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
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。
其他回答
所有这些关于找到键盘视图并在第三行添加done按钮的实现(这就是为什么按钮。y = 163 b/c键盘的高度是216)是脆弱的,因为iOS不断改变视图层次结构。例如,上述代码都不适用于iOS9。
我认为更安全的方法是找到最顶层的视图,通过[[UIApplication sharedApplication] windows] lastObject],并在它的左下角添加按钮,doneButton.frame = CGRectMake(0, screen_height - 53,106,53);//人像模式
let pickerView = UIPickerView()
var yearpickerToolbar: UIToolbar?
func createPickerView() {
pickerView.delegate = self
textfield.inputView = pickerView }
func dismissPickerView() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
toolBar.isUserInteractionEnabled = true
textfield.inputAccessoryView = toolBar
textfield.delegate = self
yearpickerToolbar = UIToolbar()
yearpickerToolbar?.autoresizingMask = .flexibleHeight
//add buttons
let cancelButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action:#selector(cancelBtnClicked(_:)))
cancelButton.tintColor = UIColor.blue
let flexSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let doneButton = UIBarButtonItem(title: "Done", style: .plain , target: self, action: #selector(self.doneBtnClicked(_ :) ))
doneButton.tintColor = UIColor.blue
doneButton.setTitleTextAttributes([NSAttributedString.Key.foregroundColor:
UIColor.black], for: .normal)
cancelButton.setTitleTextAttributes([NSAttributedString.Key.foregroundColor:
UIColor.black], for: .normal)
yearpickerToolbar?.items = [cancelButton, flexSpace, doneButton]
textfield.inputAccessoryView = yearpickerToolbar }
@objc func cancelBtnClicked(_ button: UIBarButtonItem?) {
self.view.endEditing(true)
}
@objc func doneBtnClicked(_ button: UIBarButtonItem?) {
self.view.endEditing(true)
}
如果你有多个数字字段,我建议子类化UITextField来创建一个NumericTextField,它总是显示一个带有done按钮的数字键盘。然后,简单地将你的数值字段与接口构建器中的这个类关联起来,你就不需要在任何视图控制器中添加任何额外的代码。下面是我在Xcode 8.0中使用的Swift 3.0类。
class NumericTextField: UITextField {
let numericKbdToolbar = UIToolbar()
// MARK: Initilization
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.initialize()
}
override init(frame: CGRect) {
super.init(frame: frame)
self.initialize()
}
// Sets up the input accessory view with a Done button that closes the keyboard
func initialize()
{
self.keyboardType = UIKeyboardType.numberPad
numericKbdToolbar.barStyle = UIBarStyle.default
let space = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let callback = #selector(NumericTextField.finishedEditing)
let donebutton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.done, target: self, action: callback)
numericKbdToolbar.setItems([space, donebutton], animated: false)
numericKbdToolbar.sizeToFit()
self.inputAccessoryView = numericKbdToolbar
}
// MARK: On Finished Editing Function
func finishedEditing()
{
self.resignFirstResponder()
}
}
斯威夫特4.2
class NumericTextField: UITextField {
let numericKbdToolbar = UIToolbar()
// MARK: Initilization
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.initialize()
}
override init(frame: CGRect) {
super.init(frame: frame)
self.initialize()
}
// Sets up the input accessory view with a Done button that closes the keyboard
func initialize()
{
self.keyboardType = UIKeyboardType.numberPad
numericKbdToolbar.barStyle = UIBarStyle.default
let space = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
let callback = #selector(NumericTextField.finishedEditing)
let donebutton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.done, target: self, action: callback)
numericKbdToolbar.setItems([space, donebutton], animated: false)
numericKbdToolbar.sizeToFit()
self.inputAccessoryView = numericKbdToolbar
}
// MARK: On Finished Editing Function
@objc func finishedEditing()
{
self.resignFirstResponder()
}
}
一个更简单的解决方案
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
[textViewInstance1 resignFirstResponder];
[textViewInstance2 resignFirstResponder];
[textField resignFirstResponder];
}
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。: -)