我试图让键盘消失，当我在我的应用程序上按下返回键时，我的代码来自 .m:
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
和.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，没有任何反应。我做错了什么？
我的.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
还有我的.m:
#import "ChemicalInfoViewController.h"
@interface ChemicalInfoViewController ()
@end
@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;
}
最佳答案
在您的 .h 中，删除:
- (BOOL)textFieldShouldReturn:(UITextField* )textField;
它会正常工作，因为在您的 .h 中，您遵守协议(protocol):
@interface yourViewController : UIView <UITextFieldDelegate>
然后像这样设置委托(delegate):
yourTextField.delegate = self;
关于 @end 的编辑:
在你的.m中，在底部添加一个@end；所以，它变成了(滚动到最底部):
@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 :-)
关于ios - 当我点击返回键时键盘没有退出 (xcode)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27258739/