iphone - iPhone 应用程序无法编译

Question

第 6 行和第 7 行编译时出错。它显示“预期标识符或 (”。有人可以帮我解决这个问题吗？

#import <UIKit/UIKit.h>

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

Answer 1

您的电话resignFirstResponder不属于@interface. 应该从您的相关方法调用它们@implementation（例如，从、从屏幕上的textFieldShouldReturnaUITapGestureRecognizer或其他地方，或任何地方）。touchesBegan

Answer 2

BIDViewController.h：

#import <UIKit/UIKit.h>

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

BIDViewController.m:

#include "BIDViewController.h";

@implementation BIDViewController

- (IBAction)textFieldDoneEditing:(id)sender
{
    [self.nameField resignFirstResponder];
    [self.numberField resignFirstResponder];
}

@end

Answer 3

您不能在头文件中触发方法。它们需要在您的实现文件中的方法内。Header(.h) 文件用于向编译器等声明内容，而实现文件(.m) 是魔法应该发生的地方。

做这样的事情

你的头文件..

#import <UIKit/UIKit.h>

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

@end

还有你的实现文件（.m）

#import "BIDViewController.h"

@implementation BIDViewController

- (IBAction)someMethodOrAction:(id)sender {

[self.nameField resignFirstResponder];
[self.numberField resignFirstResponder];
}

@end