使用 CABasicAnimation 旋转的 UIButton 不会移动初始触摸坐标

Posted 2023-03-21

【中文标题】使用 CABasicAnimation 旋转的 UIButton 不会移动初始触摸坐标

【英文标题】：UIButton rotate with CABasicAnimation does not move initial touch coordinates

【发布时间】：2014-08-24 10:08:55

【问题描述】：

我有一个 UIView，我在上面添加了一个 UIButton。我将 UIView 旋转 180 度。旋转 UIView 后，它里面的所有东西看起来都旋转了，包括按钮。但是当我点击按钮时。它仅从其初始位置接收触摸事件。不是从它出现在屏幕上的位置。这是我的代码 -

CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
fullRotation.fromValue = [NSNumber numberWithFloat:0];
fullRotation.toValue = [NSNumber numberWithFloat:((180*M_PI)/180)];
fullRotation.speed = 1.0;
fullRotation.autoreverses = NO;
fullRotation.removedOnCompletion = NO;
fullRotation.fillMode = kCAFillModeForwards;
[_subView.layer addAnimation:fullRotation forKey:@"360"];

【参考方案1】：

您无法从 Interface Builder 中执行此操作。您必须从代码中旋转它。像这样，

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 200)];
    [button addTarget:self action:@selector(selectedButton) forControlEvents:UIControlEventTouchUpInside];
    [button setBackgroundColor:[UIColor purpleColor]];

    CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    fullRotation.toValue = [NSNumber numberWithFloat:((180*M_PI)/180)];
    fullRotation.speed = 1.0;
    fullRotation.autoreverses = NO;
    fullRotation.removedOnCompletion = NO;
    fullRotation.fillMode = kCAFillModeForwards;
    [button.layer addAnimation:fullRotation forKey:@"360"];

    [self.view addSubview:button];

现在selectedButton 将接收每个旋转的 UIButton 触摸。