Question

我对iPhone编程很新，我正在创建我的第一个应用程序，（世界杯一个）第一个视图是表视图。单元格文本标签用数组填充，所以它显示所有组（组a，B，c等）然后当你选择一个组时，它会拉上另一个UITableViewcontroller，但无论我做什么我都不能设置文本标签细胞（例如法国，墨西哥，南非等）实际上我对cellForRowAtIndexPath所做的一切都有所作为，有人可以告诉我我做错了吗

由于

这是我的视图控制器代码：

GroupADetailViewController.m

#import "GroupADetailViewController.h"

@implementation GroupADetailViewController

@synthesize groupLabel = _groupLabel;
@synthesize groupADetail = _groupADetail;
@synthesize teamsInGroupA;

#pragma mark Memory management
- (void)dealloc {
    [_groupADetail release];
    [_groupLabel release];
    [super dealloc];
}

#pragma mark View lifecycle
- (void)viewDidLoad {
    [super viewDidLoad];

    // Set the number label to show the number data
    teamsInGroupA  = [[NSArray alloc]initWithObjects:@"France",@"Mexico",@"Uruguay",@"South Africa",nil];
    NSLog(@"loaded");
    // Set the title to also show the number data
    [[self navigationItem]setTitle:@"Group A"];

    //[[self navigationItem]cell.textLabel.text:@"test"];

    //[[self navigationItem] setTitle[NSString String
}

- (void)viewDidUnload {
    [self setgroupLabel:nil];
}

#pragma mark Table view methods
- (NSInteger)numberOfSectionsInTableView:(UITableView*)tableView {
    // Return the number of sections in the table view
    return 1;
}

- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in a specific section
    // Since we only have one section, just return the number of rows in the table
    return 4;
    NSLog:("count is %d",[teamsInGroupA count]);
}

- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
    static NSString *cellIdentifier2 = @"Cell2";

    // Reuse an existing cell if one is available for reuse
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier2];

    // If no cell was available, create a new one
    if (cell == nil) {
        NSLog(@"no cell, creating");
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier2] autorelease];
        [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
    }
    NSLog(@"cell already there");

    // Configure the cell to show the data for this row
     //[[cell textLabel]setText:[NSString string

    //[[cell textLabel]setText:[teamsInGroupA objectAtIndex:indexPath.row]];
    //NSUInteger row = [indexPath row];


    //[cell setText:[[teamsInGroupA objectAtIndex:indexPath:row]retain]];
    //cell.textLabel.text:@"Test"   
    [[cell textLabel]setText:[teamsInGroupA objectAtIndex:indexPath.row]];
    return cell;
}


@end

GroupADetailViewController.m

#import "GroupADetailViewController.h"

@implementation GroupADetailViewController

@synthesize groupLabel = _groupLabel;
@synthesize groupADetail = _groupADetail;
@synthesize teamsInGroupA;

#pragma mark Memory management
- (void)dealloc {
    [_groupADetail release];
    [_groupLabel release];
    [super dealloc];
}

#pragma mark View lifecycle
- (void)viewDidLoad {
    [super viewDidLoad];

    // Set the number label to show the number data
    teamsInGroupA  = [[NSArray alloc]initWithObjects:@"France",@"Mexico",@"Uruguay",@"South Africa",nil];
    NSLog(@"loaded");
      // Set the title to also show the number data
    [[self navigationItem]setTitle:@"Group A"];

    //[[self navigationItem]cell.textLabel.text:@"test"];

    //[[self navigationItem] setTitle[NSString String
}

- (void)viewDidUnload {
    [self setgroupLabel:nil];
}

#pragma mark Table view methods
- (NSInteger)numberOfSectionsInTableView:(UITableView*)tableView {
    // Return the number of sections in the table view
    return 1;
}

- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in a specific section
    // Since we only have one section, just return the number of rows in the table
    return 4;
    NSLog:("count is %d",[teamsInGroupA count]);
}

- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
    static NSString *cellIdentifier2 = @"Cell2";

    // Reuse an existing cell if one is available for reuse
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier2];

    // If no cell was available, create a new one
    if (cell == nil) {
        NSLog(@"no cell, creating");
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier2] autorelease];
        [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
    }
    NSLog(@"cell already there");

    // Configure the cell to show the data for this row
    //[[cell textLabel]setText:[NSString string

    //[[cell textLabel]setText:[teamsInGroupA objectAtIndex:indexPath.row]];
    //NSUInteger row = [indexPath row];


    //[cell setText:[[teamsInGroupA objectAtIndex:indexPath:row]retain]];
    //cell.textLabel.text:@"Test"   
    [[cell textLabel]setText:[teamsInGroupA objectAtIndex:indexPath.row]];
    return cell;
}

@end

Answer 1

您是否在第二个UITableView上正确设置了委托？它是从xib加载还是只是硬编码？另外，我没有看到didSelectCellForIndexPath：在任何地方。第二个tableView是否在屏幕上加载？

Answer 2

您的tableViewController必须将delegate属性设置为符合UITableViewDelegate的实例，并将dataSource属性设置为符合UITableViewDataSource协议的对象。当然，这些属性可以设置为self：你可以插入这个

self.dataSource = self;
self.delegate = self;

在viewDidLoad方法中

。

如果不这样做，则永远不会调用您实现的必需方法（在协议中定义），因为默认情况下这两个属性为nil。它能解决你的问题吗？

Answer 3

这个cocoapod https://github.com/xmartlabs/XLData使得UITableView / UICollectionView的加载比直接处理dataSource和delegates更容易。

当我加载了第二个UITableViewController时，无法用数组填充单元格

GroupADetailViewController.m

GroupADetailViewController.m

3 个答案: