在. numberpad键盘类型上没有“完成”按钮。当用户在文本字段中输入数字信息时,如何使数字pad消失?
我可以使用默认键盘来获得“完成”按钮,但用户必须切换到数字键才能输入数字。有没有办法在数字板上显示“完成”按钮?
在. numberpad键盘类型上没有“完成”按钮。当用户在文本字段中输入数字信息时,如何使数字pad消失?
我可以使用默认键盘来获得“完成”按钮,但用户必须切换到数字键才能输入数字。有没有办法在数字板上显示“完成”按钮?
当前回答
以下是对Luda的回答的全面检查,并进行了以下更改:
附件视图会自动调整到应用程序框架的宽度 避免使用已弃用的常量UIBarButtonItemStyleBordered Done按钮被实例化为UIBarButtonSystemItemDone
目前“Done”按钮位于附件视图的中央。您可以通过删除相关一侧的空格将其定位在左侧或右侧。
我省略了“取消”按钮,因为默认键盘也没有这个按钮。如果你确实想要一个“取消”按钮,我建议你实例化它为一个UIBarButtonSystemItemCancel,并确保你没有丢弃文本字段中的原始值。在Luda的回答中实现的“取消”行为会用空字符串覆盖值,这可能不是你想要的。
- (void)viewDidLoad {
[super viewDidLoad];
float appWidth = CGRectGetWidth([UIScreen mainScreen].applicationFrame);
UIToolbar *accessoryView = [[UIToolbar alloc]
initWithFrame:CGRectMake(0, 0, appWidth, 0.1 * appWidth)];
UIBarButtonItem *space = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
UIBarButtonItem *done = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:@selector(selectDoneButton)];
accessoryView.items = @[space, done, space];
self.valueField.inputAccessoryView = accessoryView;
}
- (void)selectDoneButton {
[self.valueField resignFirstResponder];
}
有关构建附件视图的更多信息,请参阅Apple关于数据输入自定义视图的文档。你可能会想要参考UIToolbar和UIBarButtonItem的参考页面。
其他回答
SWIFT 3.0不同的风格,使用了以前一些答案的部分内容。
func addToolbarToNumberPad()
{
let numberPadToolbar: UIToolbar = UIToolbar()
numberPadToolbar.isTranslucent = true
numberPadToolbar.items=[
UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(self.cancelAction)),
UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: nil),
UIBarButtonItem(title: "Custom", style: .done, target: self, action: #selector(self.customAction)),
UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(self.doneAction)),
]
numberPadToolbar.sizeToFit()
textField.inputAccessoryView = numberPadToolbar
}
func cancelAction()
{
textField.resignFirstResponder()
}
func customAction()
{
textField.resignFirstResponder()
}
func doneAction()
{
textField.resignFirstResponder()
}
override func viewDidLoad()
{
super.viewDidLoad()
self.addToolbarToNumberPad()
}
这是我遇到的最简单的解决办法。我是从《iOS 5开发入门》这本书中学到的。
假设数字字段名为numberField。
In ViewController, add the following method: -(IBAction)closeKeyboard:(id)sender; In ViewController.m, add the following code: -(IBAction)closeKeyboard:(id)sender { [numberField resignFirstResponder]; } Go back to nib file. Open Utilities pan. Open the Identity inspector under Utilities pan. Click on the View (in nib file) once. Make sure you have not clicked on any of the items in the view. For the sake of clarification, you should see UIView under Class in Identity inspector. Change the class from UIView to UIControl. Open Connection Inspector. Click and drag Touch Down and drop the arrow on File Owner icon. (FYI... File Owner icon is displayed on the left of View and appears as a hollow cube with yellow frame.) Select the method: closeKeyboard. Run the program.
现在,当你点击视图背景的任何地方,你应该能够解散键盘。
希望这能帮助你解决问题。: -)
在UIKeyboardTypeNumberPad和缺少返回键的解决方案很好,但只有当屏幕上没有其他非数字pad文本字段时。
我把这段代码变成一个UIViewController你可以简单地子类化它来让数字垫工作。您需要从上面的链接获取图标。
NumberPadViewController.h:
#import <UIKit/UIKit.h>
@interface NumberPadViewController : UIViewController {
UIImage *numberPadDoneImageNormal;
UIImage *numberPadDoneImageHighlighted;
UIButton *numberPadDoneButton;
}
@property (nonatomic, retain) UIImage *numberPadDoneImageNormal;
@property (nonatomic, retain) UIImage *numberPadDoneImageHighlighted;
@property (nonatomic, retain) UIButton *numberPadDoneButton;
- (IBAction)numberPadDoneButton:(id)sender;
@end
和NumberPadViewController.m:
#import "NumberPadViewController.h"
@implementation NumberPadViewController
@synthesize numberPadDoneImageNormal;
@synthesize numberPadDoneImageHighlighted;
@synthesize numberPadDoneButton;
- (id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle {
if ([super initWithNibName:nibName bundle:nibBundle] == nil)
return nil;
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.0) {
self.numberPadDoneImageNormal = [UIImage imageNamed:@"DoneUp3.png"];
self.numberPadDoneImageHighlighted = [UIImage imageNamed:@"DoneDown3.png"];
} else {
self.numberPadDoneImageNormal = [UIImage imageNamed:@"DoneUp.png"];
self.numberPadDoneImageHighlighted = [UIImage imageNamed:@"DoneDown.png"];
}
return self;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
// Add listener for keyboard display events
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:nil];
} else {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
}
// Add listener for all text fields starting to be edited
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(textFieldDidBeginEditing:)
name:UITextFieldTextDidBeginEditingNotification
object:nil];
}
- (void)viewWillDisappear:(BOOL)animated {
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2) {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidShowNotification
object:nil];
} else {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
}
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UITextFieldTextDidBeginEditingNotification
object:nil];
[super viewWillDisappear:animated];
}
- (UIView *)findFirstResponderUnder:(UIView *)root {
if (root.isFirstResponder)
return root;
for (UIView *subView in root.subviews) {
UIView *firstResponder = [self findFirstResponderUnder:subView];
if (firstResponder != nil)
return firstResponder;
}
return nil;
}
- (UITextField *)findFirstResponderTextField {
UIResponder *firstResponder = [self findFirstResponderUnder:[self.view window]];
if (![firstResponder isKindOfClass:[UITextField class]])
return nil;
return (UITextField *)firstResponder;
}
- (void)updateKeyboardButtonFor:(UITextField *)textField {
// Remove any previous button
[self.numberPadDoneButton removeFromSuperview];
self.numberPadDoneButton = nil;
// Does the text field use a number pad?
if (textField.keyboardType != UIKeyboardTypeNumberPad)
return;
// If there's no keyboard yet, don't do anything
if ([[[UIApplication sharedApplication] windows] count] < 2)
return;
UIWindow *keyboardWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
// Create new custom button
self.numberPadDoneButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.numberPadDoneButton.frame = CGRectMake(0, 163, 106, 53);
self.numberPadDoneButton.adjustsImageWhenHighlighted = FALSE;
[self.numberPadDoneButton setImage:self.numberPadDoneImageNormal forState:UIControlStateNormal];
[self.numberPadDoneButton setImage:self.numberPadDoneImageHighlighted forState:UIControlStateHighlighted];
[self.numberPadDoneButton addTarget:self action:@selector(numberPadDoneButton:) forControlEvents:UIControlEventTouchUpInside];
// Locate keyboard view and add button
NSString *keyboardPrefix = [[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2 ? @"<UIPeripheralHost" : @"<UIKeyboard";
for (UIView *subView in keyboardWindow.subviews) {
if ([[subView description] hasPrefix:keyboardPrefix]) {
[subView addSubview:self.numberPadDoneButton];
[self.numberPadDoneButton addTarget:self action:@selector(numberPadDoneButton:) forControlEvents:UIControlEventTouchUpInside];
break;
}
}
}
- (void)textFieldDidBeginEditing:(NSNotification *)note {
[self updateKeyboardButtonFor:[note object]];
}
- (void)keyboardWillShow:(NSNotification *)note {
[self updateKeyboardButtonFor:[self findFirstResponderTextField]];
}
- (void)keyboardDidShow:(NSNotification *)note {
[self updateKeyboardButtonFor:[self findFirstResponderTextField]];
}
- (IBAction)numberPadDoneButton:(id)sender {
UITextField *textField = [self findFirstResponderTextField];
[textField resignFirstResponder];
}
- (void)dealloc {
[numberPadDoneImageNormal release];
[numberPadDoneImageHighlighted release];
[numberPadDoneButton release];
[super dealloc];
}
@end
享受。
我修改了Bryan的解决方案,使其更加健壮,这样它就可以很好地与可能出现在同一视图中的其他类型的键盘一起使用。描述如下:
在iOS numpad UIKeyboard上创建DONE按钮
我会试着在这里解释它,但大部分代码都是要查看的,不容易放在这里
如果你事先知道要输入的数字数量(例如一个4位数的PIN),你可以在按4次键后自动退出,就像我对这个类似问题的回答:
取消数字垫
在这种情况下,不需要额外的done按钮。