Question

我有一个如下所示的课程。

#import <Foundation/Foundation.h>

@interface JAMToDoItem : NSObject



@property(nonatomic,strong) NSString *itemName;
@property BOOL * completed;
@property (readonly) NSDate * CreactionDate;
//-(void)MarkAsCompleted:(BOOL)IsComplete onDate:(NSDate*)date;

@end

JAMToDoItem.m文件

    //
//  JAMToDoItem.m
//  ToDoList
//
//  Created by juanabreu on 2/15/14.
//  Copyright (c) 2014 juanabreu. All rights reserved.
//

#import "JAMToDoItem.h"


@interface JAMToDoItem()
//@property NSDate *completionDate;

@end



@implementation JAMToDoItem


@end

然后我尝试访问此类中的属性，如下所示，我得到一个错误

    //
//  JAMToDoList.m
//  ToDoList
//
//  Created by juanabreu on 2/15/14.
//  Copyright (c) 2014 juanabreu. All rights reserved.
//

#import "JAMToDoList.h"
#import "JAMToDoItem.h"



@interface JAMToDoList ()
@property NSMutableArray *toDoItems;

//@property(nonatomic,strong) NSString *itemName;
@end

@implementation JAMToDoList
//@synthesize itemName;

-(IBAction)unwindToRootVC:(UIStoryboardSegue *)segue
{



}



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

- (void)viewDidLoad
{
    [super viewDidLoad];

    //instatiate the array;
    self.toDoItems = [[NSMutableArray alloc]init];
    [self LoadInitialData];

    // 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)LoadInitialData{

    JAMToDoItem *TheItem = [[JAMToDoItem alloc]init];
    TheItem.itemName =@"Buy Milk";

}





- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 0;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
    // Return the number of rows in the section.
    return 0;
}

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

    // Configure the cell...

    return cell;
}

/*
// 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) {
        // Delete the row from the data source
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }   
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}
*/

/*
// 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 - Navigation

// In a story board-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}

 */

@end

注意：LoadInitialData正在另一个类上实现，我试图实现JAMToDoItem属性的实例化。我基本上遵循APPLE所写的教程Here。在我的todolist类的顶部，我确实有#import "JAMToDoItem.h"这是包含我试图设置的属性的类，以及我得到错误的地方。

所以错误我最终

Property 'itemName' not found on object of type 'JAMToDoItem *'

我错过了什么？

Answer 1

UPD：

原因是还有其他JAMToDoItem.h文件带有

//
//  JAMToDoItem.h
//  ToDoList
//
//  Created by juanabreu on 2/15/14.
//  Copyright (c) 2014 juanabreu. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface JAMToDoItem : UIViewController


@end

您可以通过Command +左键单击

找到它

#import "JAMToDoItem.h"

它位于ToDoList/ToDoList/JAMToDoItem.h，您展示的那个位于

ToDoList/JAMToDoItem.h

删除项目中对JAMToDoItem.h和JAMToDoItem.m的引用（选择并点击删除）
删除文件ToDoList/ToDoList/JAMToDoItem.h和ToDoList/ToDoList/JAMToDoItem.m
将文件从ToDoList/JAMToDoItem.h和ToDoList/JAMToDoItem.m移至ToDoList/ToDoList/JAMToDoItem.h和ToDoList/ToDoList/JAMToDoItem.m
选择它们并重新添加到项目中

在对象类型上找不到属性

1 个答案: