Ios 当我点击返回键（xcode）时，键盘未重新调整

我正试图让键盘离开，当我按下应用程序上的返回键时，下面是我的.m代码：

- (BOOL)textFieldShouldReturn:(UITextField *)textField{

[textField resignFirstResponder];
return YES;

}

以及.h中的代码：

- (BOOL)textFieldShouldReturn:(UITextField* )textField;

但是当我运行应用程序并按下返回键时，什么也没有发生。我做错了什么

my.h:

#import <UIKit/UIKit.h> 
@interface ChemicalInfoViewController: UIViewController{
IBOutlet UIScrollView *ChemicalInforScroller;

}
@property (strong, nonatomic) IBOutlet UITextField *PPMForChlTextField;
@property (strong, nonatomic) IBOutlet UITextField *GallonsForChlTextField;
@property (strong, nonatomic) IBOutlet UITextField *PPMForAlkTextField;
@property (strong, nonatomic) IBOutlet UITextField *GallonsForAlkTextField;
@property (strong, nonatomic) IBOutlet UITextField *PPMForPHTextField;
@property (strong, nonatomic) IBOutlet UITextField *GallonsForPHTextField;
- (IBAction)SumbitCDI:(UIButton *)sender;
@property (strong, nonatomic) IBOutlet UILabel *PPMLabelForChl;
@property (strong, nonatomic) IBOutlet UILabel *GallonsLabelForChl;
@property (strong, nonatomic) IBOutlet UILabel *PPMLabelForAlk;
@property (strong, nonatomic) IBOutlet UILabel *GallonsLabelForAlk;
@property (strong, nonatomic) IBOutlet UILabel *PPMLabelForPH;
@property (strong, nonatomic) IBOutlet UILabel *GallonsLabelForPH;
@property (strong, nonatomic) IBOutlet UITextField *ChlorinePoundsTextField;
@property (strong, nonatomic) IBOutlet UITextField *GallonsForAlkDecreaser;
@property (strong, nonatomic) IBOutlet UITextField *PhPoundsTextField;
@property (strong, nonatomic) IBOutlet UITextField *AlkPoundsTextField;
@property (strong, nonatomic) IBOutlet UITextField *LbsForAlkDecreaser;
@property (strong, nonatomic) IBOutlet UITextField *PPMForAlkDecreaser;
@property (strong, nonatomic) IBOutlet UITextField *LbsForPhDecreaser;
@property (strong, nonatomic) IBOutlet UITextField *PPMForPhDecreaser;
@property (strong, nonatomic) IBOutlet UITextField *GallonsForPhDecreaser;
- (IBAction) clickedBackground;
@interface ChemicalInfoViewController : UIView <UITextField>
@end

---

在

.h

中，删除：

- (BOOL)textFieldShouldReturn:(UITextField* )textField;

考虑到在您的

.h

中，您遵守以下协议，它将正常工作：

@interface yourViewController : UIView <UITextFieldDelegate>

关于

@end

的编辑：

在

.m

中，在底部添加一个

@end

；因此，它变成（滚动到最底部）：

---

您没有为文本字段设置代理

在“viewDidLoad”中添加

_chloreneboundstextfield.delegate=self

_GallonsForAlkDecreaser.delegate=self

_PhPoundsTextField.delegate=self

_AlkPoundsTextField.delegate=self

_LbsForAlkDecreaser.delegate=self

_PPMForAlkDecreaser.delegate=self

_LbsForPhDecreaser.delegate=self

_PPMForPhDecreaser.delegate=self

_GallonsForPhDecreaser.delegate=self

---

由于某种原因，这些方法似乎都不起作用，但我最终做的是创建一个didenonexit操作，并在该操作下为每个文本字段退出键盘

这样仍然不起作用。谢谢你，还有其他想法吗？@Jake我刚刚测试过它。这对我有用。yourTextField是您的文本字段；如果您有一个名为“textField”的textField，则将其替换为它。@Jake从.h中删除该方法；按照回答中提到的协议，那么这个方法应该被调用，键盘应该被放弃。@Jake它在哪里说的？小时还是分钟？请出示您的.h文件。通常在缺少

}

时会发生这种情况。@Jake Here:

@interface-ChemicalInfoViewController:UIView

应该是

@interface-ChemicalInfoViewController:UIView

并且在.m中缺少

@end

@interface yourViewController : UIView <UITextFieldDelegate>

yourTextField.delegate = self;

@implementation ChemicalInfoViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {

}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
[ChemicalInforScroller setScrollEnabled:YES];
[ChemicalInforScroller setContentSize:CGSizeMake(320, 1000)];
self.textField.delegate = self;

}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];

}


- (IBAction) clickedBackground {

[self.view endEditing:YES];

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{

[textField resignFirstResponder];
return YES;

}

@end //Here :-)