我想給iPhone數字鍵盤添加一個完成按鈕。就在這樣一個按鈕的左下方還有一個方便的空間。如何在iPhone OS 4的數字鍵盤上顯示按鈕'完成'？
以前，我是用相似的技巧那些Question 584538和Luzian Scherrer's excellent blog post描述，而是停在的iOS 4的工作，我可以通過創建自定義inputView做到這一點，但我更願意去繼承寫作的蘋果鍵盤我自己的。
有沒有新的方式添加視圖到標準鍵盤？有人爲此發佈了OSS inputView嗎？有另一種方法嗎？
Luzian Scherrer's blog post中描述的技術可以在iOS 4.0中使用。
我的代碼將按鈕添加到鍵盤失敗，因爲它是從textFieldDidBeginEditing:委託方法中調用的，該方法在創建鍵盤窗口的子視圖之前調用該方法（在4.0中）。當我觀察到UIKeyboardWillShowNotification時，我通過調用我的代碼解決了問題，這種情況發生得很晚。
我得到了這個工作。看到這裏的代碼：http://gist.github.com/454844
有兩個問題：
UIKeyboardWillShowNotification鍵盤視圖是否存在之前被髮送，但您安排您的代碼在下次運行環通運行，他們確實存在。所以你不必打擾DidShow這是不太令人滿意的。
在iOS 4上，UIKeyboard視圖位於視圖層次結構中的其他位置。
我已經提交給蘋果作爲一個錯誤。 Interface Builder允許開發人員爲鍵盤類型的數字鍵盤指定返回鍵類型。錯誤號8759674.
蘋果跟進說，這個問題以前已經記錄爲錯誤ID＃5885964和他們關閉8759674.
你可以使用這個鍵盤製作上的數字完成按鈕通知碼keypad.You必須在您的最後下載done.png圖片。
在.h文件中
{ //Keyboard Hide
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;
在.m文件
@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:@"NumberDone.png"];
self.numberPadDoneImageHighlighted = [UIImage imageNamed:@"NumberDone.png"];
} else {
self.numberPadDoneImageNormal = [UIImage imageNamed:@"NumberDone.png"];
self.numberPadDoneImageHighlighted = [UIImage imageNamed:@"NumberDone.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 setTitle:@"Return" forState:UIControlStateNormal];
[self.numberPadDoneButton setFont:[UIFont boldSystemFontOfSize:18]];
[self.numberPadDoneButton setTitleColor:[UIColor colorWithRed:77.0f/255.0f green:84.0f/255.0f blue:98.0f/255.0f alpha:1.0] forState:UIControlStateNormal];
[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];
}
我重構代碼，並把它放在github上。
我創建了一個版本，以使數字鍵盤的橫版... 插頭插入Luzian謝樂的博客中描述的技術，並新增兩個額外的PNG圖像（這裏不包括），以及「isLandscape」布爾成「didRotateFromInterfaceOrientation」方法..
@interface AlarmController()
{
CGRect doneButtnRectVert;
CGRect doneButtnRectHorz;
CGRect doneButtnRect;
UIImage* DoneUpVert;
UIImage* DoneDownVert;
UIImage* DoneUpHorz;
UIImage* DoneDownHorz;
UIImage* DoneUp;
UIImage* DoneDown;
UIButton *oldDoneButton;
}
@end
//---------------------------------------------------------------------------
- (void)viewDidUnload
{
NSLog(@"viewDidUnload AlarmController");
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidShowNotification object:nil];
[super viewDidUnload];
}
//---------------------------------------------------------------------------
- (void)addButtonToKeyboard
{
NSLog(@"addButtonToKeyboard AlarmController");
if (isLandscape)
{
doneButtnRect = doneButtnRectHorz;
DoneUp = DoneUpHorz;
DoneDown = DoneDownHorz;
} else {
doneButtnRect = doneButtnRectVert;
DoneUp = DoneUpVert;
DoneDown = DoneDownVert;
}
UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
doneButton.frame = doneButtnRect;
doneButton.adjustsImageWhenHighlighted = NO;
[doneButton setImage:DoneUp forState:UIControlStateNormal];
[doneButton setImage:DoneDown forState:UIControlStateHighlighted];
[doneButton addTarget:self action:@selector(done:) forControlEvents:UIControlEventTouchUpInside];
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
UIView* keyboard;
for(int i=0; i<[tempWindow.subviews count]; i++)
{
keyboard = [tempWindow.subviews objectAtIndex:i];
if([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
{
if (oldDoneButton) [oldDoneButton removeFromSuperview];
[keyboard addSubview:doneButton];
}
}
oldDoneButton = doneButton;
}
//---------------------------------------------------------------------------
- (void)keyboardDidShow:(NSNotification *)note
{
NSLog(@"keyboardDidShow AlarmController");
[self addButtonToKeyboard];
}
#pragma mark -
#pragma mark meaty area...
//---------------------------------------------------------------------------
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"textFieldDidEndEditing AlarmController");
oldDoneButton = nil;
}
//---------------------------------------------------------------------------
- (void)viewDidLoad
{
NSLog(@"viewDidLoad AlarmController");
[super viewDidLoad];
doneButtnRectVert = CGRectMake(0, 163, 106, 53);
doneButtnRectHorz = CGRectMake(0, 122, 159, 40);
DoneUpVert = [UIImage imageNamed:@"DoneUp3.png"];
DoneDownVert = [UIImage imageNamed:@"DoneDown3.png"];
DoneUpHorz = [UIImage imageNamed:@"DoneUpHor.png"];
DoneDownHorz = [UIImage imageNamed:@"DoneDnHor.png"];
doneButtnRect = doneButtnRectVert;
DoneUp = DoneUpVert;
DoneDown = DoneDownVert;
oldDoneButton = nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification object:nil];
}
你可以用「應用」添加inputAccessoryView和「取消」按鈕，並與當時解僱數字鍵盤。
- (void)viewDidLoad
{
[super viewDidLoad];
UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
numberToolbar.items = [NSArray arrayWithObjects:
[[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad)],
[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
[[UIBarButtonItem alloc]initWithTitle:@"Apply" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)],
nil];
numberTextField.inputAccessoryView = numberToolbar;
}
-(void)cancelNumberPad{
[numberTextField resignFirstResponder];
numberTextField.text = @"";
}
-(void)doneWithNumberPad{
NSString *numberFromTheKeyboard = numberTextField.text;
[numberTextField resignFirstResponder];
}
謝謝，它真的幫助 – 2012-07-12 14:01:42
歡迎您:) – Luda 2012-07-23 07:49:05
令人驚歎！謝謝 – 2012-09-10 09:44:37
在4.2，這並不工作。 – WrightsCS 2010-11-09 03:19:48
我與4.2有同樣的問題。爲什麼這麼複雜？！？！蘋果？！？ – AYBABTU 2010-12-09 17:42:31
在我的應用程序中，我有兩個文本字段。一個將顯示數字鍵盤和其他文本字段將顯示正常的字母鍵盤。我只想爲數字鍵盤輸入完成按鈕。我怎樣才能防止它的普通鍵盤？ – Satyam 2012-06-27 18:42:27