将IBOutlet连接到UITextField后出错

Question

当我将IBOutlet连接到UITextField时,我遇到了这个奇怪的错误.这真的很奇怪,因为它只发生在这个视图控制器中.我有两个与这个几乎相同的其他视图控制器,它们功能完美.我的故事板中有一个表视图控制器.它有2个分组的部分,每个部分都有静态单元格.每个单元格中都有一个UITextField.现在,如果我只是运行它而没有将textfields连接到我的类,视图加载正常.但是,当我连接它们时,一旦视图加载 - 应用程序崩溃并出现此错误,每个文本字段一个:[UITextField stringByTrimmingCharactersInSet:]:发送到实例的无法识别的选择器

知道这可能是什么原因吗？我很困惑,因为我有其他tableview控制器具有相同的内容,我从来没有得到这个错误.

以下是一些屏幕截图,以帮助进一步解释我的情况:

这是我的.m文件的代码:

    //
//  IdeaViewController.m
//  FinalJSApp
//
//  Created by Jacob Klapper on 10/20/13.
//
//

#import "IdeaViewController.h"

@interface IdeaViewController ()

@end

@implementation IdeaViewController

- (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.
}


/*
// 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

Answer 1

您声明了两个属性,title并且description在视图控制器中分别由和定义.最初定义的这两个属性都是s.UIViewControlllerNSObjectNSString

iOS可能正在尝试访问这些属性,期待NSString并获得其中一个属性UITextField.

尝试重命名这些属性,你的问题应该消失.