button动画过程中不能响应事件解决办法

Button在执行CAKeyframeAnimation动画时无法响应点击事件。
解决办法：
1、设置动画过程中可以交互。

options:UIViewKeyframeAnimationOptionAllowUserInteraction 

[UIView animateKeyframesWithDuration:20 delay:0 options:UIViewKeyframeAnimationOptionAllowUserInteraction animations:^{
            self.btn.frame = CGRectMake(100, 300, 100, 100);
        } completion:^(BOOL finished) {
            NSLog(@"xly--%@",@"finished");
            ret = YES;
        }];

设置过程中可以交互但是点击button依旧不会响应，因为这时的button已在移动的目标位置，点击目标位置会响应事件。
2、解决移动过程中点击button响应事件
如果点击位置在当前button显示的区域内 return YES

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
    if (self.animationAllowUserInteraction) {
        CGPoint p = [self convertPoint:point toView:self.superview];
        if ([self.layer.presentationLayer hitTest:p]) {
            return YES;
        }
    }
     return [super pointInside:point withEvent:event];
}

3、去除动画过程中点击目标位置响应的事件

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    if (self.animationAllowUserInteraction) {
        CGPoint pS =  [touches.anyObject locationInView:self.superview];
        if ([self.layer.presentationLayer hitTest:pS]) {
            [super touchesBegan:touches withEvent:event];
        }
    } else {
        [super touchesBegan:touches withEvent:event];
    }
}

源码：

#import "UIButton+Addtion.h"
#import <objc/runtime.h>

@implementation UIButton (Addtion)

- (void)setAnimationAllowUserInteraction:(BOOL)animationAllowUserInteraction {
    objc_setAssociatedObject(self, @selector(animationAllowUserInteraction), @(animationAllowUserInteraction), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (BOOL)animationAllowUserInteraction {
    return objc_getAssociatedObject(self, _cmd);
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
    if (self.animationAllowUserInteraction) {
        CGPoint p = [self convertPoint:point toView:self.superview];
        if ([self.layer.presentationLayer hitTest:p]) {
            return YES;
        }
    }
     return [super pointInside:point withEvent:event];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    if (self.animationAllowUserInteraction) {
        CGPoint pS =  [touches.anyObject locationInView:self.superview];
        if ([self.layer.presentationLayer hitTest:pS]) {
            [super touchesBegan:touches withEvent:event];
        }
    } else {
        [super touchesBegan:touches withEvent:event];
    }
}

@end

使用：

#import "UIButton+Addtion.h"
//设置button动画过程中响应事件
button.animationAllowUserInteraction = YES;
//设置动画支持响应事件
options:UIViewKeyframeAnimationOptionAllowUserInteraction

demo：
https://github.com/GitHubXuLiying/ButtonAnimationAllowUserInteraction