Question

抱歉，这是一个非常基本的初学者问题：想象一下有一个UITextField和一个UITextView。然后，想象一下放置在这些TextField / View上方的透明UIView，如果你触摸它们就不会响应。

如果你触摸（而不是滑动或捏等）UIView，我希望无论用户触摸什么（即TextField或View）都成为第一响应者。有没有像这样的命令：

[objectThatWasTouched becomeFirstResponder];？

我需要在以下方法中使用它。现在，它被设置为使UITextView成为第一响应者，但我希望触及的任何对象成为第一响应者：

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{

    [super touchesMoved:touches withEvent:event];

    UITouch *touch = [touches anyObject];
    CGPoint currentPosition = [touch locationInView:self.view];

    CGFloat deltaX = fabsf(gestureStartPoint.x - currentPosition.x); // will always be positive
    CGFloat deltaY = fabsf(gestureStartPoint.y - currentPosition.y); // will always be positive


    if (deltaY == 0 && deltaX == 0) {

        [self.view bringSubviewToFront:aSwipeTextView];
        [self.view bringSubviewToFront:noteTitle];
        [self.view bringSubviewToFront:doneEdit];


        [aSwipeTextView becomeFirstResponder];


    }


}

最后，我需要某种方法来摆脱第一响应者，即取决于第一响应者。当触摸UITextView时，这只会摆脱第一个响应者：

    - (IBAction)hideKeyboard
{
    [aSwipeTextView resignFirstResponder];
    [self.view bringSubviewToFront:canTouchMe];

}

Answer 1

UITouch *touch = [touches anyObject];

if (touch.view == mybutton){

        NSLog(@"My Button pressed");
}

Answer 2

您可以尝试这样的事情：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{

    [super touchesMoved:touches withEvent:event];

    UITouch *touch = [touches anyObject];
    CGPoint currentPosition = [touch locationInView:self.view];

    UIView *hitView = [self hitTest:currentPosition withEvent:event];

    if([hitView isKindOfClass:[UIResponder class]] && [hitView canBecomeFirstResponder]) {
       [hitView becomeFirstResponder];
    }

    // ... more code ...
}

Answer 3

注意：在这种情况下，myView应该启用userInteraction（myView.userInteractionEnabled = YES），否则触摸事件将传递给其userInteraction已启用的superView。

UITouch * touch = [触及anyObject];

if（touch.view == myView）{

    NSLog(@"My myView touched");

}

cocoa-touch：如何找出被触摸的对象

3 个答案: