Question

我写了一个在触摸外部子视图时解除子视图的方法。这是我的示例代码演示：

import UIKit

class ViewController: UIViewController {

    var testView = UIView()

    override func viewDidLoad() {
        super.viewDidLoad()

        let frame = CGRect(x: 10.0, y: 10.0, width: 100.0, height: 100.0)
        print("origin frame is \(frame)")

        testView = UIView(frame: frame)
        testView.center = self.view.center
        testView.backgroundColor = UIColor.greenColor()
        testView.userInteractionEnabled = true
        print("frame of test View is \(testView.frame)")

        self.view.addSubview(testView)

    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

        //got point of touch
        if let touchPlace = touches.first?.locationInView(view) {
            print("Your touch was at \(touchPlace)")
            let isInside = testView.pointInside(touchPlace, withEvent: nil)
            print("Will touch be inside subview? Answer: \(isInside)")
            if !isInside {
                testView.removeFromSuperview()
            }
        }
    }
}

然而，isInside总是假的，尽管有触摸的位置。这是控制台文本：

origin frame is (10.0, 10.0, 100.0, 100.0)
frame of test View is (157.0, 318.0, 100.0, 100.0)
Your touch was at (168.33332824707, 330.666656494141)
Will touch be inside subview? Answer: false

显然，触摸点在testView内部，并且我不知道如何使其工作。

提前致谢！

Answer 1

point方法的pointInside参数定义为：

接收者本地坐标系中的一个点（界限）。

相反，您希望针对textView的框架测试触摸点，该坐标系与触摸点（超视图坐标系）位于同一坐标系中：

let isInside = CGRectContainsPoint(testView.frame, touchPlace)

无论触摸内部视图，PointInside方法都返回false

1 个答案: