Iphone 切换UITextField时是否调整键盘视图？

当键盘出现在我的应用程序中时，我的视图可以向上滑动，这样就可以看到文本字段，并且工作正常。但是，由于其基于键盘通知，因此仅当键盘出现时才起作用

也就是说，我选择一个文本字段，键盘就会出现，视图也会相应地向上滑动，但是如果我直接点击另一个文本字段，视图就不会调整，因为键盘已经存在了

这是我正在使用的代码，如果您能帮助我适应上述情况，我们将不胜感激

-(void)registerForKeyboardNotifications
{
    NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
    [center addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
    [center addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

    // add a tap gesture to drop first responder
    UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapToHideKeyboard:)];
    [self.view addGestureRecognizer:tapGR];
}

-(void)keyboardDidShow:(NSNotification *)notification
{
    CGRect keyboardFrameW = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    UIWindow *window = [[UIApplication sharedApplication] keyWindow];
    CGRect keyboardFrame = [window convertRect:keyboardFrameW toView:self.view];

    //Have a minimum space between the keyboard and textfield
    CGFloat textFieldBuffer = 40;
    CGFloat textFieldKeyboardDifference = 0;

    if (activeTextField.frame.origin.y + activeTextField.frame.size.height > keyboardFrame.origin.y) textFieldKeyboardDifference = (activeTextField.frame.origin.y + activeTextField.frame.size.height + textFieldBuffer) - keyboardFrame.origin.y;
    else if (activeTextField.frame.origin.y + activeTextField.frame.size.height < keyboardFrame.origin.y) textFieldKeyboardDifference = 0;

    [self translateView:self.view toRect:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - textFieldKeyboardDifference, self.view.frame.size.width, self.view.frame.size.height) withDuration:0.3];
}

-(void)keyboardWillHide:(NSNotification *)notification
{
    //Revert to y origin 0
    [self translateView:self.view toRect:CGRectMake(self.view.frame.origin.x, 0, self.view.frame.size.width, self.view.frame.size.height) withDuration:0.3];
}

—（无效）RegisterWorkeryBoardNotifications
{
NSNotificationCenter*中心=[NSNotificationCenter defaultCenter]；
[center addObserver:自选择器：@selector（keyboardDidShow:）名称：UIKeyboardDidShowNotification对象：nil]；
[center addObserver:自选择器：@selector（keyboardWillHide:）名称：UIKeyboardWillHideNotification对象：nil]；
//添加轻触手势以放下第一响应者
UITapGestureRecognizer*tapGR=[[UITapGestureRecognizer alloc]initWithTarget:自操作：@selector（tapToHideKeyboard:）]；
[self.view addgesturecognizer:tapGR]；
}
-（无效）键盘显示：（NSNotification*）通知
{
CGRect keyboardFrameW=[[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue]；
UIWindow*window=[[UIApplication sharedApplication]keyWindow]；
CGRect keyboardFrame=[window convertRect:keyboardFrameW to视图：self.view]；
//在键盘和文本字段之间留有最小的空间
CGFloat TEXTFIELDBUSTER=40；
CGFloat TEXTFIELD键盘差=0；
如果（activeTextField.frame.origin.y+activeTextField.frame.size.height>keyboardFrame.origin.y）textFieldKeyboardDifference=（activeTextField.frame.origin.y+activeTextField.frame.size.height+textFieldBuffer）-keyboardFrame.origin.y；
如果（activeTextField.frame.origin.y+activeTextField.frame.size.height

编辑：

我曾尝试在调用

textfielddibeginediting

时手动调用键盘通知，如下所示：

---

[self keyboardDidShow:[NSNotification notificationWithName:UIKeyboardDidShowNotification对象：nil]]您可能希望在此处为所有
UITextField
提供一个委托，并在委托上实现
-（void）textfieldDiBeginediting:（UITextField*）textField
，以触发滚动操作。每当有人开始编辑文本字段，并且文本字段作为参数传递给该方法时，就会调用该函数

编辑：使用您的代码作为起点，这就是我想到的。每次更改文本字段时都会调用它：

@interface SOViewController () <UITextFieldDelegate>
@property (nonatomic, readwrite, assign) UITextField* activeTextField;
@property (nonatomic, readwrite, assign) CGRect keyboardFrame;
@end

@implementation SOViewController

@synthesize activeTextField;
@synthesize keyboardFrame;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self registerForKeyboardNotifications];
    self.keyboardFrame = CGRectNull;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    self.activeTextField = textField;
    [self updatePosition];
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    self.activeTextField = nil;
}

-(void)registerForKeyboardNotifications
{
    NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
    [center addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
    [center addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

    //    // add a tap gesture to drop first responder
    //    UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapToHideKeyboard:)];
    //    [self.view addGestureRecognizer:tapGR];
}

- (void)translateView: (UIView*)view toRect: (CGRect)rect withDuration: (NSTimeInterval)duration
{
    NSLog(@"Translating view to rect: %@ overDuration: %g", NSStringFromCGRect(rect), duration);
}

- (void)updatePosition
{
    if (self.activeTextField && !CGRectIsNull(self.keyboardFrame))
    {
        UIWindow *window = [[UIApplication sharedApplication] keyWindow];
        CGRect localKeyboardFrame = [window convertRect: self.keyboardFrame toView:self.view];

        //Have a minimum space between the keyboard and textfield
        CGFloat textFieldBuffer = 40;

        CGRect textFieldFrame = self.activeTextField.frame;

        CGRect viewFrame = self.view.frame;
        viewFrame.origin.y = 0;

        if (CGRectGetMaxY(textFieldFrame) + textFieldBuffer > CGRectGetMinY(localKeyboardFrame))
        {
            viewFrame.origin.y = -1.0 * (CGRectGetMaxY(textFieldFrame) + textFieldBuffer - CGRectGetMinY(localKeyboardFrame));
        }

        [self translateView: self.view toRect: viewFrame withDuration: 0.3];

    }
    else
    {
        CGRect viewFrame = self.view.frame;
        viewFrame.origin.y = 0;
        [self translateView: self.view toRect: viewFrame withDuration: 0.3];
    }
}

-(void)keyboardDidShow:(NSNotification *)notification
{
    self.keyboardFrame = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    [self updatePosition];
}

-(void)keyboardWillHide:(NSNotification *)notification
{
    self.keyboardFrame = CGRectNull;
    [self updatePosition];
}

@end

@interface-SOViewController（）
@属性（非原子、读写、赋值）UITextField*activeTextField；
@属性（非原子、读写、赋值）CGRect键盘框；
@结束
@实现SOViewController
@合成活性文本场；
@综合键盘框架；
-（无效）viewDidLoad
{
[超级视图下载]；
//加载视图后，通常从nib执行任何其他设置。
[自注册BoardNotifications]；
self.keyboardFrame=CGRectNull；
}
-（无效）textFieldDidBeginEditing:（UITextField*）textField
{
self.activeTextField=textField；
[自我更新位置]；
}
-（void）textfielddidediting:（UITextField*）textField
{
self.activeTextField=nil；
}
-（无效）注册工董事会通知
{
NSNotificationCenter*中心=[NSNotificationCenter defaultCenter]；
[center addObserver:自选择器：@selector（keyboardDidShow:）名称：UIKeyboardDidShowNotification对象：nil]；
[center addObserver:自选择器：@selector（keyboardWillHide:）名称：UIKeyboardWillHideNotification对象：nil]；
////添加轻触手势以放下第一响应者
//UITapGestureRecognizer*tapGR=[[UITapGestureRecognizer alloc]initWithTarget:自操作：@selector（tapToHideKeyboard:）]；
//[self.view addgesturecognizer:tapGR]；
}
-（void）translateView:（UIView*）视图到rect:（CGRect）rect with duration:（NSTimeInterval）duration
{
NSLog（@“将视图转换为rect:%@覆盖：%g”，NSStringFromCGRect（rect），持续时间）；
}
-（无效）更新位置
{
if（self.activeTextField&！CGRectIsNull（self.keyboardFrame））
{
UIWindow*window=[[UIApplication sharedApplication]keyWindow]；
CGRect localKeyboardFrame=[windowconvertRect:self.keyboardFrame-toView:self.view]；
//在键盘和文本字段之间留有最小的空间
CGFloat TEXTFIELDBUSTER=40；
CGRect textFieldFrame=self.activeTextField.frame；
CGRect viewFrame=self.view.frame；
viewFrame.origin.y=0；
如果（CGRectGetMaxY（textFieldFrame）+textFieldBuffer>CGRectGetMinY（localKeyboardFrame））
{
viewFrame.origin.y=-1.0*（CGRectGetMaxY（textFieldFrame）+textFieldBuffer-CGRectGetMinY（localKeyboardFrame））；
}
[自翻译视图：self.view到rect:viewFrame，持续时间：0.3]；
}
其他的
{
CGRect viewFrame=self.view.frame；
viewFrame.origin.y=0；
[自翻译视图：self.view到rect:viewFrame，持续时间：0.3]；
}
}
-（无效）键盘显示：（NSNotification*）通知
{
self.keyboardFrame=[[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue]；