Xcode问题无法使代码正常工作

Question

当我尝试执行此XCODE时发生错误。有人能帮我理解吗？错误在第5行。

   #import <UIKit/UIKit.h>

   @interface BIDViewController : UIViewController
   @property (weak, nonatomic) IBOutlet UITextField *numberField;
   @property (weak, nonatomic) IBOutlet UITextField *nameField;
   - (IBAction)textFieldDoneEditing:(id)sender;
   [sender resignFirstResponder];
   @end

感谢。

Answer 1

[sender resignFirstResponder];

您无法在.h文件中执行此操作。去掉它。这属于.m。

Answer 2

in .h

#import <UIKit/UIKit.h>

@interface BIDViewController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *numberField;
@property (weak, nonatomic) IBOutlet UITextField *nameField;
- (IBAction)textFieldDoneEditing:(id)sender;

in .m

- (IBAction)textFieldDoneEditing:(id)sender
{
    [sender resignFirstResponder];
}