoprint = geo[@"pairs"];

        [newLoans addObject:name];
        [arrCountry addObject:country];
    
    recipes=newLoans;




- (void)viewDidUnload

    [super viewDidUnload];
    // Release any retained subviews of the main view.


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);



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

    return [recipes count];


//Display Name in Detail View
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

    static NSString *simpleTableIdentifier = @"RecipeCell";

    //Displays name
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) 
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    

    cell.textLabel.text = [recipes objectAtIndex:indexPath.row];

    return cell;



- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
    if ([segue.identifier isEqualToString:@"showRecipeDetail"]) 
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        RecipeDetailViewController *destViewController = segue.destinationViewController;
        destViewController.recipeName = [recipes objectAtIndex:indexPath.row];
    



@end

RecipeDetailViewController.m

#import "RecipeDetailViewController.h"

@interface RecipeDetailViewController ()

@end

@implementation RecipeDetailViewController

@synthesize recipeLabel;
@synthesize recipeName;
@synthesize recipeCountry;
@synthesize recipeCountryName;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) 
        // Custom initialization
    
    return self;


- (void)viewDidLoad

    [super viewDidLoad];
    // Set the Label text with the selected recipe
    recipeLabel.text = recipeName;
    recipeCountry.text=recipeCountryName;


- (void)viewDidUnload

    [super viewDidUnload];
    // Release any retained subviews of the main view.


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

    return (interfaceOrientation == UIInterfaceOrientationPortrait);


@end

这是两个视图的屏幕截图

【问题讨论】：

您需要向我们展示显示详细视图的代码。

@deadbeef 我添加了 RecipeDetailViewController.m 的代码

显示您导航到 RecipeDetailVIewController 的位置，并显示您的主/成分数组数据。

显示你的 'didSelectRowAtIndexPath' 委托方法。

@Shoaib 代码已更新

【参考方案1】：

循环中的变化；

for (NSDictionary *loan in loans) 
        NSNumber *ident = loan[@"id"];
        NSString *name = loan[@"name"];
        NSDictionary *description = loan[@"description"];
        NSDictionary *location = loan[@"location"];
        NSString *country = location[@"country"];
        NSString *status = loan[@"status"];

        NSDictionary *geo = location[@"geo"];
        NSString *geoprint = geo[@"pairs"];

        [newLoans addObject:@[
          @"name":name,
          @"description":description,
          @"country ":country 
        ]]; // Same way add all keys

        //Or
        /*
        NSMutableDictionary* dicData = [NSMutableDictionary dictionary];
        newLoans[@"name"] = name;
        newLoans[@"description"] = description;
        newLoans[@"country"] = country;
        [newLoans addObject:dicData];
        */

    
    recipes=newLoans;

检索时改变；

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

   . . . 
   NSDictionary * dict = [recipes objectAtIndex:indexPath.row];
   cell.textLabel.text = dict[@"name"];

    return cell;

以同样的方式将完整的字典传递给 RecipeDetailViewController 并在那里显示其他信息。

【讨论】：

这个想法是在你的数组中有一个字典而不是单个字符串。我没有机会在 xcode 中测试代码，因此您必须自己更正语法错误（如果有）。 BTW 更新了帖子。

我的代码已经在使用 cell.textLabel.text = [recipes objectAtIndex:indexPath.row];我的问题是如何在其中添加一个带有国家名称的数组作为 cell.textLabel.text = [countryname objectAtIndex:indexPath.row];