Question

我正在移植一个具有内置专有手势系统的Windows touch应用程序，其中一个要求是我必须使用它。该手势系统采用一系列x，y点（每个触点一个点），并从这些原始点推断出手势。

我之前从未在iOS上做过这个，并且想知道最好的（只有???）方法是做什么的。

Answer 1

您需要使用Touches开始：

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

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self];

    touchLocation.x; // x coord
    touchLocation.y; // y coord
}

Answer 2

在swift：

确保您的ViewController实现了UIGestureRecognizerDelegate：

class MyViewController: UIViewController, UIGestureRecognizerDelegate{...}

在ViewController中覆盖以下内容：

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesBegan(touches, withEvent: event)
    if let touch: UITouch = touches.first as? UITouch{
        let touchLocation = touch.locationInView(self.view) as CGPoint
        touchLocation.x
        touchLocation.y
    }
}
override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
    //When gesture ends
}
override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    if let touch: UITouch = touches.first as? UITouch{
        let touchLocation = touch.locationInView(self.view) as CGPoint
        touchLocation.x
        touchLocation.y
    }
}

ios - 获得原始多点触控x，y位置

2 个答案: