Question

我有几个案例，测试人员报告说，只要他们开始在我的应用程序的某些字段中输入键盘，键盘就会消失。我使用模拟器跟踪流程，并在手机上进行调试时，问题没有发生。然而，当我在一个不受限制的手机上尝试时，它发生得相当一致。

这是一些相关的代码。所有这些都是在用户点击文本字段外时隐藏键盘。我的UIViews是我的Touchview类的子类，它接收所有触摸：

TouchView.h：

@protocol TouchViewDelegate <NSObject>

-(UIView *) handleTouches:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *) view;

@end

@interface TouchView : UIScrollView

@property (nonatomic, strong) id <TouchViewDelegate> touchDelegate;

@end

TouchView.m：

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView * touchedView = [super hitTest:point withEvent:event];
    NSSet* touches = [event allTouches];
    [self.touchDelegate handleTouches:touches withEvent:event inView:touchedView];
    return touchedView;

}

我将主视图配置为Touchview，并将其包含在viewDidLoad中：

- (void)viewDidLoad
{
[super viewDidLoad];

HMWTouchView * touchView = (HMWTouchView*) self.view;

touchView.touchDelegate = self;
...
}

这是委托方法的实现：

-(UIView *) handleTouches:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *) hitView {

if (![hitView isKindOfClass:[UIButton class]]) {
    [[UIResponder firstResponder] resignFirstResponder];
}
return self.view;
}

这看起来至少是IOS 8如何响应命中的变化。

Answer 1

问题是IOS 8.0（至少）改变了如何将命中发送到视图。以前，键盘窗口或文本字段中的命中被吸收而不会传递到hitview，这适用于此应用程序。 8.0改变了这一点，所有命中都会发送。

为了解决这个问题，我在命中测试代码中捕获了键盘窗口，并将hitView与textfield视图进行了比较以过滤掉这些：

Touchview.m现在有以下内容。 keyboardView方法改编自Stack Overflow答案：iOS: How to access the `UIKeyboard`?

-(UIView *) keyboardView {
//Return the current keyboard view
UIWindow * keyboardWindow;

UIView* keyboardView;

UIView* primaryKeyboardView;

for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
    if ([NSStringFromClass([window class]) isEqualToString:@"UITextEffectsWindow"])
    {
        keyboardWindow = window;
        break;
    }
}

for(int i = 0 ; i < [keyboardWindow.subviews count] ; i++)
{
    keyboardView = [keyboardWindow.subviews objectAtIndex:i];
    // keyboard found, add the button

    if([[keyboardView description] hasPrefix:@"<UIPeripheralHost"] == YES){
        primaryKeyboardView = keyboardView;
    }
    //This code will work on iOS 8.0
    else if([[keyboardView description] hasPrefix:@"<UIInputSetContainerView"] == YES){

        for(int i = 0 ; i < [keyboardView.subviews count] ; i++)
        {
            UIView* hostkeyboard = [keyboardView.subviews objectAtIndex:i];

            if([[hostkeyboard description] hasPrefix:@"<UIInputSetHost"] == YES){
                primaryKeyboardView = hostkeyboard;
            }
        }
    }
}
return primaryKeyboardView;
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView * touchedView = [super hitTest:point withEvent:event];
NSSet* touches = [event allTouches];
UIView * keyboardView = [self keyboardView];
if (touchedView != keyboardView) { //Ignore the hit if it's a keyboard
    [self.touchDelegate handleTouches:touches withEvent:event inView:touchedView];
}
return touchedView;
}

新的委托方法：

-(UIView *) handleTouches:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *) hitView {

if (![hitView isKindOfClass:[UIResponder class]]) {
    [[UIResponder firstResponder] resignFirstResponder];
}
return hitView;
}

firstResponder方法来自这个要点：https://gist.github.com/vilanovi/e52face5c6f00ce5254d

Answer 2

已在iOS 8.0.2中修复，不再需要。

Answer 3

对于我来说，这仍然发生在8.02中

Answer 4

我发现同样的问题 - 当用户试图键入键盘时，键盘会被解雇。

我的解决方案是一种解决方法。为了解决这个问题，我在键盘下面创建了一个虚拟的空UIView。此虚拟视图吸收并消耗敲击事件，键盘不会被解除。我在＆＃34; UIKeyboardDidShowNotification＆＃34;上创建了视图。并在＆＃34; UIKeyboardWillHideNotification＆＃34;上删除它。这解决了问题，并且适用于屏幕方向更改。

以下是我的视图控制器中的代码，其中包含显示键盘的文本字段：

/** Dummy view placed underneath the keyboard to prevent its dismissal. */
@property(nonatomic, strong) UIView *dummyView;

在viewDidLoad方法中，我们注册了键盘显示/隐藏通知：

// keyboard notifications - we need this to prevent keyboard dismissal
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWasShown:)
                                             name:UIKeyboardDidShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillBeHidden:)
                                             name:UIKeyboardWillHideNotification object:nil];

然后，在收到显示的＆＃39;键盘后，通知我们在键盘下面创建虚拟视图：

- (void)keyboardWasShown:(NSNotification*)notification {
    // we need this to prevent keyboard dismissal    
    NSDictionary* info = [notification userInfo];
    CGRect keyboardFrame = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    keyboardFrame = [self.view convertRect:keyboardFrame fromView:nil];
    self.dummyView = [[UIView alloc] initWithFrame:keyboardFrame];
    [self.view addSubview:self.dummyView];
}

...并在隐藏键盘时将其删除：

- (void)keyboardWillBeHidden:(NSNotification*)notification {
    [self.dummyView removeFromSuperview];
    self.dummyView = nil;
}

使用IOS 8编辑时，键盘会间歇性地消失

4 个答案: