Question

我有一个plist（字典数组），它填充表视图并正常工作。我使用Xcode 4和故事板。

现在我已经从常规UIViewController创建了一个详细视图，当然我希望所选名称在详细视图中的nameLabel中显示。但我无法建立正确的联系。到目前为止，这是我的代码：

WineObject.m：

#import "WineObject.h"

@implementation WineObject 
@synthesize libraryContent, libraryPlist;

- (id)initWithLibraryName:(NSString *)libraryName {
    if (self = [super init]) {
        libraryPlist = libraryName;
        libraryContent = [[NSArray alloc] initWithContentsOfFile:[[NSBundle mainBundle] 
                                                              pathForResource:libraryPlist ofType:@"plist"]];
}
return self;
}


- (NSDictionary *)libraryItemAtIndex:(int)index {
return (libraryContent != nil && [libraryContent count] > 0 && index < [libraryContent count]) 
? [libraryContent objectAtIndex:index]
: nil;
}

- (int)libraryCount {
    return (libraryContent != nil) ? [libraryContent count] : 0;
}

- (void) dealloc {
    if (libraryContent) [libraryContent release];
    [super dealloc];
}

@end

ViewController.h：

#import <UIKit/UIKit.h>
@class WineObject;

@interface WinesViewController : UITableViewController {
WineObject *wine;
}


@end

ViewController.m：

#import "WinesViewController.h"
#import "WineObject.h"
#import "WineCell.h"

@interface WinesViewController ()

@end

@implementation WinesViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

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

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

#pragma mark - Table view data source

- (void)viewWillAppear:(BOOL)animated {
    wine = [[WineObject alloc] initWithLibraryName:@"Wine"];
    self.title = @"Vinene";
    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [wine libraryCount];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"wineCell";

    WineCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Configure the cell...

    cell.nameLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Name"];
    cell.districtLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"District"];
    cell.countryLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Country"];
    cell.bottleImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Image"]];
    cell.flagImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Flag"]];
    cell.fyldeImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Fylde"]];
    cell.friskhetImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Friskhet"]];
    cell.garvesyreImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Garvesyre"]];

    return cell;
}

#pragma mark - Table view delegate

@end

WineCell.h：

#import <UIKit/UIKit.h>

@interface WineCell : UITableViewCell

@property (nonatomic, strong) IBOutlet UILabel *nameLabel;
@property (nonatomic, strong) IBOutlet UILabel *districtLabel;
@property (nonatomic, strong) IBOutlet UILabel *countryLabel;
@property (nonatomic, strong) IBOutlet UIImageView *bottleImageView;
@property (nonatomic, strong) IBOutlet UIImageView *flagImageView;
@property (nonatomic, strong) IBOutlet UIImageView *fyldeImageView;
@property (nonatomic, strong) IBOutlet UIImageView *friskhetImageView;
@property (nonatomic, strong) IBOutlet UIImageView *garvesyreImageView;

@end

Answer 1

您是使用XIB进行界面还是以编程方式生成界面？

如果您使用的是XIB，则问题是您没有加载它：

更改

winesDetailViewController = [[WinesDetailViewController alloc] init];

要

winesDetailViewController = [[WinesDetailViewController alloc] initWithNibName:@"YourNibNameHere" bundle:nil];

或者，如果以编程方式生成它，则必须先设置nameLabel，否则它将为nil。 @synthesize不设置变量，它只是生成getter和setter，以便您可以从外部设置它。

在viewDidAppear:内（或更好地在init内）添加：

self.nameLabel=[[UILabel alloc] initWithFrame:CGRectMake(100,100,100,100)];

编辑：如果您使用的是Storyboard，则表明您必须执行以下操作。

故事板是关于人际关系的。在故事板编辑器中，您可以添加按钮并告诉他们连接到哪个视图控制器。同样的想法适用于TableView Cells。您可以添加原型表视图单元格（并对其进行自定义）并为其指定关系。您希望提供的关系是您的详细信息视图。

1。）子类UITableViewCell并为其提供一个属性，该属性是您尝试发送到详细视图的字典

2.。）创建单元格（cellForRowAtIndexPath:）时，您需要确保将自定义单元格出列并将字典分配给您提供的属性。

3.确保您的详细信息视图具有标识符：DetailView

4.。）在表视图控制器中，添加以下代码：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
   if([segue.identifier isEqualToString:@"DetailView"])
   {
      //This works because by the time prepareForSeque: is called, the navigationController has loaded the new view
      ((DetailView *)[[self.navigationController viewControllers] objectAtIndex:0]).dataProperty=((MyCustomTableViewCell *)sender).dataProperty;
   }
}

应该这样做！

将数据从plist传递到详细视图

1 个答案: