检测触摸并按住屏幕IPhone（Xcode）

Question

我试图找出如何在游戏即时制作中检测触摸和保持屏幕方法。我使用触摸开始单击（让角色向上移动）当他们触摸并保持按住时，我希望角色直接向前移动。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

 //code to make him move up

    }

有关如何检测触摸和保持的任何想法？

Answer 1

Objective-c

// Add guesture recognizer
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(buttonDidLongPress:)];
    [self.button addGestureRecognizer:longPress];

// Call back event
- (void)buttonDidLongPress:(UILongPressGestureRecognizer*)gesture
{
    switch (gesture.state) {
        case UIGestureRecognizerStateBegan:
        {
            // Code
        }
            break;
        case UIGestureRecognizerStateEnded:
        {
            //Code
        }
            break;
        default:
            break;
    }
}

<强>夫特

// Add guesture recognizer
        let longPress = UILongPressGestureRecognizer(target: self, action: #selector(longPress(_:)))
        self.button.addGestureRecognizer(longPress)

// Call back event
func longPress(guesture: UILongPressGestureRecognizer) {

        switch guesture.state {
        case UIGestureRecognizerState.began:
            //Code
            break

        case UIGestureRecognizerState.ended:
            //Code
            break

        default:
            break
        }
    }

别忘了用UIGestureRecognizerDelegate扩展课程

Answer 2

尝试：

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
[self.view addGestureRecognizer:longPress];

-(void) handleLongPress: (UIGestureRecognizer *)longPress {
switch (longPress.state) {
    case UIGestureRecognizerStateBegan:
        // Called when long press for minimum time duration
        break;
    case UIGestureRecognizerStateChanged:
        // Long pressed and dragged 
        break;
    case UIGestureRecognizerStateRecognized:
        // Successfully recognised Long touch
        break;

    default:
        break;
}
if (longPress.state==UIGestureRecognizerStateEnded) {
    NSLog(@"LONG PRESSED");
}

}