Question

我不能为我的生活弄清楚这里有什么问题。我正在完成一个教程。我仔细检查了我的打字。我甚至复制并粘贴了代码，但我仍然收到此错误。

#import "AddToDoItemViewController.h"

@interface AddToDoItemViewController ()

@end

@implementation AddToDoItemViewController

- (IBAction)textField:(id)sender {
}
 - (IBAction)saveButton:(id)sender {
}

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}

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


#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if (sender != self.saveButton) return;
if (self.textField.text.length > 0) {
    self.toDoItem = [[ToDoItem alloc] init];
    self.toDoItem.itemName = self.textField.text;
    self.toDoItem.completed = NO;
}
}


@end

Answer 1

在您发布的代码中，您的班级没有名为saveButton的媒体资源。它有一个名为saveButton:的方法。因此错误消息似乎是正确的。

Answer 2

@interface AddToDoItemViewController ()

@property (strong, nonatomic) IBOutlet UIButton *saveButton;

@end

物业＆＃39; saveButton＆＃39;找不到类型对象＆＃39; AddToDoItemViewController＆＃39;

2 个答案: