使用 Data.plist 时向表中添加披露按钮

Posted 2023-03-21

【中文标题】使用 Data.plist 时向表中添加披露按钮

【英文标题】：Adding Disclosure Buttons to a Table when using Data.plist

【发布时间】：2011-05-30 07:20:05

【问题描述】：

我从 data.plist 创建了一个表格，并试图弄清楚如何在二级到三级表格中添加披露按钮。它将用于向制作图片的学生艺术家添加 UIView“学分”。但是，我需要确保名称可以更改，因为该表将容纳来自不同学生的不同文件。例如，案例 1-3 都是 Aubrey 的作品，案例 4-6 是 Josh 的作品，等等。

任何帮助都会很棒。

#import "RootViewController.h"
#import "DrillDownAppAppDelegate.h"
#import "DetailViewController.h"
#import "ImageViewController.h"

@implementation RootViewController

@synthesize tableDataSource, CurrentTitle, CurrentLevel;


- (void)viewDidLoad 
    [super viewDidLoad];

    if(CurrentLevel == 0) 

        //Initialize our table data source
        NSArray *tempArray = [[NSArray alloc] init];
        self.tableDataSource = tempArray;
        [tempArray release];

        DrillDownAppAppDelegate *AppDelegate = (DrillDownAppAppDelegate *)[[UIApplication sharedApplication] delegate];
        self.tableDataSource = [AppDelegate.data objectForKey:@"Rows"];

        self.navigationItem.title = @"Electromagnetism";
    
    else 
        self.navigationItem.title = CurrentTitle;   


- (void)didReceiveMemoryWarning 
    [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
    // Release anything that's not essential, such as cached data


#pragma mark Table view methods

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



// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
    return [self.tableDataSource count];



// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) 
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    

    // Set up the cell...
    NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
    cell.text = [dictionary objectForKey:@"Title"];

    return cell;



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

    //Get the dictionary of the selected data source.
    NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];

    //Get the children of the present item.
    NSArray *Children = [dictionary objectForKey:@"Children"];

    if([Children count] == 0) 
        NSInteger ViewNumber = [[dictionary objectForKey:@"View"] integerValue];
        switch (ViewNumber) 
            case 1: 

                ImageViewController *ivc = [[ImageViewController alloc] initWithNibName:@"ImageView" bundle:[NSBundle mainBundle]];
                ivc.ImageName = @"Magnets_History_Aubrey.jpg";
                [self.navigationController pushViewController:ivc animated:YES];
                [ivc release];              
            
                break;              
            case 2: 
                ImageViewController *ivc = [[ImageViewController alloc] initWithNibName:@"ImageView" bundle:[NSBundle mainBundle]];
                ivc.ImageName = @"Magnets_Theory_Aubrey.jpg";
                [self.navigationController pushViewController:ivc animated:YES];
                [ivc release];
            
                break;
            case 3: 
                ImageViewController *ivc = [[ImageViewController alloc] initWithNibName:@"ImageView" bundle:[NSBundle mainBundle]];
                ivc.ImageName = @"Magnets_AU_Aubrey.jpg";
                [self.navigationController pushViewController:ivc animated:YES];
                [ivc release];
            
                break;
            default: 
                DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:[NSBundle mainBundle]];
                [self.navigationController pushViewController:dvController animated:YES];
                [dvController release];
                
                break;
        
    
    else 

        //Prepare to tableview.
        RootViewController *rvController = [[RootViewController alloc] initWithNibName:@"RootViewController" bundle:[NSBundle mainBundle]];

        //Increment the Current View
        rvController.CurrentLevel += 1;

        //Set the title;
        rvController.CurrentTitle = [dictionary objectForKey:@"Title"];

        //Push the new table view on the stack
        [self.navigationController pushViewController:rvController animated:YES];

        rvController.tableDataSource = Children;

        [rvController release];
    


- (void)dealloc 
    [tbController release];
    [CurrentTitle release];
    [tableDataSource release];
    [super dealloc];


@end

【参考方案1】：

如果您想在单元格中指明披露，您可以使用属性accessoryType。

cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;

可以有这些

typedef enum 
    UITableViewCellAccessoryNone,                   // don't show any accessory view
    UITableViewCellAccessoryDisclosureIndicator,    // regular chevron. doesn't track
    UITableViewCellAccessoryDetailDisclosureButton, // blue button w/ chevron. tracks
    UITableViewCellAccessoryCheckmark               // checkmark. doesn't track
 UITableViewCellAccessoryType;

【讨论】：

感谢 7KV7。通过将蓝色按钮添加到 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath ，我得到了雪佛龙的蓝色按钮，但它也显示在第一级。我如何才能更改或删除上面的代码？

如果你不想显示这个 cell.accessoryType = UITableViewCellAccessoryNone;

嗯，这是我的问题的一半。所以我使用data.plist 生成一个表。基本上是三层。在第一层，它进入三个第二层。第一层不需要披露按钮。只有第二层可以。

是的，您可以根据您的等级提供上述代码。根据层，指定accessoryType

我仍然对在哪里添加它感到困惑，因为所有级别都有按钮。我只想要第二级。