我正在关注本教程，这对像我这样的初学者很有帮助。有 2 个屏幕，Players（显示玩家列表）和 PlayerDetails（显示有关玩家的详细信息并允许添加新玩家）
这是代码
#import <UIKit/UIKit.h>
#import "PlayerDetailsViewController.h"
@interface PlayersViewController : UITableViewController<PlayerDetailsViewControllerDelegate>
@property (nonatomic, strong) NSMutableArray *players;
@end
#import "Player.h"
#import "PlayerCell.h"
#import "PlayersViewController.h"
@class PlayerDetailsViewController;
@interface PlayersViewController ()
@end
@implementation PlayersViewController
@synthesize players;
- (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 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.players count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
PlayerCell *cell = (PlayerCell *)[tableView dequeueReusableCellWithIdentifier:@"PlayerCell"];
Player *player = [self.players objectAtIndex:indexPath.row];
cell.nameLabel.text = player.name;
cell.gameLabel.text = player.game;
cell.ratingImageView.image = [self imageForRating:player.rating];
return cell;
}
- (UIImage *)imageForRating:(int)rating
{
switch (rating)
{
case 1: return [UIImage imageNamed:@"1StarSmall.png"];
case 2: return [UIImage imageNamed:@"2StarsSmall.png"];
case 3: return [UIImage imageNamed:@"3StarsSmall.png"];
case 4: return [UIImage imageNamed:@"4StarsSmall.png"];
case 5: return [UIImage imageNamed:@"5StarsSmall.png"];
}
return nil;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[self.players removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:@"AddPlayer"])
{
UINavigationController *navigationController = segue.destinationViewController;
PlayerDetailsViewController *playerDetailsViewController = [[navigationController viewControllers] objectAtIndex:0];
playerDetailsViewController.delegate=self;
}
}
-(void) playerDetailsViewControllerDidCancel:(PlayerDetailsViewController *)controller
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)playerDetailsViewController: PlayerDetailsViewController *)controller didAddPlayer:(Player *)player
{
[self.players addObject:player];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[self.players count] - 1 inSection:0];
[self.tableView insertRowsAtIndexPaths: [NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[self dismissViewControllerAnimated:YES completion:nil];
}
@end
#import <UIKit/UIKit.h>
#import "Player.h"
@class PlayerDetailsViewController;
@protocol PlayerDetailsViewControllerDelegate<NSObject>
-(void)playerDetailsViewControllerDidCancel:(PlayerDetailsViewController*) controller;
-(void)playerDetailsViewController:(PlayerDetailsViewController *)controller didAddPlayer:(Player *)player;
@end
@interface PlayerDetailsViewController : UITableViewController
@property (strong, nonatomic) IBOutlet UITextField *nameTextField;
@property (strong, nonatomic) IBOutlet UILabel *detailLabel;
- (IBAction)cancel:(id)sender;
- (IBAction)done:(id)sender;
@property(weak, nonatomic) id<PlayerDetailsViewControllerDelegate> delegate;
@end
#import "PlayerDetailsViewController.h"
@class Player;
@interface PlayerDetailsViewController ()
@end
@implementation PlayerDetailsViewController
- (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
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexPath.section==0)
{
[self.nameTextField becomeFirstResponder];
}
}
- (IBAction)cancel:(id)sender
{
[self.delegate playerDetailsViewControllerDidCancel:self];
}
- (IBAction)done:(id)sender
{
Player *player = [[Player alloc] init];
player.name = self.nameTextField.text;
player.game = @"Chess";
player.rating = 1;
[self.delegate playerDetailsViewController:self didAddPlayer:player];
}
@end
问题：在 PlayersViewController.m 中，使用以下方法：
-(void)playerDetailsViewController:PlayerDetailsViewController *)controller didAddPlayer:(Player *)player
我收到以下错误消息
- 预期的方法体
- 使用未声明的标识符播放器
我究竟做错了什么？