UIButton触摸尺度？

Question

有人能告诉我如何扩大UIButton触摸范围吗？按钮应该按比例放大10%.

提前致谢!

Answer 1

呼叫

button.transform = CGAffineTransformMakeScale(1.1,1.1);

按下按钮处理程序.

或者如果你想用动画缩放:

[UIView beginAnimations:@"ScaleButton" context:NULL];
[UIView setAnimationDuration: 0.5f];
button.transform = CGAffineTransformMakeScale(1.1,1.1);
[UIView commitAnimations];

Answer 2

要完成答案,可以将按钮缩放(和重置)放入如下方法中:

// Scale up on button press
- (void) buttonPress:(UIButton*)button {
    button.transform = CGAffineTransformMakeScale(1.1, 1.1);
    // Do something else
}

// Scale down on button release
- (void) buttonRelease:(UIButton*)button {
    button.transform = CGAffineTransformMakeScale(1.0, 1.0);
    // Do something else
}

并与按钮的事件连接如下:

[btn addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchDown];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchUpInside];
[btn addTarget:self action:@selector(buttonRelease:) forControlEvents:UIControlEventTouchUpOutside];

注意1:将CGAffineTransformMakeScale值设置为1.0不会使它们保持在更改的值(即,它不会将1.1乘以1.0),而是将其设置回对象的原始比例.

注意2:不要忘记:选择器中的冒号,因为它允许将发送者作为参数传递给接收方法.在这种情况下,我们的方法接收UIButton,并在接口(.h文件)中声明为UIButton.

Answer 3

雨燕5

为了使其感觉更像本机 UIButton 行为，我更喜欢在子类中使用touchesBegun和方法：touchesEnded

class BaseButton: UIButton {
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        UIView.animate(withDuration: 0.3) {
            self.transform = CGAffineTransform(scaleX: 1.1, y: 1.1)
            self.titleLabel?.alpha = 0.7
        }
    }
    
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesEnded(touches, with: event)
        UIView.animate(withDuration: 0.3) {
            self.transform = .identity
            self.titleLabel?.alpha = 1
        }
    }
}

用法

在你的故事板中，只需让你的按钮继承自BaseButton.