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标题: 自定义键盘的代码片段，非常实用 [打印本页]

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作者: vitanie    时间: 2015-3-2 19:10
标题: 自定义键盘的代码片段，非常实用

@implementation UIKeyboardViewController

@synthesize boardDelegate = _boardDelegate;

- (void)dealloc
{
    _boardDelegate = nil;
        [self removeKeyBoardNotification];
        [super dealloc];
}

// 监听键盘隐藏和显示事件
- (void)addKeyBoardNotification
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowOrHide:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowOrHide:) name:UIKeyboardWillHideNotification object:nil];
}

// 注销监听事件
- (void)removeKeyBoardNotification {
        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

// 计算当前键盘的高度
-(void)keyboardWillShowOrHide:(NSNotification *)notification
{
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
    {
#endif
                kboardHeight = 264.0f + keyBoardToolbarHeight;
        }
        NSValue *keyboardBoundsValue;
        if (IOS_VERSION >= 3.2) {
                keyboardBoundsValue = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
        }
        else {
                keyboardBoundsValue = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
        }
        [keyboardBoundsValue getValue:&keyboardBounds];
        BOOL isShow = [[notification name] isEqualToString:UIKeyboardWillShowNotification] ? YES : NO;
        if ([self firstResponder:objectView])
    {
                [self animateView:isShow textField:[self firstResponder:objectView]
                heightforkeyboard:keyboardBounds.size.height];
        }
}

//输入框上移防止键盘遮挡
- (void)animateView:(BOOL)isShow textField:(id)textField heightforkeyboard:(CGFloat)kheight
{
        kboardHeight = kheight;
        [self checkBarButton:textField];
        CGRect rect = objectView.frame;
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.3];
        if (isShow) {
                if ([textField isKindOfClass:[UITextField class]]) {
                        UITextField *newText = ((UITextField *)textField);
                        CGPoint textPoint = [newText convertPoint:CGPointMake(0, newText.frame.size.height + spacerY) toView:objectView];
                        if (rect.size.height - textPoint.y < kheight)
                                rect.origin.y = rect.size.height - textPoint.y - kheight + viewFrameY;
                        else rect.origin.y = viewFrameY;
                }
                else {
                        UITextView *newView = ((UITextView *)textField);
                        CGPoint textPoint = [newView convertPoint:CGPointMake(0, newView.frame.size.height + spacerY) toView:objectView];
                        if (rect.size.height - textPoint.y < kheight)
                                rect.origin.y = rect.size.height - textPoint.y - kheight + viewFrameY;
                        else rect.origin.y = viewFrameY;
                }
        }
        else rect.origin.y = viewFrameY;
        objectView.frame = rect;
        [UIView commitAnimations];
}

//输入框获得焦点
- (id)firstResponder:(UIView *)navView {
        for (id aview in [self allSubviews:navView]) {
                if ([aview isKindOfClass:[UITextField class]] && [(UITextField *)aview isFirstResponder]) {
                        return (UITextField *)aview;
                }
                else if ([aview isKindOfClass:[UITextView class]] && [(UITextView *)aview isFirstResponder]) {
                        return (UITextView *)aview;
                }
        }
        return NO;
}

//找出所有的subview
- (NSArray *)allSubviews:(UIView *)theView {
        NSArray *results = [theView subviews];
        for (UIView *eachView in [theView subviews]) {
                NSArray *riz = [self allSubviews:eachView];
                if (riz) {
                        results = [results arrayByAddingObjectsFromArray:riz];
                }
        }
        return results;
}

//输入框失去焦点，隐藏键盘
- (void)resignKeyboard:(UIView *)resignView
{
        [[[UIApplication sharedApplication] keyWindow] endEditing:YES];
}

//设置previousBarItem或nextBarItem是否允许点击
- (void)checkBarButton:(id)textField {
        int i = 0,j = 0;
        UIBarButtonItem *previousBarItem = [keyboardToolbar itemForIndex:0];
    UIBarButtonItem *nextBarItem = [keyboardToolbar itemForIndex:1];
        for (id aview in [self allSubviews:objectView]) {
                if ([aview isKindOfClass:[UITextField class]] && ((UITextField*)aview).userInteractionEnabled && ((UITextField*)aview).enabled) {
                        i++;
                        if ([(UITextField *)aview isEqual:textField]) {
                                j = i;
                        }
                }
                else if ([aview isKindOfClass:[UITextView class]] && ((UITextView*)aview).userInteractionEnabled && ((UITextView*)aview).editable) {
                        i++;
                        if ([(UITextView *)aview isEqual:textField]) {
                                j = i;
                        }
                }
        }
        [previousBarItem setEnabled:j > 1 ? YES : NO];
        [nextBarItem setEnabled:j < i ? YES : NO];
}

//toolbar button点击事件
#pragma mark - UIKeyboardView delegate methods
-(void)toolbarButtonTap:(UIButton *)button
{
        NSInteger buttonTag = button.tag;
        NSMutableArray *textFieldArray=[NSMutableArray arrayWithCapacity:10];
        for (id aview in [self allSubviews:objectView]) {
                if ([aview isKindOfClass:[UITextField class]] && ((UITextField*)aview).userInteractionEnabled && ((UITextField*)aview).enabled) {
                        [textFieldArray addObject:(UITextField *)aview];
                }
                else if ([aview isKindOfClass:[UITextView class]] && ((UITextView*)aview).userInteractionEnabled && ((UITextView*)aview).editable) {
                        [textFieldArray addObject:(UITextView *)aview];
                }
        }
        for (int i = 0; i < [textFieldArray count]; i++) {
                id textField = [textFieldArray objectAtIndex:i];
                if ([textField isKindOfClass:[UITextField class]]) {
                        textField = ((UITextField *)textField);
                }
                else {
                        textField = ((UITextView *)textField);
                }
                if ([textField isFirstResponder]) {
                        if (buttonTag == 1) {
                                if (i > 0) {
                                        [[textFieldArray objectAtIndex:--i] becomeFirstResponder];
                                        [self animateView:YES textField:[textFieldArray objectAtIndex:i] heightforkeyboard:kboardHeight];
                                }
                        }
                        else if (buttonTag == 2) {
                                if (i < [textFieldArray count] - 1) {
                                        [[textFieldArray objectAtIndex:++i] becomeFirstResponder];
                                        [self animateView:YES textField:[textFieldArray objectAtIndex:i] heightforkeyboard:kboardHeight];
                                }
                        }
                }
        }
        if (buttonTag == 3)
                [self resignKeyboard:objectView];
}


#pragma mark - TextField delegate methods
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
        [self checkBarButton:textField];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
        [textField resignFirstResponder];   
        return YES;
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
        if ([self.boardDelegate respondsToSelector:@selector(alttextFieldDidEndEditing:)])
    {
                [self.boardDelegate alttextFieldDidEndEditing:textField];
        }
}

#pragma mark - UITextView delegate methods
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
        if ([text isEqualToString:@"\n"])
    {
                [textView resignFirstResponder];   
                return NO;   
        }
    return YES;
}

- (void)textViewDidEndEditing:(UITextView *)textView
{
        if ([self.boardDelegate respondsToSelector:@selector(alttextViewDidEndEditing:)])
    {
                [self.boardDelegate alttextViewDidEndEditing:textView];
        }
}
- (void)textViewDidBeginEditing:(UITextView *)textView
{
    if([self.boardDelegate respondsToSelector:@selector(alttextViewDidBeginEditing:)])
    {
        [self.boardDelegate alttextViewDidBeginEditing:textView];
    }
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if([self.boardDelegate respondsToSelector:@selector(alttextViewEditing:shouldChangeCharactersInRange:replacementString:)])
    {
        return [self.boardDelegate alttextViewEditing:textField shouldChangeCharactersInRange:range replacementString:string];
    }
    return YES;
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    if([self.boardDelegate respondsToSelector:@selector(alttextFieldShouldBeginEditing:)])
    {
        return [self.boardDelegate alttextFieldShouldBeginEditing:textField];
    }
    return YES;
}

@end

@implementation UIKeyboardViewController (UIKeyboardViewControllerCreation)

- (id)initWithControllerDelegate:(id <UIKeyboardViewControllerDelegate>)delegateObject {
        if (self = [super init])
    {
                self.boardDelegate = delegateObject;
        if ([self.boardDelegate isKindOfClass:[UIViewController class]])
        {
                        objectView = [(UIViewController *)[self boardDelegate] view];
                }
                else if ([self.boardDelegate isKindOfClass:[UIView class]])
        {
                        objectView = (UIView *)[self boardDelegate];
                }
        viewFrameY = objectView.frame.origin.y;
                [self addKeyBoardNotification];
        }
        return self;
}

@end

@implementation UIKeyboardViewController (UIKeyboardViewControllerAction)

//给键盘加上toolbar
- (void)addToolbarToKeyboard
{
        keyboardToolbar = [[UIKeyboardView alloc] initWithFrame:CGRectMake(0, 0, objectView.frame.size.width, keyBoardToolbarHeight)];
        keyboardToolbar.delegate = self;
        for (id aview in [self allSubviews:objectView])
    {
                if ([aview isKindOfClass:[UITextField class]])
        {
                        ((UITextField *)aview).inputAccessoryView = keyboardToolbar;
                        ((UITextField *)aview).delegate = self;
                }
                else if ([aview isKindOfClass:[UITextView class]])
        {
                        ((UITextView *)aview).inputAccessoryView = keyboardToolbar;
                        ((UITextView *)aview).delegate = self;
                }
        }
        [keyboardToolbar release];
}

@end
[/code]

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