IOS开发实现按钮长按连续触发效果

实现的效果就像是我们平时玩游戏的时候，长按发射按钮，飞机一直发射子弹一样

image.png

实现代码：

• 第一步：先生成一个视图，用来接收长按事件

    self.customView = [[UIView alloc] initWithFrame:CGRectMake(20, 300, 200, 200)];
    [self.view addSubview:self.customView];
    self.customView.backgroundColor = [UIColor greenColor];
    [self.customView addGestureRecognizer:[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)]];

• 第二步：增加调用目的函数的定时器

- (void)longPressAction:(UILongPressGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateBegan) {
        self.timer = [NSTimer timerWithTimeInterval:0.1 target:self selector:@selector(moveMethod) userInfo:nil repeats:YES];
        [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
    }
    
    if (gesture.state == UIGestureRecognizerStateEnded) {
        [self.timer invalidate];
        self.timer = nil;
    }
}

+第三步:设置要连续执行的函数

int count = 0;
- (void)moveMethod {
    NSLog(@"移动距离：%d",count++);
}