IOS开发实现按钮长按连续触发效果

2020-02-25  本文已影响0人  perfect_coding

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
如上图,我按住向右的按钮,让角色移动一段距离。

实现代码:

    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:)]];
- (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++);
}
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