Iphone 触摸位置突出显示

我正试图通过使用

uigestureerecognizer

突出显示触摸事件，到目前为止，我可以获得用户触摸的

CGPoint

，但我不知道如何突出显示该特定区域，因为我对动画知之甚少

到目前为止，

viewDidLoad

上的代码：

UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(gradientTouchDown:)];

[self addGestureRecognizer:singleFingerTap];

获取触摸位置的方法：

-(void)gradientTouchDown:(UIGestureRecognizer*)recognizer{
    NSLog(@"tap detected.");
    CGPoint point = [recognizer locationInView:nil];

    NSLog(@"x = %f y = %f", point.x, point.y );

}

通过做一些研究，我想我需要添加一个视图动画上面的代码，但我如何才能识别触摸？守则：

  [UIView animateWithDuration:0.3f
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseIn
                     animations:^
     {
         [sender setAlpha:0.3f];
     }
                     completion:^(BOOL finished)
     {
         [sender setAlpha:1.0f];
     }];

---

我真的需要这方面的帮助，只要问任何问题，我总是在这里：）

这就是我如何在我的一个项目中为一个按钮实现我的动画。当按下按钮时，动画只会在按钮周围发光（就像在内置股票应用程序的图形视图中按下年份按钮时看到的发光）

首先，将这些目标添加到按钮：

[button addTarget:self action:@selector(myButtonPressed:) forControlEvents:UIControlEventTouchDown];
[button addTarget:self action:@selector(myButtonReleased:) forControlEvents:UIControlEventTouchUpInside];

然后这些方法如下所示：

- (void) myButtonPressed:(id) sender
{
    UIButton *button = (UIButton *) sender;
    CABasicAnimation *shadowRadius = [CABasicAnimation animationWithKeyPath:@"shadowRadius" ];
    shadowRadius.delegate = self;
    [shadowRadius setFromValue:[NSNumber numberWithFloat:3.0]];
    [shadowRadius setToValue:[NSNumber numberWithFloat:15.0]];
    [shadowRadius setDuration:0.2f];

    [[button layer] addAnimation:shadowRadius forKey:@"shadowRadius"];

    button.layer.shadowRadius = 15.0f;
}
- (void) myButtonReleased:(id) sender
{
    UIButton *button = (UIButton *) sender;

    CABasicAnimation *shadowRadius = [CABasicAnimation animationWithKeyPath:@"shadowRadius" ];
    shadowRadius.delegate = self;
    [shadowRadius setFromValue:[NSNumber numberWithFloat:15.0]];
    [shadowRadius setToValue:[NSNumber numberWithFloat:3.0]];
    [shadowRadius setDuration:0.2f];
    //shadowRadius.autoreverses = YES;

    [[button layer] addAnimation:shadowRadius forKey:@"shadowRadius"];

    button.layer.shadowRadius = 3.0f;
    button.selected = YES;
}

---

您好，感谢您的帮助，我推出了一个自定义解决方案，用于类似于Apple“Shows Touch on Highlight”的辉光效果。以下是辉光的代码：

-(void)gradientTouchDown:(UIGestureRecognizer*)recognizer{
    NSLog(@"tap detected");
    CGPoint point = [recognizer locationInView:nil];


    NSLog(@"x = %f y = %f", point.x, point.y );


    UIImage* image;
    UIColor *color = [UIColor whiteColor];

    UIGraphicsBeginImageContextWithOptions(recognizer.view.bounds.size, NO, [UIScreen mainScreen].scale); {
        [recognizer.view.layer renderInContext:UIGraphicsGetCurrentContext()];

        UIBezierPath* path = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, recognizer.view.bounds.size.width, recognizer.view.bounds.size.height)];

        [color setFill];

        [path fillWithBlendMode:kCGBlendModeSourceAtop alpha:1.0];


        image = UIGraphicsGetImageFromCurrentImageContext();
    } UIGraphicsEndImageContext();

    UIView* glowView = [[UIImageView alloc] initWithImage:image];
    glowView.center = self.center;
    [self.superview insertSubview:glowView aboveSubview:self];

    glowView.alpha = 0;
    glowView.layer.shadowColor = color.CGColor;
    glowView.layer.shadowOffset = CGSizeZero;
    glowView.layer.shadowRadius = 10;
    glowView.layer.shadowOpacity = 1.0;


    CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    animation.fromValue = @(0.0f);
    animation.toValue = @(0.6f);
    //animation.repeatCount = 2 ? HUGE_VAL : 0;
    animation.duration = 0.2;
    animation.autoreverses = YES;
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    [glowView.layer addAnimation:animation forKey:@"pulse"];


}

---

欢迎提出任何改进建议，到目前为止它对我有效：）

您是否尝试过创建视图、设置其帧、使用块动画淡入淡出并将其从superview中删除？这里是一个很好的起点（而不是在StackOverflow上问无意义的开放式问题）：你能告诉我你想要什么样的动画吗？只是用户点击的一个点或形状，或者用户平移时的一个路径？我使用了如下内容：[UIView animateWithDuration:0.3f delay:0.0选项：UIViewAnimationOptionCurveEaseIn animations:^{[sender setAlpha:0.3f]；}完成：^（BOOL finished）{[sender setAlpha:1.0f]；}]；动画很简单，只是在触摸时突出显示：）