ios - iOS从.plist文件加载数据

我是iOS开发的新手。目前，我正在尝试从.plist文件中获取数据并显示在UITableView上。在运行应用程序时，Xcode没有提供任何错误，但是我的应用程序除了显示此内容外，什么都没有显示



这是我的代码

TestAppTableViewController.h

#import <UIKit/UIKit.h>

@interface TestAppTableViewController : UITableViewController

@property (nonatomic,strong) NSArray *content;

@end

TestAppTableViewController.m

#import "TestAppTableViewController.h"

@interface TestAppTableViewController ()

@end

@implementation TestAppTableViewController

@synthesize content = _content;

- (NSArray *) content{
    if (!_content) {
        _content = [[NSArray alloc]initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"]];
    }

    return _content;
}

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

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

- (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.
    return 0;
}

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    // Configure the cell...

    cell.textLabel.text = [[self.content objectAtIndex:indexPath.row]valueForKey:@"city"];
    cell.detailTextLabel.text = [[self.content objectAtIndex:indexPath.row]valueForKey:@"state"];
    return cell;
}

数据表

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<array>
    <dict>
        <key>city</key>
        <string>New York</string>
        <key>state</key>
        <string>NY</string>
        <key>cityText</key>
        <string>This is the description of the city that goes in the tex view just testing.</string>
    </dict>
    <dict>
        <key>city</key>
        <string>Los Angeles</string>
        <key>state</key>
        <string>CA</string>
        <key>cityText</key>
        <string>This the second item&apos;s textview</string>
    </dict>
    <dict>
        <key>city</key>
        <string>Chicago</string>
        <key>state</key>
        <string>IL</string>
        <key>cityText</key>
        <string>here is the text view description for the third item.</string>
    </dict>
    <dict>
        <key>city</key>
        <string>Sandiago</string>
        <key>state</key>
        <string>CA</string>
        <key>cityText</key>
        <string>Here is another city from california</string>
    </dict>
    <dict>
        <key>city</key>
        <string>Talahasy</string>
        <key>state</key>
        <string>FL</string>
        <key>cityText</key>
        <string>Talahasy is the capital of the florida state.</string>
    </dict>
    <dict>
        <key>city</key>
        <string>Boise</string>
        <key>state</key>
        <string>Idaho</string>
        <key>cityText</key>
        <string>boise is the capital of idaho and i have no idea where that is.</string>
    </dict>
</array>
</plist>

我无法找出问题所在。那么，我的问题是代码中的问题是什么？如何显示plist文件中的数据？我浏览了上一个问题的stackoverflow，但这并没有帮助我。

最佳答案

您的表视图至少需要一个部分-

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {

    // Return the number of sections.
    return 1;// make this 1
}

也可以尝试像这样使用objectForKey代替（尽管根据文档说明，如果键不是以@开头，它会自动调用），然后键入强制转换。

cell.textLabel.text = (NSString*)[[self.content objectAtIndex:indexPath.row] objectForKey:@"city"];
cell.detailTextLabel.text = (NSString*)[[self.content objectAtIndex:indexPath.row] objectForKey:@"state"];

如果您仍然一无所获，那么值得检查一下内容实际上是否包含plist数据。在您的-（NSArray *）content方法中，返回之前可能值得记录_content的计数。还要确认self.content = _content

关于ios - iOS从.plist文件加载数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20944276/