子视图A超出父视图B范围点击触发子视图A中的点击事件

Myth丶恋晨 2022-04-18 03:49 248阅读 0赞

[Demo][]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg_size_16_color_FFFFFF_t_70]  
解决示例  
1、定义子视图

// .h文件
    #import <UIKit/UIKit.h>
    
    @interface ButtonView : UIView
    
    @property (nonatomic, copy) void (^buttonClick)(UIButton *button);
    
    @end
    
    // .m文件
    #import "ButtonView.h"
    
    @interface ButtonView ()
    
    @property (nonatomic, strong) UIButton *subButton;
    
    @end
    
    @implementation ButtonView
    
    - (instancetype)initWithFrame:(CGRect)frame
    {
        self = [super initWithFrame:frame];
        if (self) {
            [self setUI];
        }
        return self;
    }
    
    - (void)setUI
    {
        //
        UIButton *button = [[UIButton alloc] initWithFrame:self.bounds];
        [self addSubview:button];
        button.backgroundColor = [UIColor greenColor];
        [button addTarget:self action:@selector(btn1Click:) forControlEvents:UIControlEventTouchUpInside];
        button.tag = 1;
        //
        self.subButton = [[UIButton alloc] initWithFrame:CGRectMake(100, -40, 80, 80)];
        [self addSubview:self.subButton];
        self.subButton.backgroundColor = [UIColor redColor];
        [self.subButton setTitle:@"click" forState:UIControlStateNormal];
        [self.subButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self.subButton setTitleColor:[UIColor yellowColor] forState:UIControlStateHighlighted];
        [self.subButton addTarget:self action:@selector(btn2Click:) forControlEvents:UIControlEventTouchUpInside];
        self.subButton.layer.cornerRadius = 40;
        self.subButton.layer.masksToBounds = YES;
        self.subButton.tag = 2;
    }
    
    - (void)btn1Click:(UIButton *)button
    {
        if (self.buttonClick) {
            self.buttonClick(button);
        }
    }
    
    - (void)btn2Click:(UIButton *)button
    {
        if (self.buttonClick) {
            self.buttonClick(button);
        }
    }
    
    // 在view中重写以下方法，其中self.button就是那个希望被触发点击事件的按钮
    - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
    {
        UIView *view = [super hitTest:point withEvent:event];
        if (view == nil) {
            // 转换坐标系
            CGPoint newPoint = [self.subButton convertPoint:point fromView:self];
            // 判断触摸点是否在button上
            if (CGRectContainsPoint(self.subButton.bounds, newPoint)) {
                view = self.subButton;
            }
        }
        return view;
    }
    
    @end

2、使用

ButtonView *buttonView = [[ButtonView alloc] initWithFrame:CGRectMake(20, 120, (self.view.frame.size.width - 40), 200)];
        [self.view addSubview:buttonView];
        buttonView.buttonClick = ^(UIButton *button) {
            NSString *message = [NSString stringWithFormat:@"点击了按钮 %ld", button.tag];
            [[[UIAlertView alloc] initWithTitle:nil message:message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"知道了", nil] show];
        };

效果图  
![在这里插入图片描述][20181108092949916.gif]

Untitled.gif  
注意，主要是实现该方法

// 在view中重写以下方法，其中self.button就是那个希望被触发点击事件的按钮
    - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
    {
        UIView *view = [super hitTest:point withEvent:event];
        if (view == nil) {
            // 转换坐标系
            CGPoint newPoint = [self.subButton convertPoint:point fromView:self];
            // 判断触摸点是否在button上
            if (CGRectContainsPoint(self.subButton.bounds, newPoint)) {
                view = self.subButton;
            }
        }
        return view;
    }

[Demo]: https://download.csdn.net/download/potato512/10771738
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3BvdGF0bzUxMg_size_16_color_FFFFFF_t_70]: /images/20220418/a7bf00f53a3b42cc9b52dc7485405a1f.png
[20181108092949916.gif]: /images/20220418/387d9f57704b4ba98e21f1e982e7d81a.png