如何使用 MKMapView.gestureRecognizers 访问特定的 UIGestureRecognizer

Question

我在我的 viewDidLoad 方法中添加了一个 UILongPressGestureRecognizer：

var uilpgr = UILongPressGestureRecognizer(target: sMapView, action: "longPressDetected:")
    uilpgr.minimumPressDuration = 1
    sMapView.addGestureRecognizer(uilpgr)

我正试图在我的处理程序中禁用它。这是我唯一的手势识别器，现在我正在尝试：

            var recognizerList = sMapView.gestureRecognizers
            var recognizer = uilpgrList[0] as! UILongPressGestureRecognizer
            recognizer.enabled = false

我收到一个错误："cannot subscript a value of [AnyObject]? with an index of type 'Int'"

Answer 1

我没有考虑 sMapView.gestureRecognizers 返回的数组是可选的这一事实。

还发现了初始化的bug

当前工作代码：

初始化： var uilpgr = UILongPressGestureRecognizer（目标：自我，动作："longPressDetected:"） uilpgr.minimumPressDuration = 1 sMapView.addGestureRecognizer(uilpgr)

禁用：

var recognizer = sMapView.gestureRecognizers![0] as! UILongPressGestureRecognizer
recognized.enabled = false

启用：

var recognizer = sMapView.gestureRecognizers![0] as! UILongPressGestureRecognizer
recognized.enabled = true

如何使用 MKMapView.gestureRecognizers 访问特定的 UIGestureRecognizer

How to access a specific UIGestureRecognizer using MKMapView.gestureRecognizers

mapkit

uigesturerecognizer

ios

swift