为什么我的 plist 不会填充我的 UITableView？

Question

我已经取得了一些进展，并且正在编辑问题以再次成为当前问题。我现在的大问题是分组表视图将加载，但会显示每个部分中的所有内容和每一行。此外，我的 UIAlertView 正在返回对我的 plist (null) 的所有引用。我将如何解决这个问题，因为对 plist 的引用正在杀死我。任何和所有的帮助将不胜感激！

这是我的 plist 文件的纯文本版本：

<array>
<dict>
    <key>eventName</key>
    <string>Comedy Caravan</string>
    <key>eventSpecifics</key>
    <string>Nicholas Anthony</string>
    <key>eventLocation</key>
    <string>The Cats Den</string>
    <key>eventType</key>
    <string>Comedy</string>
    <key>eventGoodies</key>
    <string>Both</string>
    <key>eventDate</key>
    <date>2010-07-23T00:00:00Z</date>
</dict>
<dict>
    <key>eventName</key>
    <string>Comedy Caravan</string>
    <key>eventLocation</key>
    <string>The Cats Den</string>
    <key>eventType</key>
    <string>Comedy</string>
    <key>eventSpecifics</key>
    <string>Bruce Baum</string>
    <key>eventGoodies</key>
    <string>Prizes</string>
    <key>eventDate</key>
    <date>2010-07-24T00:00:00Z</date>
</dict>
<dict>
    <key>eventName</key>
    <string>Late Night Film Series</string>
    <key>eventLocation</key>
    <string>The Cats Den</string>
    <key>eventType</key>
    <string>Comedy</string>
    <key>eventSpecifics</key>
    <string>Avatar</string>
    <key>eventGoodies</key>
    <string>Food</string>
    <key>eventDate</key>
    <date>2010-07-24T02:00:00Z</date>
</dict>
</array>

这是我的 ThisWeekViewController.h：

#import <UIKit/UIKit.h>

@class Event;

@interface ThisWeekViewController : UITableViewController

{
NSArray *eventNames;
Event *event;
}

@property (nonatomic, retain) NSArray *eventNames;
@property (nonatomic, retain) Event *event;

@end

这是我的 ThisWeekViewController.m：

#import "ThisWeekViewController.h"
#import "Event.h"

@implementation ThisWeekViewController

@synthesize eventNames;
@synthesize event;


- (void)viewDidLoad {
    [super  viewDidLoad];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"Events" ofType:@"plist"];
    NSArray *dict = [[NSArray alloc] initWithContentsOfFile:path];

    NSArray *namesArray = [dict valueForKey:@"eventName"];
    self.eventNames = namesArray;
    [dict release];

    [self.tableView reloadData];    
}



- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

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


#pragma mark Table View Methods

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return [self.eventNames count];
}


- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    NSString *key = [NSString stringWithFormat:@"%@", event.eventName];
    return key;
}


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


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

    NSUInteger row = [indexPath row];

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    }

    // Configure the cell.

    // Set the cell's text to the event name
    cell.textLabel.text = event.eventName;

    return cell;
}


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

}


- (void)dealloc {
//  [thisWeek release];
    [event release];
    [eventNames release];
    [super dealloc];
}


@end

我还包含了我的 Event.h 文件

 #import <Foundation/Foundation.h>


@interface Event : NSObject {
    NSString *eventName;
    NSString *eventType;
    NSDate *eventDate;
    NSString *eventLocation;
    NSString *eventGoodies;
    NSString *eventSpecifics;

}

- (id)initWithDictionary:(NSDictionary *)aDictionary;

@property (nonatomic, retain) NSString *eventName;
@property (nonatomic, retain) NSString *eventType;
@property (nonatomic, retain) NSString *eventLocation;
@property (nonatomic, retain) NSDate *eventDate;
@property (nonatomic, retain) NSString *eventGoodies;
@property (nonatomic, retain) NSString *eventSpecifics;

@end

还有我的 Event.m 文件

 #import "Event.h"


@implementation Event

@synthesize eventName;
@synthesize eventType;
@synthesize eventDate;
@synthesize eventLocation;
@synthesize eventGoodies;
@synthesize eventSpecifics;

- (id)initWithDictionary:(NSDictionary *)aDictionary {
    if ([self init]) {
        self.eventName = [aDictionary valueForKey:@"eventName"];
        self.eventType = [aDictionary valueForKey:@"eventType"];
        self.eventDate = [aDictionary valueForKey:@"eventDate"];
        self.eventLocation = [aDictionary valueForKey:@"eventLocation"];
        self.eventGoodies = [aDictionary valueForKey:@"eventGoodies"];
        self.eventSpecifics = [aDictionary valueForKey:@"eventSpecifics"];

    }
    return self;
}

- (void)dealloc {
    [eventName release];
    [eventType release];
    [eventDate release];
    [eventLocation release];
    [eventGoodies release];
    [eventSpecifics release];

    [super dealloc];
}

@end

我希望能够放置诸如 cell.detailTextLabel.text = event.eventSpecifics 之类的东西，然后就不用像这样的引用了。

Answer 1

如果我没记错的话，UITableViewController 会重新加载-viewWillAppear: 中的表格视图。这很可能在调用-viewDidLoad 之前调用。我建议您在 -viewDidLoad 的实现结束时插入对 [self.tableView reloadData] 的调用。

您还应该在-viewDidLoad 的实现顶部调用[super viewDidLoad]，-viewDidUnload 也是如此。

此外，您不需要将您的类声明为符合 UITableViewDataSource 或 UITableViewDelegate，因为您的超类 (UITableViewController) 已经为您做到了。